Ontology of Astronomical Object Types

Term Name	Type	Definition
ADwarfStar	class	A DWARF STARS
AGN	class	AGN
AGiantStar	class	A GIANT STARS
AMHerCataclysmicVariable	class	AM Herculis
AStar	class	A Star
ASubDwarfStar	class	A SUBDWARF STARS
ASubGiantStar	class	A SUBGIANT STARS
ASuperGiantStar	class	A SUPERGIANT STARS
AbsoluteMagnitude	class	Absolute Magnitude
Abundances	class	ABUNDANCE
AccretingWhiteDwarf	class	Accreting White Dwarf
Accretion	class	ACCRETION
AccretionDisk	class	Accretion Disk
AccretionPoweredPulsar	class	Accretion-powered Pulsar
Age	class	AGE
Alpha2CanumVenaticorum	class	Alpha2 Canum Venaticorum Variable
AssociationOfStars	class	Association of Stars
Asteroid	class	Asteroid
AstrObject	class	Astronomical Object
AstroPortion	class	Portion of Astronomical Object
AsymptoticGiantBranchStar	class	AGB Star
AtomicElement	class	Atomic Element
AtomicElementBe	class
AtomicElementC	class
AtomicElementCa	class
AtomicElementCr	class
AtomicElementF	class
AtomicElementFe	class
AtomicElementH	class
AtomicElementHe	class
AtomicElementLi	class
AtomicElementN	class
AtomicElementNa	class
AtomicElementNe	class
AtomicElementO	class
AtomicElementS	class
AtomicElementSi	class
AtomicElementSr	class
AtomicElementTi	class
BDwarfStar	class	B DWARF STARS
BGiantStar	class	B GIANT STARS
BLLacertae	class	BLLac
BStar	class	B Star
BSubDwarfStar	class	B SUBDWARF STARS
BSuperGiant	class	B SUPERGIANT STARS
BYDraconis	class	BY Draconis Variable
BarredSpiralGalaxy	class	Barred Spiral Galaxy
BeStar	class	Be Star
BetaCephei	class	Beta Cephei Variable
Blazar	class	Blazar
Blue	class	Blue
BlueCompactGalaxy	class	Blue Compact Galaxy
BlueObject	class	Blue Object
BlueSuperGiant	class	Blue Supergiant
BokGlobule	class	Bok Globule
BrilliantGiantStar	class	Brilliant Giant
BrownDwarf	class	Brown Dwarf
CHEnvelopeTypeStar	class	CH Envelope-type Star
CarbonStar	class	Carbon Star
CataclysmicVariable	class	Cataclysmic Variable
CentimetricRadioSource	class	Centimetric Radio Source
Cepheid	class	Cepheid
Chromosphere	class	Chromosphere
ChromosphericActivity	class	Chromospheric Activity
CircumstellarDisk	class	Circumstellar disk
ClassicalTTauri	class	Classical T Tauri
ClassificationCategory	class	Class
Close	class	Close
Cloud	class	CLOUDS
ClusterOfGalaxies	class	Cluster of Galaxies
ClusterOfStars	class	Cluster of Stars
Comet	class	Comet
Compact	class	Compact Morphology
CompoundObject	class	Compound object
Contact	class	Contact
Continuum	class	Continuum
ContinuumNebular	class	Nebular Continuum
ContinuumNonThermal	class	Continuum Non-thermal
ContinuumThermal	class	Thermal Continuum
CoreDominated	class	Core Dominated
CosmologicalLensing	class	Cosmological Lensing
DQHerCataclysmicVariable	class	DQ Herculis
DarkCloud	class	Dark Nebula
DebrisDisk	class	Debris disk
DeltaCepheid	class	Classical Cepheid
DeltaScuti	class	Delta Scuti Variable Star
Detached	class
Disk	class	Disk
Distance	class
DoubleStar	class	Double Star
Dust	class	Dust
DwarfBarredSpiralGalaxy	class	Dwarf Barred Spiral Galaxy
DwarfEllipticalGalaxy	class	Dwarf Elliptical Galaxy
DwarfGalaxy	class	DWARF GALAXIES
DwarfIrregularGalaxy	class	Dwarf Irregular Galaxy
DwarfNova	class	Dwarf Nova
DwarfSpiralGalaxy	class	Dwarf Spiral Galaxy
DwarfStar	class	Dwarf
EMSource	class	EM Source
EMSpectrumRange	class	EM Spectrum Range
EarlyTypeStar	class	Early-type Star
Eclipse	class	Eclipse
EclipseAlgol	class	Eclipse of Algol Type
EclipseBetaLyrae	class	Eclipse of Beta Lyrae Type
EclipseWUMa	class	Eclipse of WUMa Type
EclipsingBinary	class	Eclipsing Binary
EclipsingBinaryAlgol	class	Algol Eclipsing Binary
EclipsingBinaryBetaLyrae	class	Beta Lyrae Eclipsing Binary
EclipsingBinaryWUMa	class	WUMa Eclipsing Binary
EffectiveTemperature	class	Effective Temperature
ElectronTemperature	class	Electron Temperature
EllipsoidalVariableStar	class	Ellipsoidal Variable Star
EllipticalGalaxy	class	Elliptical Galaxy
Emission	class	Emission Process
EmissionLineGalaxy	class	Emission-line Galaxy
EmissionLineStar	class	Emission-line Star
EmissionNebula	class	Emission Nebula
Envelope	class	Envelope
EquivalentWidth	class	Equivalent Width
EruptiveVariableStellarObject	class	Eruptive Variable Star
Explosion	class	Explosion or Eruption process
Extended	class	Extended
ExtremeUltraViolet	class	EXTREME ULTRAVIOLET RADIATION
ExtremeUltraVioletSource	class
ExtremelyRedObject	class	Extremely Red Object
FDwarfStar	class	F DWARF STARS
FStar	class	F Star
FSubDwarfStar	class	F SUBDWARF STARS
FSubGiantStar	class
FSuperGiantStar	class	F SUPERGIANT STARS
FUOrionis	class	FU Orionis Variable Star
FanaroffRileyTypeI	class	Fanaroff-Riley Type-1 Object
FanaroffRileyTypeII	class	Fanaroff-Riley type 2
FarInfrared	class	Far Infrared
FarInfraredSource	class	Far-IR Source
FlareStar	class	Flare Star
FlatSpectrumRadioQuasar	class	Flat-Spectrum Radio Quasar
Flux	class	Flux
FluxAmplitudeVariation	class	Flux Amplitude Variation
FluxRatio	class	Flux Ratio
FluxRatio_Radio5Ghz_Optical	class	Flux Ration Radio5Ghz-Optical
GDwarfStar	class	G Dwarf Star
GGiantStars	class	G Giant Star
GStar	class	G Star
GSubDwarfStar	class	G SUBDWARF STARS
GSubGiantStar	class	G Subgiant Star
GSuperGiantStar	class	G Supergiant Star
GalaxiesCompactGroup	class	Compact Group of Galaxies
GalaxiesGroup	class	Group of Galaxies
Galaxy	class	Galaxy
GalaxyInCluster	class	Galaxy in Cluster
GalaxyInGroup	class	Galaxy in Group
GalaxyInPair	class	Galaxy in Pair
GalaxyMorphology	class	Galaxy Morphology
GalaxyMorphologyBarredSpiral	class
GalaxyMorphologyDwarf	class
GalaxyMorphologyDwarfBarredSpiral	class
GalaxyMorphologyDwarfElliptical	class
GalaxyMorphologyDwarfIrregular	class
GalaxyMorphologyDwarfSpiral	class
GalaxyMorphologyElliptical	class
GalaxyMorphologyGiant	class
GalaxyMorphologyGiantElliptical	class
GalaxyMorphologyIrregular	class
GalaxyMorphologyLenticular	class
GalaxyMorphologyPeculiar	class
GalaxyMorphologyPolarRing	class
GalaxyMorphologyRing	class
GalaxyMorphologySpiral	class
GalaxyPair	class	Galaxy Pair
GammaDoradus	class	Gamma Doradus Variable
GammaRaySource	class	Gamma-ray Source
GammaRays	class	Gamma Rays
GiantEllipticalGalaxy	class	Giant Elliptical Galaxy
GiantGalaxy	class	GIANT GALAXIES
GiantStar	class	Giant
GlobularCluster	class	Globular Cluster
HIIGalaxy	class	HII Galaxy
HIIRegion	class	HII Region
HIRegion	class	HI Region
HIRegionCold	class	Cold HI Region
HIRegionWarm	class	HI Region Warm
HLineEmission	class	21 CM LINE
Halo	class	Halo
HerbigHaro	class	Herbig star
HighMassStar	class	High-mass Star
HighMassXrayBinary	class	High-mass X-ray Binary
HighPowerRadioLoudAGN	class	High-power Radio-loud AGN
HighPowerRadioQuietAGN_QSO	class	High-power Radio-quiet AGN
HighProperMotionStar	class	High-proper motion Star
HighRedshiftGalaxy	class	Galaxy with High Redshift
HighVelocityCloud	class	High-velocity Cloud
HighVelocityStar	class	High-velocity Star
HorizontalBranchStar	class	Horizontal-branch Star
InclinationWrtLOS	class
Infrared	class	Infrared
InfraredSource	class	Infrared Source
InterStellarMedium	class	ISM
InteractingGalaxy	class	Interacting Galaxy
IrregularGalaxy	class	Irregular Galaxy
IrregularVariableStellarObject	class	Irregular Variable Star
Jet	class	Jet
KStar	class	K Star
LINER	class	LINER AGN
LTypeIrregularStar	class	L-type Irregular Star
LargeSeparationRadioLobes	class	Large Separation Lobes
LateTypeStar	class	Late-type Star
LensedGalaxy	class	Lensed Galaxy
LensedQuasiStellarObject	class	Lensed Quasar
Lensing	class	Lensing Process
LenticularGalaxy	class	Lenticular Galaxy
LightCurve	class	Light Curve
LineEmission	class	Line Emission
LineWidth	class	Line Width
LobeDominated	class	Lobe Dominated
LongPeriodVariable	class	Long-period Variable
LowMassXRayBinary	class	Low-mass X-ray Binary
LowPowerRadioLoudAGN	class	Low-Power Radio-loud AGN
LowPowerRadioQuietAGN_Seyfert	class	Seyfert Galaxy
LowSurfaceBrightnessGalaxy	class	Low Surface Brightness Galaxy
LumX	class	LumX
LuminosityClass	class	Luminosity Class
LuminosityClassI	class
LuminosityClassII	class
LuminosityClassIII	class
LuminosityClassIV	class
LuminosityClassV	class
LuminosityClassVI	class
MStar	class	M Star
Magnetar	class	Magnetar
MagneticField	class	magnetic Field
Maser	class	Maser
MaserEmission	class	Maser Emission
Mass	class	Mass
Measurement	class	Measurement
MetricRadioSource	class	Metric Radio Source
MicroLensing	class	Micro-lensing
MillimetricRadioSource	class	Millimetric Radio Source
MiraCeti	class	Mira Ceti Variable
MolecularCloud	class	Molecular Cloud
Molecules	class	Molecules
Morphology	class	Morphological Feature
MorphologyCompoundObject	class	Compound Object Morphology
MultipleStar	class	Multiple Star
NearInfrared	class	Near Infrared
NearInfraredSource	class	Near-IR Source
Nebula	class	BRIGHT NEBULAE
NeutralGas	class	Neutral Gas
NeutronStar	class	Neutron Star
NonPeriodicProcess	class	Non-periodic process
NonRadialPulsation	class	Non-radial Pulsation
NonStellarBody	class	Non-stellar Body
Nova	class	Nova
NovaLikeObject	class	Nova-like Object
OBAssociation	class	association of stars of type O or B
OHIREnvelopeTypeStar	class	OH/IR Envelope-type Star
OStar	class	O Star
OldDisk	class	Old Disk
OpenCluster	class	Open Cluster
Optical	class	Optical
OpticalSource	class	Optical Source
OpticallyViolentlyVariableQuasar	class	Optically Violently Variable Object
OrionVariableStar	class	Orion Variable Star
Parallax	class	PARALLAXES
PartOfCloud	class	Part Of Cloud
PartOfGalaxy	class	Part of Galaxy
PeculiarGalaxy	class	Peculiar Galaxy
PeculiarStar	class	Peculiar Stellar Object
Period	class	Period
Photosphere	class	Photosphere
Planet	class	Planet
PlanetaryNebula	class	Planetary Nebula
PlanetaryNebulaCentralStar	class	Planetary Nebula Central Star
PlanetaryNebulaShell	class	Planetary Nebula Shell
PolarRingGalaxy	class	Polar Ring Galaxy
Polarization	class	POLARIZATION [WAVES]
PortionOfGalaxy	class	Portion of Galaxy
PortionOfStellarObject	class	Portion of Stellar Object
PostAsymptoticGiantBranchStar	class	Post-AGB Star
PostTTauri	class	Post-T Tauri Star
PowerRadio	class	Power Radio
PowerRadioGhz	class	Power Radio Ghz
PowerRadioMhz	class	Power Radio Mhz
PreMainSequenceStar	class	Pre-Main Sequence Star
Process	class	Process
ProperMotion	class	Proper Motion
ProtoPlanetaryDisk	class	Protoplanetary disk
ProtoStar	class	Protostar
Pulsar	class	Pulsar
PulsatingAlpha2CVn	class	Pulsating Alpha2 Canum Venaticorum
PulsatingStellarObject	class	Pulsating Star
PulsatingWhiteDwarf	class	Pulsating White Dwarf
Pulsation	class	Pulsation Process
QSO1AGN	class	QSO type 1
QSO2AGN	class	QSO2
RCoronaeBorealis	class	R Coronae Borealis Variable
RRLyrae	class	RR Lyrae Variable
RSCanumVenaticorum	class	RS Canum Venaticorum Variable Star
RVTauri	class	RV Tauri Variable Star
RadialPulsation	class	Radial Pulsation
RadialVelocity	class	Radial Velocity
Radio	class	Radio
RadioCentimetric	class	Radio Centimetric
RadioGalaxy	class	Radio Galaxy
RadioLoudAGN	class	Radio-loud AGN
RadioMetric	class	Radio Metric
RadioMillimetric	class	Radio Millimetric
RadioQuietAGN	class	Radio-quiet AGN
RadioSource	class	Radio Source
RadioSubMillimetric	class	Radio Submillimetric
RapidIrregularVariableStar	class	Rapid Irregular Variable Star
Red	class	Red
RedGiant	class	Red Giant
RedObject	class	Red Object
RedSuperGiant	class	Red Supergiant
Redshift	class	Redshift
Reflection	class	Reflection Process
ReflectionNebula	class	Reflection Nebula
RingGalaxy	class	Ring Galaxy
RocheLobe	class	Roche Lobe
Rotation	class	Rotation Process
RotationPoweredPulsar	class	Rotation-powered Pulsar
RotationallyVariableStellarObject	class	Rotationally Variable Object
SStar	class	S-type Star
SemiDetached	class
SemiRegularPulsatingStar	class	Semi-regular Pulsating Star
Seyfert15AGN	class	Seyfert 1.5 Galaxy
Seyfert1AGN	class	Seyfert 1 Galaxy
Seyfert2AGN	class	Seyfert 2 Galaxy
Shell	class	Shell
Shockwave	class	Shockwave
SmallSeparationRadioLobes	class
SpaceVelocity	class	Space Velocity
SpectralIndex	class	Spectral Index
SpectralType	class	Spectral Type
SpectralTypeA	class
SpectralTypeB	class
SpectralTypeC	class
SpectralTypeDA	class	white dwarf with hydrogen lines
SpectralTypeDB	class	white dwarf with He I lines
SpectralTypeDC	class	white dwarfs with continuous spectrum
SpectralTypeDH	class
SpectralTypeDO	class	white dwarf with He II lines
SpectralTypeDP	class	White dwarf with metal lines
SpectralTypeDQ	class	white dwarfs with carbon lines
SpectralTypeDX	class	White dwarf with metal lines
SpectralTypeDZ	class	White dwarf with metal lines
SpectralTypeF	class
SpectralTypeG	class
SpectralTypeK	class
SpectralTypeL	class
SpectralTypeM	class
SpectralTypeO	class
SpectralTypeS	class
SpectralTypeT	class
SpectroscopicBinary	class	Spectroscopic Binary
Spectrum	class	Spectrum
SpiralArm	class	Spiral Arm
SpiralGalaxy	class	Spiral Galaxy
Star	class	Star
Starburst	class	Starburst Process
StarburstGalaxy	class	Starburst Galaxy
SteepSpectrumRadioQuasar	class	Steep-spectrum Radio Quasar
StellarBlackHole	class	Stellar Black Hole
StellarObject	class	Stellar Object
StellarObjectInAssociation	class	Stellar Object in Association
StellarObjectInCluster	class	Stellar Object in Cluster
StellarObjectInDoubleStar	class	Stellar Object in Double Star
StellarObjectInNebula	class	Stellar Object in Nebula
StellarRemnant	class	Stellar Remnant
SubDwarfStar	class	Subdwarf
SubGiantStar	class	Subgiant
SubMillimetricRadioSource	class	Sub-millimetric Radio Source
SubStellarObject	class	Substellar Object
SuperClusterOfGalaxies	class	Super Cluster of Galaxies
SuperGiantStar	class	Supergiant
SuperNovaExplosionCoreCollapse	class	Core Collapse Supernova Explosion
SuperNovaExplosionThermonuclear	class	Thermonuclear Supernova Explosion
SuperNovaTypeI	class	Supernova type I
SuperNovaTypeII	class	Supernova type II
SuperNovaTypeIILP	class	Supernova type IILP
SuperNovaTypeIIb	class	Supernova type IIb
SuperNovaTypeIa	class	Supernova type Ia
SuperNovaTypeIb	class	Supernova type Ib
SuperNovaTypeIc	class	Supernova type Ic
SupermassiveBlackHole	class	Supermassive Black Hole
Supernova	class	supernova
SupernovaExplosion	class	Supernova Explosion
SupernovaRemnantShell	class	Supernova Remnant Shell
SurfaceBrightness	class	Surface Brightness
SymbioticStar	class	Symbiotic Star
SynchrotronEmission	class	Synchrotron Emission
TTauri	class	T Tauri Star
Temperature	class	temperature
UltraViolet	class	Ultraviolet
UltraVioletSource	class	UV Source
Unknown	class	Object of unknown nature
VariabilityTimeScale	class	Variability Time Scale
VariableStellarObject	class	DOUBLE MODE VARIABLE STARS
Velocity	class	Velocity
VelocityDispersion	class	VELOCITY DISPERSION
WVirginisStar	class	W Virginis Variable Star
WeakLineTTauri	class	Weak-line T Tauri
WhiteDwarf	class	White Dwarf
WolfRayetStar	class	Wolf-Rayet Star
XRayBinary	class	X-ray Binary
XRaySource	class	X-ray Source
XRays	class	X-Rays
YoungStellarObject	class	YSO
ADCkeyword	property	Astronomical Data Center keyword
GCVScode	property	General Catalogue of Variable Stars code corresponding to a concept of the ontology
IAUThesaurusAlias	property
IAUThesaurusLabel	property
IAUThesaurusToken	property
MISCcomment	property	any kind of comment on an element of the ontology
MISCdescription	property	Text definition of a concept, as complete as possible
MISCexternalTests	property	tests that should be taken care of outside of the ontology (e.g. check that a value is within sensible boundaries)
MISCgenericKeywords	property	keywords for various purposes like plain text search
MISCnaturalName	property	name in natural language for display purposes
MISCregistryAlternateSingleSubject	property
NEDcode	property	NED object type code
SIMBADluminosityClass	property	Main part of the luminosity class in SIMBAD (letters only, found within SIMBAD's spectral type value after said spectral type)
SIMBADmorphologicalType	property	morphological type for galaxies in SIMBAD
SIMBADname	property	Standard name in Simbad's object classification
SIMBADshortCode	property	Short code in Simbad's object classification
SIMBADspectralType	property	Main part of the spectral type in SIMBAD (letters only, found at the beginning of SIMBAD's spectral type value)
VIZIERkeyword	property	VizieR keyword corresponding to an item of the ontology
hasAbsorptionSpectralLine	property	features absorption spectral line(s) for
hasAbundanceOf	property	features an abundance of
hasComponent	property	has among its (direct) components
hasEmissionIn	property	features a noticeable emission in
hasEmissionSpectralLineFor	property	features emission spectral line(s) for
hasMeasurement	property	has among its measurements
hasMorphology	property	has among its morphological features
hasPortion	property	Indicates that the RANGE AstroPortion can be found whithin the DOMAIN CompoundObject or AstroPortion
hasProcess	property	has among its processes
hasProgenitor	property	has for progenitor
isClassificationOf	property	is class of
isClassifiedAs	property	is a member of the class:
isComponentOf	property	is component of
isIonizedBy	property	is ionized by
isMeasuredFor	property	is measured for
isMorphologyOf	property	is morphology of
isPortionOf	property	is portion of
isProcessOf	property

Class: ADwarfStar

Definition: A DWARF STARS

URI:	#ADwarfStar
Subclass of	#AStar and #DwarfStar
Disjoint with	#AGiantStar, #ASubDwarfStar, #ASubGiantStar, #ASuperGiantStar, #BDwarfStar, #FDwarfStar and #GDwarfStar
Paraphrase (experimental)	A #ADwarfStar is something that, amongst other things, is a #AStar and is a #DwarfStar but is not a #AGiantStar and is not a #ASubDwarfStar and is not a #ASubGiantStar and is not a #ASuperGiantStar and is not a #BDwarfStar and is not a #FDwarfStar and is not a #GDwarfStar

History

Class: AGN

Definition: AGN

URI:	#AGN
Label:	Active Galaxy Nucleus
Label:	AGN
Subclass of	#CompoundObject, #OpticalSource, (a composite term, see schema), (a composite term, see schema), (composite term, see schema), (a composite term, see schema)
Disjoint with	#AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #InterStellarMedium, #MultipleStar, #PlanetaryNebula, #Pulsar, #StellarObject, #SubStellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #AGN is something that, amongst other things, is a #CompoundObject and is a #OpticalSource and has (a complex restriction, see schema) and has (a complex restriction, see schema) and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #InterStellarMedium and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #Pulsar and is not a #StellarObject and is not a #SubStellarObject and is not a #SuperClusterOfGalaxies

History

Class: AGiantStar

Definition: A GIANT STARS

URI:	#AGiantStar
Subclass of	#AStar and #GiantStar
Disjoint with	#ADwarfStar, #ASubDwarfStar, #ASubGiantStar, #ASuperGiantStar, #BGiantStar and #GGiantStars
Paraphrase (experimental)	A #AGiantStar is something that, amongst other things, is a #AStar and is a #GiantStar but is not a #ADwarfStar and is not a #ASubDwarfStar and is not a #ASubGiantStar and is not a #ASuperGiantStar and is not a #BGiantStar and is not a #GGiantStars

History

Class: AMHerCataclysmicVariable

Definition: AM Herculis

URI:	#AMHerCataclysmicVariable
Label:	Cataclysmic Variable Star AM Her type
Label:	AM Herculis
Subclass of	#CataclysmicVariable, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#DQHerCataclysmicVariable, #DwarfNova, #Nova, #NovaLikeObject and #RSCanumVenaticorum
Paraphrase (experimental)	A #AMHerCataclysmicVariable is something that, amongst other things, is a #CataclysmicVariable and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #DQHerCataclysmicVariable and is not a #DwarfNova and is not a #Nova and is not a #NovaLikeObject and is not a #RSCanumVenaticorum

History

Class: AStar

Definition: A Star

URI:	#AStar
Label:	Star of Spectral Type A
Label:	A Star
Subclass of	#EarlyTypeStar
Paraphrase (experimental)	A #AStar is something that, amongst other things, is a #EarlyTypeStar

History

Class: ASubDwarfStar

Definition: A SUBDWARF STARS

URI:	#ASubDwarfStar
Subclass of	#AStar and #SubDwarfStar
Disjoint with	#ADwarfStar, #AGiantStar, #ASubGiantStar, #ASuperGiantStar, #BSubDwarfStar, #FSubDwarfStar and #GSubDwarfStar
Paraphrase (experimental)	A #ASubDwarfStar is something that, amongst other things, is a #AStar and is a #SubDwarfStar but is not a #ADwarfStar and is not a #AGiantStar and is not a #ASubGiantStar and is not a #ASuperGiantStar and is not a #BSubDwarfStar and is not a #FSubDwarfStar and is not a #GSubDwarfStar

History

Class: ASubGiantStar

Definition: A SUBGIANT STARS

URI:	#ASubGiantStar
Subclass of	#AStar and #SubGiantStar
Disjoint with	#ADwarfStar, #AGiantStar, #ASubDwarfStar, #ASuperGiantStar, #FSubGiantStar and #GSubGiantStar
Paraphrase (experimental)	A #ASubGiantStar is something that, amongst other things, is a #AStar and is a #SubGiantStar but is not a #ADwarfStar and is not a #AGiantStar and is not a #ASubDwarfStar and is not a #ASuperGiantStar and is not a #FSubGiantStar and is not a #GSubGiantStar

History

Class: ASuperGiantStar

Definition: A SUPERGIANT STARS

URI:	#ASuperGiantStar
Subclass of	#AStar and #SuperGiantStar
Disjoint with	#ADwarfStar, #AGiantStar, #ASubDwarfStar, #ASubGiantStar, #BSuperGiant, #FSuperGiantStar and #GSuperGiantStar
Paraphrase (experimental)	A #ASuperGiantStar is something that, amongst other things, is a #AStar and is a #SuperGiantStar but is not a #ADwarfStar and is not a #AGiantStar and is not a #ASubDwarfStar and is not a #ASubGiantStar and is not a #BSuperGiant and is not a #FSuperGiantStar and is not a #GSuperGiantStar

History

Class: AbsoluteMagnitude

Definition: Absolute Magnitude

URI:	#AbsoluteMagnitude
Label:	Absolute Magnitude
Subclass of	#Measurement
Disjoint with	#Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #AbsoluteMagnitude is something that, amongst other things, is a #Measurement but is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: Abundances

Definition: ABUNDANCE

URI:	#Abundances
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Abundances is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: AccretingWhiteDwarf

Definition: Accreting White Dwarf

URI:	#AccretingWhiteDwarf
Label:	Accreting White Dwarf
Subclass of	#DoubleStar and (a composite term, see schema)
Paraphrase (experimental)	A #AccretingWhiteDwarf is something that, amongst other things, is a #DoubleStar and has (a complex restriction, see schema)

History

Class: Accretion

Definition: ACCRETION

URI:	#Accretion
Subclass of	#Process
Paraphrase (experimental)	A #Accretion is something that, amongst other things, is a #Process

History

Class: AccretionDisk

Definition: accretion disk (SES) 1. Observational, signified via at least one of the following: (a) broad Halpha emission, which at appropriate resolution and S/N exhibits kinematic signatures of accretion (inverse P-Cygni); (b) ultraviolet excess emission (above photospheric levels), (c) gas in Keplerian rotation around the star; (d) 5 large amplitude and irregular photometric variability. Description: the excess UV is thought to arise from hot spots from accreting matter. It is often combined with emission lines (e.g. CO, [NeII], HCN, ...) that exhibit the characteristic double-horned profiles indicative of gas that could supply the accretion. 2. Physical, a disk – isolated or fed by material infalling from a protostellar envelope – which is transporting material inward toward the stellar surface.

URI:	#AccretionDisk
Label:	Accretion Disk
Subclass of	#Disk and (a composite term, see schema)
Paraphrase (experimental)	A #AccretionDisk is something that, amongst other things, is a #Disk and has (a complex restriction, see schema)

History

Class: AccretionPoweredPulsar

Definition: Accretion-powered Pulsar

URI:	#AccretionPoweredPulsar
Label:	Accretion-powered Pulsar
Subclass of	#Pulsar and #StellarObjectInDoubleStar
Disjoint with	#RotationPoweredPulsar
Paraphrase (experimental)	A #AccretionPoweredPulsar is something that, amongst other things, is a #Pulsar and is a #StellarObjectInDoubleStar but is not a #RotationPoweredPulsar

History

Class: Age

Definition: AGE

URI:	#Age
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Age is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: Alpha2CanumVenaticorum

Definition: Alpha2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields. Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually withine 0.01-0.1 mag in V. Sub-type: - Rapidly oscillating Alpha2 CVn variables. These are nonradially pulsating, rotating magnetic variables of Ap spectral type (DO Eri). Pulsation periods are in the range of 6-12 mmag (0.004-0.01 days), while amplitudes of light variation caused by the pulsation are about 0.01 mag in V. The pulsational variations are superposed on those caused by rotation.

URI:	#Alpha2CanumVenaticorum
Label:	Variable Star of alpha2 CVn type
Label:	Alpha2 Canum Venaticorum Variable
Subclass of	#DwarfStar, #EarlyTypeStar, #RotationallyVariableStellarObject, (a composite term, see schema) and (composite term, see schema)
Disjoint with	#BYDraconis, #BetaCephei, #GammaDoradus, #Pulsar, #RSCanumVenaticorum and #TTauri
Paraphrase (experimental)	A #Alpha2CanumVenaticorum is something that, amongst other things, is a #DwarfStar and is a #EarlyTypeStar and is a #RotationallyVariableStellarObject and has (a complex restriction, see schema) and something that, amongst other things, is a but is not a #BYDraconis and is not a #BetaCephei and is not a #GammaDoradus and is not a #Pulsar and is not a #RSCanumVenaticorum and is not a #TTauri

History

Class: AssociationOfStars

Definition: Association of Stars

URI:	#AssociationOfStars
Label:	Association of Stars
Subclass of	#CompoundObject, (a composite term, see schema)
Disjoint with	#AGN, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #GalaxyPair, #LINER, #MultipleStar, #PlanetaryNebula, #StellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #AssociationOfStars is something that, amongst other things, is a #CompoundObject and has (a complex restriction, see schema) but is not a #AGN and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #LINER and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject and is not a #SuperClusterOfGalaxies

History

Class: Asteroid

Definition: Asteroid

URI:	#Asteroid
Label:	Asteroid
Subclass of	#NonStellarBody
Disjoint with	#Comet and #Planet
Paraphrase (experimental)	A #Asteroid is something that, amongst other things, is a #NonStellarBody but is not a #Comet and is not a #Planet

History

Class: AstrObject

Definition: Any astronomical object

URI:	#AstrObject
Label:	Astronomical Object
Disjoint with	#AtomicElement, #ClassificationCategory, #EMSpectrumRange, #Measurement, #Morphology and #Process
Paraphrase (experimental)	A #AstrObject is something that, amongst other things, is not a #AtomicElement and is not a #ClassificationCategory and is not a #EMSpectrumRange and is not a #Measurement and is not a #Morphology and is not a #Process

History

Class: AstroPortion

Definition: Portion of an astronomical object which is not an astronomical object itself

URI:	#AstroPortion
Label:	Portion of Astronomical Object
Disjoint with	#AtomicElement, #ClassificationCategory, #EMSpectrumRange, #Measurement, #Morphology and #Process
Paraphrase (experimental)	A #AstroPortion is something that, amongst other things, is not a #AtomicElement and is not a #ClassificationCategory and is not a #EMSpectrumRange and is not a #Measurement and is not a #Morphology and is not a #Process

History

Class: AsymptoticGiantBranchStar

Definition: AGB Star

URI:	#AsymptoticGiantBranchStar
Label:	Asymptotic Giant Branch Star
Label:	AGB Star
Subclass of	#LateTypeStar
Paraphrase (experimental)	A #AsymptoticGiantBranchStar is something that, amongst other things, is a #LateTypeStar

History

Class: AtomicElement

Definition: Atomic Element

URI:	#AtomicElement
Label:	Atomic Element
Disjoint with	#AstrObject, #AstroPortion, #ClassificationCategory, #EMSpectrumRange, #Measurement, #Morphology and #Process
Paraphrase (experimental)	A #AtomicElement is something that, amongst other things, is not a #AstrObject and is not a #AstroPortion and is not a #ClassificationCategory and is not a #EMSpectrumRange and is not a #Measurement and is not a #Morphology and is not a #Process

History

Class: AtomicElementBe

Definition:

URI:	#AtomicElementBe
Subclass of	#AtomicElement
Disjoint with	#AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementBe is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementC

Definition:

URI:	#AtomicElementC
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementC is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementCa

Definition:

URI:	#AtomicElementCa
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementCa is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementCr

Definition:

URI:	#AtomicElementCr
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementCr is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementF

Definition:

URI:	#AtomicElementF
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementF is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementFe

Definition:

URI:	#AtomicElementFe
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementFe is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementH

Definition:

URI:	#AtomicElementH
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementH is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementHe

Definition:

URI:	#AtomicElementHe
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementHe is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementLi

Definition:

URI:	#AtomicElementLi
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementLi is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementN

Definition:

URI:	#AtomicElementN
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementN is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementNa

Definition:

URI:	#AtomicElementNa
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementNa is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementNe

Definition:

URI:	#AtomicElementNe
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementO, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementNe is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementO

Definition:

URI:	#AtomicElementO
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementS, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementO is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementS

Definition:

URI:	#AtomicElementS
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementSi, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementS is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementSi and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementSi

Definition:

URI:	#AtomicElementSi
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSr and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementSi is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSr and is not a #AtomicElementTi

History

Class: AtomicElementSr

Definition:

URI:	#AtomicElementSr
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi and #AtomicElementTi
Paraphrase (experimental)	A #AtomicElementSr is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementTi

History

Class: AtomicElementTi

Definition:

URI:	#AtomicElementTi
Subclass of	#AtomicElement
Disjoint with	#AtomicElementBe, #AtomicElementC, #AtomicElementCa, #AtomicElementCr, #AtomicElementF, #AtomicElementFe, #AtomicElementH, #AtomicElementHe, #AtomicElementLi, #AtomicElementN, #AtomicElementNa, #AtomicElementNe, #AtomicElementO, #AtomicElementS, #AtomicElementSi and #AtomicElementSr
Paraphrase (experimental)	A #AtomicElementTi is something that, amongst other things, is a #AtomicElement but is not a #AtomicElementBe and is not a #AtomicElementC and is not a #AtomicElementCa and is not a #AtomicElementCr and is not a #AtomicElementF and is not a #AtomicElementFe and is not a #AtomicElementH and is not a #AtomicElementHe and is not a #AtomicElementLi and is not a #AtomicElementN and is not a #AtomicElementNa and is not a #AtomicElementNe and is not a #AtomicElementO and is not a #AtomicElementS and is not a #AtomicElementSi and is not a #AtomicElementSr

History

Class: BDwarfStar

Definition: B DWARF STARS

URI:	#BDwarfStar
Subclass of	#BStar and #DwarfStar
Disjoint with	#ADwarfStar, #BGiantStar, #BSubDwarfStar, #BSuperGiant, #BeStar, #FDwarfStar and #GDwarfStar
Paraphrase (experimental)	A #BDwarfStar is something that, amongst other things, is a #BStar and is a #DwarfStar but is not a #ADwarfStar and is not a #BGiantStar and is not a #BSubDwarfStar and is not a #BSuperGiant and is not a #BeStar and is not a #FDwarfStar and is not a #GDwarfStar

History

Class: BGiantStar

Definition: B GIANT STARS

URI:	#BGiantStar
Subclass of	#BStar and #GiantStar
Disjoint with	#AGiantStar, #BDwarfStar, #BSubDwarfStar, #BSuperGiant and #GGiantStars
Paraphrase (experimental)	A #BGiantStar is something that, amongst other things, is a #BStar and is a #GiantStar but is not a #AGiantStar and is not a #BDwarfStar and is not a #BSubDwarfStar and is not a #BSuperGiant and is not a #GGiantStars

History

Class: BLLacertae

Definition: BLLac

URI:	#BLLacertae
Label:	BL Lacertae Object, Type1 Active Galactic Nucleus
Label:	BLLac
Subclass of	#LowPowerRadioLoudAGN
Disjoint with	#FanaroffRileyTypeI
Paraphrase (experimental)	A #BLLacertae is something that, amongst other things, is a #LowPowerRadioLoudAGN but is not a #FanaroffRileyTypeI

History

Class: BStar

Definition: B Star

URI:	#BStar
Label:	Star of Spectral Type B
Label:	B Star
Subclass of	#EarlyTypeStar
Paraphrase (experimental)	A #BStar is something that, amongst other things, is a #EarlyTypeStar

History

Class: BSubDwarfStar

Definition: B SUBDWARF STARS

URI:	#BSubDwarfStar
Subclass of	#BStar and #SubDwarfStar
Disjoint with	#ASubDwarfStar, #BDwarfStar, #BGiantStar, #BSuperGiant, #FSubDwarfStar and #GSubDwarfStar
Paraphrase (experimental)	A #BSubDwarfStar is something that, amongst other things, is a #BStar and is a #SubDwarfStar but is not a #ASubDwarfStar and is not a #BDwarfStar and is not a #BGiantStar and is not a #BSuperGiant and is not a #FSubDwarfStar and is not a #GSubDwarfStar

History

Class: BSuperGiant

Definition: B SUPERGIANT STARS

URI:	#BSuperGiant
Subclass of	#BStar and #SuperGiantStar
Disjoint with	#ASuperGiantStar, #BDwarfStar, #BGiantStar, #BSubDwarfStar, #FSuperGiantStar, #GSuperGiantStar and #RCoronaeBorealis
Paraphrase (experimental)	A #BSuperGiant is something that, amongst other things, is a #BStar and is a #SuperGiantStar but is not a #ASuperGiantStar and is not a #BDwarfStar and is not a #BGiantStar and is not a #BSubDwarfStar and is not a #FSuperGiantStar and is not a #GSuperGiantStar and is not a #RCoronaeBorealis

History

Class: BYDraconis

Definition: BY Draconis-type variables, which are emission-line dwarfs of dKe-dMe spectral type showing quasiperiodic light changes with periods from a fraction of a day to 120 days and amplitudes from several hundredths to 0.5 mag in V. The light variability is caused by axial rotation of a star with a variable degree of nonuniformity of the surface brightness (spots) and chromospheric activity. Some of these stars also show flares similar to those of UV Cet stars, and in those cases they also belong to the latter type and are simultaneously considered eruptive variables.

URI:	#BYDraconis
Label:	Varaible Star of BY Dra type
Label:	BY Draconis Variable
Subclass of	#DwarfStar, #LateTypeStar and #RotationallyVariableStellarObject
Disjoint with	#Alpha2CanumVenaticorum, #GammaDoradus, #LongPeriodVariable, #Pulsar and #TTauri
Paraphrase (experimental)	A #BYDraconis is something that, amongst other things, is a #DwarfStar and is a #LateTypeStar and is a #RotationallyVariableStellarObject but is not a #Alpha2CanumVenaticorum and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #Pulsar and is not a #TTauri

History

Class: BarredSpiralGalaxy

Definition: Barred Spiral Galaxy

URI:	#BarredSpiralGalaxy
Label:	Barred Spiral Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #BarredSpiralGalaxy is something that, amongst other things, is a #Galaxy

History

Class: BeStar

Definition: Be Star

URI:	#BeStar
Label:	Be Star
Subclass of	#BStar and #EmissionLineStar
Disjoint with	#BDwarfStar and #WolfRayetStar
Paraphrase (experimental)	A #BeStar is something that, amongst other things, is a #BStar and is a #EmissionLineStar but is not a #BDwarfStar and is not a #WolfRayetStar

History

Class: BetaCephei

Definition: Variables of the Beta Cephei type (Beta Cep, Beta CMa), which are pulsating O8-B6 I-V stars with periods of light and radial-velocity variations in the range of 0.1 - 0.6 days and light amplitudes from 0.01 to 0.3 mag in V. The light curves are similar in shape to average radial-velocity curves but lag in phase by a quarter of the period, so that maximum brightness corresponds to maximum contraction, i.e., to minimum stellar radius. The majority of these stars probably show radial pulsations, but some (V649 Per) display nonradial pulsations; multiperiodicity is characteristic of many of these stars. Sub-type: - A short-period group of Beta Cep variables. The spectral types are B2-B3 IV-V; periods and light amplitudes are in the ranges 0.02 - 0.04 days and 0.015 - 0.025 days, respectively, i.e., an order of magnitude smaller than the normally observed ones.

URI:	#BetaCephei
Label:	Variable of the Beta Cep type
Label:	Beta Cephei Variable
Subclass of	#EarlyTypeStar and #PulsatingStellarObject
Disjoint with	#Alpha2CanumVenaticorum, #Cepheid, #DeltaScuti, #GammaDoradus, #HerbigHaro, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae, #RVTauri and #WVirginisStar
Paraphrase (experimental)	A #BetaCephei is something that, amongst other things, is a #EarlyTypeStar and is a #PulsatingStellarObject but is not a #Alpha2CanumVenaticorum and is not a #Cepheid and is not a #DeltaScuti and is not a #GammaDoradus and is not a #HerbigHaro and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #WVirginisStar

History

Class: Blazar

Definition: Blazar

URI:	#Blazar
Label:	Blazar
Subclass of	#BLLacertae and #FlatSpectrumRadioQuasar
Disjoint with	#OpticallyViolentlyVariableQuasar
Paraphrase (experimental)	A #Blazar is something that, amongst other things, is a #BLLacertae and is a #FlatSpectrumRadioQuasar but is not a #OpticallyViolentlyVariableQuasar

History

Class: Blue

Definition: Blue

URI:	#Blue
Label:	Blue
Subclass of	#Optical
Paraphrase (experimental)	A #Blue is something that, amongst other things, is a #Optical

History

Class: BlueCompactGalaxy

Definition: Blue Compact Galaxy

URI:	#BlueCompactGalaxy
Label:	Blue Compact Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #BlueCompactGalaxy is something that, amongst other things, is a #Galaxy

History

Class: BlueObject

Definition: Blue Object

URI:	#BlueObject
Label:	Blue Object
Subclass of	#EMSource
Disjoint with	#RedObject
Paraphrase (experimental)	A #BlueObject is something that, amongst other things, is a #EMSource but is not a #RedObject

History

Class: BlueSuperGiant

Definition: Blue Supergiant

URI:	#BlueSuperGiant
Label:	Blue Supergiant
Subclass of	#OStar and #SuperGiantStar
Paraphrase (experimental)	A #BlueSuperGiant is something that, amongst other things, is a #OStar and is a #SuperGiantStar

History

Class: BokGlobule

Definition: Bok Globule

URI:	#BokGlobule
Label:	Bok Globule
Subclass of	#DarkCloud and (a composite term, see schema)
Paraphrase (experimental)	A #BokGlobule is something that, amongst other things, is a #DarkCloud and has (a complex restriction, see schema)

History

Class: BrilliantGiantStar

Definition: Brilliant Giant

URI:	#BrilliantGiantStar
Label:	Star of Luminosity Class II
Label:	Brilliant Giant
Subclass of	#Star
Paraphrase (experimental)	A #BrilliantGiantStar is something that, amongst other things, is a #Star

History

Class: BrownDwarf

Definition: Brown Dwarf

URI:	#BrownDwarf
Label:	Brown Dwarf
Subclass of	#NearInfraredSource, #StellarObject, #SubStellarObject, (a composite term, see schema)
Disjoint with	#NonStellarBody, #Star, #TTauri and #YoungStellarObject
Paraphrase (experimental)	A #BrownDwarf is something that, amongst other things, is a #NearInfraredSource and is a #StellarObject and is a #SubStellarObject and has no more than 1 #hasComponent property but is not a #NonStellarBody and is not a #Star and is not a #TTauri and is not a #YoungStellarObject

History

Class: CHEnvelopeTypeStar

Definition: CH Envelope-type Star

URI:	#CHEnvelopeTypeStar
Label:	CH Envelope-type Star
Subclass of	#PeculiarStar
Paraphrase (experimental)	A #CHEnvelopeTypeStar is something that, amongst other things, is a #PeculiarStar

History

Class: CarbonStar

Definition: Carbon Star

URI:	#CarbonStar
Label:	Carbon Star
Subclass of	#AsymptoticGiantBranchStar
Disjoint with	#OHIREnvelopeTypeStar, #RedSuperGiant and #SStar
Paraphrase (experimental)	A #CarbonStar is something that, amongst other things, is a #AsymptoticGiantBranchStar but is not a #OHIREnvelopeTypeStar and is not a #RedSuperGiant and is not a #SStar

History

Class: CataclysmicVariable

Definition: Variable stars showing outbursts caused by thermonuclear burst processes in their surface layers (novae) or deep in their interiors (supernovae). We use the term "novalike" for variables that show novalike outbursts caused by rapid energy release in the surrounding space (UG-type stars) and also for objects not displaying outbursts but resembling explosive variables at minimum light by their spectral (or other) characteristics. The majority of explosive and novalike variables are close binary systems, their components having strong mutual influence on the evolution of each star. It is often observed that the hot dwarf component of the system is surrounded by an accretion disk formed by matter lost by the other, cooler, and more extended component.

URI:	#CataclysmicVariable
Label:	Cataclysmic Variable
Subclass of	#DoubleStar, #EruptiveVariableStellarObject, (a composite term, see schema)
Disjoint with	#EclipsingBinary, #OrionVariableStar, #RCoronaeBorealis, #RapidIrregularVariableStar, #SpectroscopicBinary and #XRayBinary
Paraphrase (experimental)	A #CataclysmicVariable is something that, amongst other things, is a #DoubleStar and is a #EruptiveVariableStellarObject and has (a complex restriction, see schema) but is not a #EclipsingBinary and is not a #OrionVariableStar and is not a #RCoronaeBorealis and is not a #RapidIrregularVariableStar and is not a #SpectroscopicBinary and is not a #XRayBinary

History

Class: CentimetricRadioSource

Definition: Centimetric Radio Source

URI:	#CentimetricRadioSource
Label:	Centimetric Radio Source
Subclass of	#RadioSource and (a composite term, see schema)
Paraphrase (experimental)	A #CentimetricRadioSource is something that, amongst other things, is a #RadioSource and has (a complex restriction, see schema)

History

Class: Cepheid

Definition: Cepheids. Radially pulsating, high luminosity (classes Ib-II) variables with periods in the range of 1-135 days and amplitudes from several hundredths to 2 mag in V (in the B band, the amplitudes are greater). Spectral type at maximum light is F; at minimum, the types are G-K. The longer the period of light variation, the later is the spectral type. The maximum of the surface-layer expansion velocity almost coinciding with maximum light. Sub-type: - Cepheids (TU Cas, V 367 Sct) displaying the presence of two or more simultaneously operating pulsation modes (usually the fundamental tone with the period P0 and the first overtone P1). The periods P0 are in the range from 2 to 7 days, with the ratio P1/P0 approx. 0.71.

URI:	#Cepheid
Label:	Cepheid variable star
Label:	Cepheid
Subclass of	#PulsatingStellarObject and #Star
Disjoint with	#BetaCephei, #DeltaScuti, #GammaDoradus, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae, #RVTauri, #TTauri and #WVirginisStar
Paraphrase (experimental)	A #Cepheid is something that, amongst other things, is a #PulsatingStellarObject and is a #Star but is not a #BetaCephei and is not a #DeltaScuti and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #TTauri and is not a #WVirginisStar

History

Class: Chromosphere

Definition: Chromosphere

URI:	#Chromosphere
Label:	Chromosphere
Subclass of	#PortionOfStellarObject
Paraphrase (experimental)	A #Chromosphere is something that, amongst other things, is a #PortionOfStellarObject

History

Class: ChromosphericActivity

Definition: Chromospheric Activity

URI:	#ChromosphericActivity
Label:	Corresponds to an important chromosperic activity, usually a source of emission
Label:	Chromospheric Activity
Subclass of	#Process
Paraphrase (experimental)	A #ChromosphericActivity is something that, amongst other things, is a #Process

History

Class: CircumstellarDisk

Definition: circumstellar disk (LH) 1. Physical, any disk of gas and/or dust surrounding a star. 2. Physical, a disk surrounding only a single star, not a binary.

URI:	#CircumstellarDisk
Label:	Circumstellar disk
Subclass of	#Disk and #PortionOfStellarObject
Paraphrase (experimental)	A #CircumstellarDisk is something that, amongst other things, is a #Disk and is a #PortionOfStellarObject

History

Class: ClassicalTTauri

Definition: Classical T Tauri Star (CTTS) 1. (Original) Observational, a solar-type PMS star that exhibits at least one of the following: (a) broad, strong Halpha emission (Joy, 1945, ApJ 102, 168); (b) ultraviolet excess emission (above photospheric levels); (c) forbidden and in some cases permitted line emission; and (d) irregular optical variability. Description: Such stars can exhibit IR SEDs that span Class I-II, and in some cases, Transition Disk SEDs (see below). Typical examples are AA Tau; BP Tau (Class II); and HL Tau, DG Tau. 2. Physical, A solar-type PMS star surrounded by an accretion disk, and in some cases, an accretion disk and a ‘remnant’ envelope. An accretiondriven wind, manifest in emission line spectra, is also present. Description: The key distinguishing characteristics are the presence of an accretion disk and an accretion-driven wind. However, CTTS cover a ‘broad’ range of evolutionary stages.

URI:	#ClassicalTTauri
Label:	Classical T Tauri
Subclass of	#TTauri
Disjoint with	#HerbigHaro and #WeakLineTTauri
Paraphrase (experimental)	A #ClassicalTTauri is something that, amongst other things, is a #TTauri but is not a #HerbigHaro and is not a #WeakLineTTauri

History

Class: ClassificationCategory

Definition: Class

URI:	#ClassificationCategory
Label:	Class
Disjoint with	#AstrObject, #AstroPortion, #AtomicElement, #EMSpectrumRange, #Measurement, #Morphology and #Process
Paraphrase (experimental)	A #ClassificationCategory is something that, amongst other things, is not a #AstrObject and is not a #AstroPortion and is not a #AtomicElement and is not a #EMSpectrumRange and is not a #Measurement and is not a #Morphology and is not a #Process

History

Class: Close

Definition: Close

URI:	#Close
Label:	Close
Subclass of	#MorphologyCompoundObject
Disjoint with	#Detached
Paraphrase (experimental)	A #Close is something that, amongst other things, is a #MorphologyCompoundObject but is not a #Detached

History

Class: Cloud

Definition: CLOUDSDENSE CLOUDS

URI:	#Cloud
Subclass of	#InterStellarMedium and (composite term, see schema)
Disjoint with	#Nebula
Paraphrase (experimental)	A #Cloud is something that, amongst other things, is a #InterStellarMedium and something that, amongst other things, is a something that, amongst other things, is a but is not a #Nebula

History

Class: ClusterOfGalaxies

Definition: Cluster of Galaxies

URI:	#ClusterOfGalaxies
Label:	Cluster of Galaxies
Subclass of	#CompoundObject, (composite term, see schema), (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #GalaxyPair, #LINER, #MultipleStar, #PlanetaryNebula, #StellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #ClusterOfGalaxies is something that, amongst other things, is a #CompoundObject and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #LINER and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject and is not a #SuperClusterOfGalaxies

History

Class: ClusterOfStars

Definition: Cluster of Stars

URI:	#ClusterOfStars
Label:	Cluster of Stars
Subclass of	#CompoundObject, (composite term, see schema), (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfGalaxies, #GalaxiesGroup, #Galaxy, #GalaxyPair, #LINER, #MultipleStar, #PlanetaryNebula, #StellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #ClusterOfStars is something that, amongst other things, is a #CompoundObject and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #LINER and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject and is not a #SuperClusterOfGalaxies

History

Class: Comet

Definition: Comet

URI:	#Comet
Label:	Comet
Subclass of	#NonStellarBody
Disjoint with	#Asteroid and #Planet
Paraphrase (experimental)	A #Comet is something that, amongst other things, is a #NonStellarBody but is not a #Asteroid and is not a #Planet

History

Class: Compact

Definition: Compact Morphology

URI:	#Compact
Label:	Compact Morphology
Subclass of	#Morphology, (composite term, see schema), (a composite term, see schema)
Disjoint with	#Extended
Paraphrase (experimental)	A #Compact is something that, amongst other things, is a #Morphology and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #Extended

History

Class: CompoundObject

Definition: A composite object is made of at least two distinct astronomical objects

URI:	#CompoundObject
Label:	Compound object
Subclass of	#AstrObject, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#Unknown
Paraphrase (experimental)	A #CompoundObject is something that, amongst other things, is a #AstrObject and has (a complex restriction, see schema) and has at least 2 #hasComponent property but is not a #Unknown

History

Class: Contact

Definition: Contact

URI:	#Contact
Label:	Contact
Subclass of	#Close
Paraphrase (experimental)	A #Contact is something that, amongst other things, is a #Close

History

Class: Continuum

Definition: Continuum

URI:	#Continuum
Label:	Range allowing the description of the existence of a (noticeable) continuum for a given object
Label:	Continuum
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Continuum is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: ContinuumNebular

Definition: Nebular Continuum

URI:	#ContinuumNebular
Label:	Recombination thermal continuum
Label:	Nebular Continuum
Subclass of	#Continuum, (a composite term, see schema)
Disjoint with	#ContinuumNonThermal and #ContinuumThermal
Paraphrase (experimental)	A #ContinuumNebular is something that, amongst other things, is a #Continuum and has (a complex restriction, see schema) but is not a #ContinuumNonThermal and is not a #ContinuumThermal

History

Class: ContinuumNonThermal

Definition: Continuum Non-thermal

URI:	#ContinuumNonThermal
Label:	Continuum Non-thermal
Subclass of	#Continuum, (a composite term, see schema)
Disjoint with	#ContinuumThermal
Paraphrase (experimental)	A #ContinuumNonThermal is something that, amongst other things, is a #Continuum and has (a complex restriction, see schema) but is not a #ContinuumThermal

History

Class: ContinuumThermal

Definition: Thermal Continuum

URI:	#ContinuumThermal
Label:	Black Body thermal continuum
Label:	Thermal Continuum
Subclass of	#Continuum
Paraphrase (experimental)	A #ContinuumThermal is something that, amongst other things, is a #Continuum

History

Class: CoreDominated

Definition: Core Dominated

URI:	#CoreDominated
Label:	Core/Extented Flux Ratio >1
Label:	Core Dominated
Subclass of	#Morphology and (composite term, see schema)
Disjoint with	#LobeDominated
Paraphrase (experimental)	A #CoreDominated is something that, amongst other things, is a #Morphology and something that, amongst other things, is a but is not a #LobeDominated

History

Class: CosmologicalLensing

Definition: Cosmological Lensing

URI:	#CosmologicalLensing
Label:	Cosmological Lensing
Subclass of	#Lensing, (a composite term, see schema)
Disjoint with	#MicroLensing
Paraphrase (experimental)	A #CosmologicalLensing is something that, amongst other things, is a #Lensing and has (a complex restriction, see schema) but is not a #MicroLensing

History

Class: DQHerCataclysmicVariable

Definition: DQ Herculis

URI:	#DQHerCataclysmicVariable
Label:	Cataclysmic Variable Star DQ Her type
Label:	DQ Herculis
Subclass of	#CataclysmicVariable, (a composite term, see schema) and (composite term, see schema)
Disjoint with	#AMHerCataclysmicVariable, #DwarfNova, #Nova, #NovaLikeObject and #RSCanumVenaticorum
Paraphrase (experimental)	A #DQHerCataclysmicVariable is something that, amongst other things, is a #CataclysmicVariable and has (a complex restriction, see schema) and something that, amongst other things, is a but is not a #AMHerCataclysmicVariable and is not a #DwarfNova and is not a #Nova and is not a #NovaLikeObject and is not a #RSCanumVenaticorum

History

Class: DarkCloud

Definition: Dark Nebula

URI:	#DarkCloud
Label:	Dark Nebula
Subclass of	#MolecularCloud
Paraphrase (experimental)	A #DarkCloud is something that, amongst other things, is a #MolecularCloud

History

Class: DebrisDisk

Definition: debris disk (LH) 1. Physical, circumstellar disk composed of rock, dust, and ice. 2. Physical, gas-poor circumstellar disk in which the primary physical process is the collisional grinding down of planetesimals into smaller particles, eventually dust which is known as “second generation” dust. 3. Physical, optically thin disk in which material is removed from the system via various drag or blowout scenarios on timescales much less than the age of the star. Description: Indicator of a planetary system given that large, planetary-mass bodies are required in order to induce and maintain the collisional cascade. In our Solar System, the Asteroid Belt and the Kuiper Belt are well-separated debris belts that would be considered a tenuous debris disk if viewed from afar.

URI:	#DebrisDisk
Label:	Debris disk
Subclass of	#CircumstellarDisk
Paraphrase (experimental)	A #DebrisDisk is something that, amongst other things, is a #CircumstellarDisk

History

Class: DeltaCepheid

Definition: These are the classical cepheids, or Delta Cep-type variables. Comparatively young objects that have left the main sequence and evolved into the instability strip of the Hertzsprung-Russell (H-R) diagram, they obey the well-known Cepheid period-luminosity relation and belong to the young disk population. Delta Cep stars are present in open clusters. They display a certain relation between the shapes of their light curves and their periods. Sub-type: - These are Delta Cep variables having light amplitudes <0.5 mag in V (<0.7 mag in B) and almost symmetrical light curves (M-m approx. 0.4 - 0.5 periods); as a rule, their periods do not exceed 7 days. They are probably first-overtone pulsators and/or are in the first transition across the instability strip after leaving the main sequence (SU Cas). Traditionally, both Delta Cep and W Vir stars are quite often called Cepheids because it is often impossible to discriminate between them on the basis of the light curves for periods in the range 3 - 10 days. However, these are distinct groups of entirely different objects in different evolutionary stages. One of the significant spectral differences between W Vir stars and Cepheids is the presence, during a certain phase interval, of hydrogen-line emission in the former and of Ca II H and K emission in the latter.

URI:	#DeltaCepheid
Label:	Classical Cepheid (delta Cep type)
Label:	Classical Cepheid
Subclass of	#Cepheid
Paraphrase (experimental)	A #DeltaCepheid is something that, amongst other things, is a #Cepheid

History

Class: DeltaScuti

Definition: Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. Delta Sct stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables. Sub-type: - Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters.

URI:	#DeltaScuti
Label:	Variable Star of delta sct type
Label:	Delta Scuti Variable Star
Subclass of	#PulsatingStellarObject and #Star
Disjoint with	#BetaCephei, #Cepheid, #GammaDoradus, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae, #RVTauri, #TTauri and #WVirginisStar
Paraphrase (experimental)	A #DeltaScuti is something that, amongst other things, is a #PulsatingStellarObject and is a #Star but is not a #BetaCephei and is not a #Cepheid and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #TTauri and is not a #WVirginisStar

History

Class: Detached

Definition:

URI:	#Detached
Subclass of	#MorphologyCompoundObject
Disjoint with	#Close
Paraphrase (experimental)	A #Detached is something that, amongst other things, is a #MorphologyCompoundObject but is not a #Close

History

Class: Disk

Definition: Disk

URI:	#Disk
Label:	Disk
Subclass of	#AstroPortion
Paraphrase (experimental)	A #Disk is something that, amongst other things, is a #AstroPortion

History

Class: Distance

Definition:

URI:	#Distance
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Distance is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: DoubleStar

Definition: Double Star

URI:	#DoubleStar
Label:	A system of two stars
Label:	Double Star
Subclass of	#MultipleStar and (a composite term, see schema)
Paraphrase (experimental)	A #DoubleStar is something that, amongst other things, is a #MultipleStar and has no more than 2 #hasComponent property

History

Class: Dust

Definition: Dust

URI:	#Dust
Label:	Dust
Subclass of	#AstroPortion and (a composite term, see schema)
Paraphrase (experimental)	A #Dust is something that, amongst other things, is a #AstroPortion and has (a complex restriction, see schema)

History

Class: DwarfBarredSpiralGalaxy

Definition: Dwarf Barred Spiral Galaxy

URI:	#DwarfBarredSpiralGalaxy
Label:	Dwarf Barred Spiral Galaxy
Subclass of	#BarredSpiralGalaxy and #DwarfGalaxy
Paraphrase (experimental)	A #DwarfBarredSpiralGalaxy is something that, amongst other things, is a #BarredSpiralGalaxy and is a #DwarfGalaxy

History

Class: DwarfEllipticalGalaxy

Definition: Dwarf Elliptical Galaxy

URI:	#DwarfEllipticalGalaxy
Label:	Dwarf Elliptical Galaxy
Subclass of	#EllipticalGalaxy
Disjoint with	#GiantEllipticalGalaxy
Paraphrase (experimental)	A #DwarfEllipticalGalaxy is something that, amongst other things, is a #EllipticalGalaxy but is not a #GiantEllipticalGalaxy

History

Class: DwarfGalaxy

Definition: DWARF GALAXIES

URI:	#DwarfGalaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #DwarfGalaxy is something that, amongst other things, is a #Galaxy

History

Class: DwarfIrregularGalaxy

Definition: Dwarf Irregular Galaxy

URI:	#DwarfIrregularGalaxy
Label:	Dwarf Irregular Galaxy
Subclass of	#DwarfGalaxy and #IrregularGalaxy
Paraphrase (experimental)	A #DwarfIrregularGalaxy is something that, amongst other things, is a #DwarfGalaxy and is a #IrregularGalaxy

History

Class: DwarfNova

Definition: U Geminorum-type variables, quite often called dwarf novae. They are close binary systems consisting of a dwarf or subgiant K-M star that fills the volume of its inner Roche lobe and a white dwarf surrounded by an accretion disk. Orbital periods are in the range 0.05-0.5 days. Usually only small, in some cases rapid, light fluctuations are observed, but from time to time the brightness of a system increases rapidly by several magnitudes and, after an interval of from several days to a month or more, returns to the original state. Intervals between two consecutive outbursts for a given star may vary greatly, but every star is characterized by a certain mean value of these intervals, i.e., a mean cycle that corresponds to the mean light amplitude. The longer the cycle, the greater the amplitude. These systems are frequently sources of X-ray emission. The spectrum of a system at minimum is continuous, with broad H and He emission lines. At maximum these lines almost disappear or become shallow absorption lines. Some of these systems are eclipsing, possibly indicating that the primary minimum is caused by the eclipse of a hot spot that originates in the accretion disk from the infall of a gaseous stream from the K-M star. According to the characteristics of the light changes, U Gem variables may be subdivided into three types: SS Cyg, SU UMa, and Z Cam.

URI:	#DwarfNova
Label:	Dwarf Nova (U Geminorum-type variable star)
Label:	Dwarf Nova
Subclass of	#CataclysmicVariable
Disjoint with	#AMHerCataclysmicVariable, #DQHerCataclysmicVariable and #RSCanumVenaticorum
Paraphrase (experimental)	A #DwarfNova is something that, amongst other things, is a #CataclysmicVariable but is not a #AMHerCataclysmicVariable and is not a #DQHerCataclysmicVariable and is not a #RSCanumVenaticorum

History

Class: DwarfSpiralGalaxy

Definition: Dwarf Spiral Galaxy

URI:	#DwarfSpiralGalaxy
Label:	Dwarf Spiral Galaxy
Subclass of	#DwarfGalaxy and #SpiralGalaxy
Paraphrase (experimental)	A #DwarfSpiralGalaxy is something that, amongst other things, is a #DwarfGalaxy and is a #SpiralGalaxy

History

Class: DwarfStar

Definition: Dwarf

URI:	#DwarfStar
Label:	Star of Luminosity Class V
Label:	Dwarf
Subclass of	#Star
Paraphrase (experimental)	A #DwarfStar is something that, amongst other things, is a #Star

History

Class: EMSource

Definition: EM Source

URI:	#EMSource
Label:	EM Source
Subclass of	#AstrObject, (a composite term, see schema)
Disjoint with	#Unknown
Paraphrase (experimental)	A #EMSource is something that, amongst other things, is a #AstrObject and has (a complex restriction, see schema) but is not a #Unknown

History

Class: EMSpectrumRange

Definition: EM Spectrum Range

URI:	#EMSpectrumRange
Label:	Set of ranges in the electromagnetic spectrum
Label:	EM Spectrum Range
Disjoint with	#AstrObject, #AstroPortion, #AtomicElement, #ClassificationCategory, #Measurement, #Morphology and #Process
Paraphrase (experimental)	A #EMSpectrumRange is something that, amongst other things, is not a #AstrObject and is not a #AstroPortion and is not a #AtomicElement and is not a #ClassificationCategory and is not a #Measurement and is not a #Morphology and is not a #Process

History

Class: EarlyTypeStar

Definition: Early-type Star

URI:	#EarlyTypeStar
Label:	Star of the early spectral types
Label:	Early-type Star
Subclass of	#Star
Disjoint with	#FStar, #GStar and #LateTypeStar
Paraphrase (experimental)	A #EarlyTypeStar is something that, amongst other things, is a #Star but is not a #FStar and is not a #GStar and is not a #LateTypeStar

History

Class: Eclipse

Definition: Eclipse

URI:	#Eclipse
Label:	Eclipse
Subclass of	#Process
Paraphrase (experimental)	A #Eclipse is something that, amongst other things, is a #Process

History

Class: EclipseAlgol

Definition: Eclipse of Algol Type

URI:	#EclipseAlgol
Label:	Eclipse of Algol Type
Subclass of	#Eclipse, (a composite term, see schema)
Disjoint with	#EclipseBetaLyrae and #EclipseWUMa
Paraphrase (experimental)	A #EclipseAlgol is something that, amongst other things, is a #Eclipse and has (a complex restriction, see schema) but is not a #EclipseBetaLyrae and is not a #EclipseWUMa

History

Class: EclipseBetaLyrae

Definition: Eclipse of Beta Lyrae Typeeclipse##beta##lyrae##process##processes##betalyrae

URI:	#EclipseBetaLyrae
Label:	Eclipse of Beta Lyrae Type
Label:	eclipse##beta##lyrae##process##processes##betalyrae
Subclass of	#Eclipse, (a composite term, see schema)
Disjoint with	#EclipseAlgol and #EclipseWUMa
Paraphrase (experimental)	A #EclipseBetaLyrae is something that, amongst other things, is a #Eclipse and has (a complex restriction, see schema) but is not a #EclipseAlgol and is not a #EclipseWUMa

History

Class: EclipseWUMa

Definition: Eclipse of WUMa Type

URI:	#EclipseWUMa
Label:	Eclipse of WUMa Type
Subclass of	#Eclipse, (a composite term, see schema)
Disjoint with	#EclipseAlgol and #EclipseBetaLyrae
Paraphrase (experimental)	A #EclipseWUMa is something that, amongst other things, is a #Eclipse and has (a complex restriction, see schema) but is not a #EclipseAlgol and is not a #EclipseBetaLyrae

History

Class: EclipsingBinary

Definition: Binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion.

URI:	#EclipsingBinary
Label:	Eclipsing Binary
Subclass of	#DoubleStar, #VariableStellarObject, (a composite term, see schema)
Disjoint with	#CataclysmicVariable
Paraphrase (experimental)	A #EclipsingBinary is something that, amongst other things, is a #DoubleStar and is a #VariableStellarObject and has (a complex restriction, see schema) but is not a #CataclysmicVariable

History

Class: EclipsingBinaryAlgol

Definition: Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes.

URI:	#EclipsingBinaryAlgol
Label:	Eclipsing Binary of Algol type
Label:	Algol Eclipsing Binary
Subclass of	#EclipsingBinary
Disjoint with	#EclipsingBinaryBetaLyrae and #EclipsingBinaryWUMa
Paraphrase (experimental)	A #EclipsingBinaryAlgol is something that, amongst other things, is a #EclipsingBinary but is not a #EclipsingBinaryBetaLyrae and is not a #EclipsingBinaryWUMa

History

Class: EclipsingBinaryBetaLyrae

Definition: Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V.

URI:	#EclipsingBinaryBetaLyrae
Label:	Eclipsing Binary of Beta Lyr type
Label:	Beta Lyrae Eclipsing Binary
Subclass of	#EclipsingBinary
Disjoint with	#EclipsingBinaryAlgol and #EclipsingBinaryWUMa
Paraphrase (experimental)	A #EclipsingBinaryBetaLyrae is something that, amongst other things, is a #EclipsingBinary but is not a #EclipsingBinaryAlgol and is not a #EclipsingBinaryWUMa

History

Class: EclipsingBinaryWUMa

Definition: W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later.

URI:	#EclipsingBinaryWUMa
Label:	Eclipsing Binary of W UMa type
Label:	WUMa Eclipsing Binary
Subclass of	#EclipsingBinary
Disjoint with	#EclipsingBinaryAlgol and #EclipsingBinaryBetaLyrae
Paraphrase (experimental)	A #EclipsingBinaryWUMa is something that, amongst other things, is a #EclipsingBinary but is not a #EclipsingBinaryAlgol and is not a #EclipsingBinaryBetaLyrae

History

Class: EffectiveTemperature

Definition: Effective Temperature

URI:	#EffectiveTemperature
Label:	Effective Temperature
Subclass of	#Temperature, (composite term, see schema), (composite term, see schema), (a composite term, see schema)
Disjoint with	#ElectronTemperature
Paraphrase (experimental)	A #EffectiveTemperature is something that, amongst other things, is a #Temperature and something that, amongst other things, is a and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #ElectronTemperature

History

Class: ElectronTemperature

Definition: Electron Temperature

URI:	#ElectronTemperature
Label:	Electron Temperature
Subclass of	#Temperature and (a composite term, see schema)
Paraphrase (experimental)	A #ElectronTemperature is something that, amongst other things, is a #Temperature and has (a complex restriction, see schema)

History

Class: EllipsoidalVariableStar

Definition: Rotating ellipsoidal variables (b Per, Alpha Vir). These are close binary systems with ellipsoidal components, which change combined brightnesses with periods equal to those of orbital motion because of changes in emitting areas toward an observer, but showing no eclipses. Light amplitudes do not exceed 0.1 mag in V.

URI:	#EllipsoidalVariableStar
Label:	Ellipsoidal Variable Star
Subclass of	#DoubleStar and #RotationallyVariableStellarObject
Disjoint with	#TTauri
Paraphrase (experimental)	A #EllipsoidalVariableStar is something that, amongst other things, is a #DoubleStar and is a #RotationallyVariableStellarObject but is not a #TTauri

History

Class: EllipticalGalaxy

Definition: Elliptical Galaxy

URI:	#EllipticalGalaxy
Label:	Elliptical Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #EllipticalGalaxy is something that, amongst other things, is a #Galaxy

History

Class: Emission

Definition: Emission Process

URI:	#Emission
Label:	Emission Process
Subclass of	#Process
Paraphrase (experimental)	A #Emission is something that, amongst other things, is a #Process

History

Class: EmissionLineGalaxy

Definition: Emission-line Galaxy

URI:	#EmissionLineGalaxy
Label:	Emission-line Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #EmissionLineGalaxy is something that, amongst other things, is a #Galaxy

History

Class: EmissionLineStar

Definition: Emission-line Star

URI:	#EmissionLineStar
Label:	Emission-line Star
Subclass of	#PeculiarStar and (a composite term, see schema)
Paraphrase (experimental)	A #EmissionLineStar is something that, amongst other things, is a #PeculiarStar and has (a complex restriction, see schema)

History

Class: EmissionNebula

Definition: Emission Nebula

URI:	#EmissionNebula
Label:	Emission Nebula
Subclass of	#Nebula, (a composite term, see schema)
Disjoint with	#ReflectionNebula
Paraphrase (experimental)	A #EmissionNebula is something that, amongst other things, is a #Nebula and has (a complex restriction, see schema) but is not a #ReflectionNebula

History

Class: Envelope

Definition: Envelope

URI:	#Envelope
Label:	Envelope
Subclass of	#PortionOfStellarObject
Paraphrase (experimental)	A #Envelope is something that, amongst other things, is a #PortionOfStellarObject

History

Class: EquivalentWidth

Definition: Equivalent Width

URI:	#EquivalentWidth
Label:	Equivalent Width
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #EquivalentWidth is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: EruptiveVariableStellarObject

Definition: Eruptive variables are stars varying in brightness because of violent processes and flares occurring in their chromospheres and coronae. The light changes are usually accompanied by shell events or mass outflow in the form of stellar winds of variable intensity and/or by interaction with the surrounding interstellar medium.

URI:	#EruptiveVariableStellarObject
Label:	Eruptive Variable Star
Subclass of	#VariableStellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #EruptiveVariableStellarObject is something that, amongst other things, is a #VariableStellarObject and has (a complex restriction, see schema)

History

Class: Explosion

Definition: Explosion or Eruption process

URI:	#Explosion
Label:	Explosion or Eruption process
Label:	Explosion or Eruption process
Subclass of	#Process
Paraphrase (experimental)	A #Explosion is something that, amongst other things, is a #Process

History

Class: Extended

Definition: Extended

URI:	#Extended
Label:	Extended
Subclass of	#Morphology, (a composite term, see schema) and (composite term, see schema)
Disjoint with	#Compact
Paraphrase (experimental)	A #Extended is something that, amongst other things, is a #Morphology and has (a complex restriction, see schema) and something that, amongst other things, is a but is not a #Compact

History

Class: ExtremeUltraViolet

Definition: EXTREME ULTRAVIOLET RADIATION

URI:	#ExtremeUltraViolet
Subclass of	#UltraViolet
Disjoint with	#GammaRays, #Infrared, #Optical, #Radio and #XRays
Paraphrase (experimental)	A #ExtremeUltraViolet is something that, amongst other things, is a #UltraViolet but is not a #GammaRays and is not a #Infrared and is not a #Optical and is not a #Radio and is not a #XRays

History

Class: ExtremeUltraVioletSource

Definition:

URI:	#ExtremeUltraVioletSource
Subclass of	#UltraVioletSource
Paraphrase (experimental)	A #ExtremeUltraVioletSource is something that, amongst other things, is a #UltraVioletSource

History

Class: ExtremelyRedObject

Definition: Extremely Red Object

URI:	#ExtremelyRedObject
Label:	Extremely Red Object
Subclass of	#RedObject
Paraphrase (experimental)	A #ExtremelyRedObject is something that, amongst other things, is a #RedObject

History

Class: FDwarfStar

Definition: F DWARF STARS

URI:	#FDwarfStar
Subclass of	#DwarfStar and #FStar
Disjoint with	#ADwarfStar, #BDwarfStar, #FSubDwarfStar, #FSubGiantStar, #FSuperGiantStar and #GDwarfStar
Paraphrase (experimental)	A #FDwarfStar is something that, amongst other things, is a #DwarfStar and is a #FStar but is not a #ADwarfStar and is not a #BDwarfStar and is not a #FSubDwarfStar and is not a #FSubGiantStar and is not a #FSuperGiantStar and is not a #GDwarfStar

History

Class: FStar

Definition: F Star

URI:	#FStar
Label:	Star of Spectral Type F
Label:	F Star
Subclass of	#Star
Disjoint with	#EarlyTypeStar and #LateTypeStar
Paraphrase (experimental)	A #FStar is something that, amongst other things, is a #Star but is not a #EarlyTypeStar and is not a #LateTypeStar

History

Class: FSubDwarfStar

Definition: F SUBDWARF STARS

URI:	#FSubDwarfStar
Subclass of	#FStar and #SubDwarfStar
Disjoint with	#ASubDwarfStar, #BSubDwarfStar, #FDwarfStar, #FSubGiantStar, #FSuperGiantStar and #GSubDwarfStar
Paraphrase (experimental)	A #FSubDwarfStar is something that, amongst other things, is a #FStar and is a #SubDwarfStar but is not a #ASubDwarfStar and is not a #BSubDwarfStar and is not a #FDwarfStar and is not a #FSubGiantStar and is not a #FSuperGiantStar and is not a #GSubDwarfStar

History

Class: FSubGiantStar

Definition:

URI:	#FSubGiantStar
Subclass of	#FStar and #SubGiantStar
Disjoint with	#ASubGiantStar, #FDwarfStar, #FSubDwarfStar, #FSuperGiantStar and #GSubGiantStar
Paraphrase (experimental)	A #FSubGiantStar is something that, amongst other things, is a #FStar and is a #SubGiantStar but is not a #ASubGiantStar and is not a #FDwarfStar and is not a #FSubDwarfStar and is not a #FSuperGiantStar and is not a #GSubGiantStar

History

Class: FSuperGiantStar

Definition: F SUPERGIANT STARS

URI:	#FSuperGiantStar
Subclass of	#FStar and #SuperGiantStar
Disjoint with	#ASuperGiantStar, #BSuperGiant, #FDwarfStar, #FSubDwarfStar, #FSubGiantStar and #GSuperGiantStar
Paraphrase (experimental)	A #FSuperGiantStar is something that, amongst other things, is a #FStar and is a #SuperGiantStar but is not a #ASuperGiantStar and is not a #BSuperGiant and is not a #FDwarfStar and is not a #FSubDwarfStar and is not a #FSubGiantStar and is not a #GSuperGiantStar

History

Class: FUOrionis

Definition: Orion variables (eruptive) of the FU Orionis type. Characterized by gradual increases in brightness by about 6 mag in several months, followed by either almost complete constancy at maximum that is sustained for long periods of time or slow decline by 1-2 mag. Spectral types at maximum are in the range Ae(alpha) - Gpe(alpha). After an outburst, a gradual development of an emission spectrum is observed and the spectral type becomes later. These variables probably mark one of the evolutionary stages of T Tauri-type Orion variables, as evidenced by an outburst of one member, V1057 Cyg, but its decline (2.5 mag in 11 years) commenced immediately after maximum brightness was attained. All presently known FU Ori variables are coupled with reflecting cometary nebulae.

URI:	#FUOrionis
Label:	Variable Star of FU Ori type
Label:	FU Orionis Variable Star
Subclass of	#OrionVariableStar
Disjoint with	#TTauri
Paraphrase (experimental)	A #FUOrionis is something that, amongst other things, is a #OrionVariableStar but is not a #TTauri

History

Class: FanaroffRileyTypeI

Definition: Fanaroff-Riley Type-1 Object

URI:	#FanaroffRileyTypeI
Label:	Fanaroff-Riley Type I, which is a Type2 Active Galactic Nucleus
Label:	Fanaroff-Riley Type-1 Object
Subclass of	#LowPowerRadioLoudAGN
Disjoint with	#BLLacertae
Paraphrase (experimental)	A #FanaroffRileyTypeI is something that, amongst other things, is a #LowPowerRadioLoudAGN but is not a #BLLacertae

History

Class: FanaroffRileyTypeII

Definition: Fanaroff-Riley type 2

URI:	#FanaroffRileyTypeII
Label:	Fanaroff-Riley type II, which is a Type2 Active Galactic Nucleus
Label:	Fanaroff-Riley type 2
Subclass of	#HighPowerRadioLoudAGN
Disjoint with	#FlatSpectrumRadioQuasar and #SteepSpectrumRadioQuasar
Paraphrase (experimental)	A #FanaroffRileyTypeII is something that, amongst other things, is a #HighPowerRadioLoudAGN but is not a #FlatSpectrumRadioQuasar and is not a #SteepSpectrumRadioQuasar

History

Class: FarInfrared

Definition: Far Infrared

URI:	#FarInfrared
Label:	Wavelength above 30 microns
Label:	Far Infrared
Subclass of	#Infrared
Disjoint with	#NearInfrared
Paraphrase (experimental)	A #FarInfrared is something that, amongst other things, is a #Infrared but is not a #NearInfrared

History

Class: FarInfraredSource

Definition: Far-IR Source

URI:	#FarInfraredSource
Label:	Far-IR Source
Subclass of	#InfraredSource and (a composite term, see schema)
Paraphrase (experimental)	A #FarInfraredSource is something that, amongst other things, is a #InfraredSource and has (a complex restriction, see schema)

History

Class: FlareStar

Definition: Eruptive variables varying in brightness because of flares occurring in their chromospheres and coronae. Sub-types: - Orion variables of late (K-M) spectral types - Eruptive variables of the UV Ceti type, these are K Ve-M Ve stars sometimes displaying flare activity with amplitudes from several tenths of a magnitude up to 6 mag in V. The amplitude is considerably greater in the ultraviolet spectral region. Maximum light is attained in several seconds or dozens of seconds after the beginning of a flare; the star returns to its normal brightness in several minutes or dozens of minutes. - Flaring Orion variables of spectral types Ke-Me. These are phenomenologically almost identical to UV Cet variables observed in the solar neighborhood. In addition to being related to nebulae, they are normally characterized by being of earlier spectral type and greater luminosity, with slower development of flares (V389 Ori). - BY Draconis-type (rotating) variables, which are emission-line dwarfs of dKe-dMe spectral type showing quasiperiodic light changes with periods from a fraction of a day to 120 days and amplitudes from several hundredths to 0.5 mag in V. The light variability is caused by axial rotation of a star with a variable degree of nonuniformity of the surface brightness (spots) and chromospheric activity. Some of these stars also show flares similar to those of UV Cet stars, and in those cases they also belong to the latter type and are simultaneously considered eruptive variables.

URI:	#FlareStar
Label:	Flare Star
Label:	Flare Star
Subclass of	#DwarfStar, #EruptiveVariableStellarObject and #LateTypeStar
Disjoint with	#GammaDoradus and #RCoronaeBorealis
Paraphrase (experimental)	A #FlareStar is something that, amongst other things, is a #DwarfStar and is a #EruptiveVariableStellarObject and is a #LateTypeStar but is not a #GammaDoradus and is not a #RCoronaeBorealis

History

Class: FlatSpectrumRadioQuasar

Definition: Flat-Spectrum Radio Quasar

URI:	#FlatSpectrumRadioQuasar
Label:	Flat-Spectrum Radio Quasar, which is a Type1 active galactic nucleus
Label:	Flat-Spectrum Radio Quasar
Subclass of	#HighPowerRadioLoudAGN
Disjoint with	#FanaroffRileyTypeII and #SteepSpectrumRadioQuasar
Paraphrase (experimental)	A #FlatSpectrumRadioQuasar is something that, amongst other things, is a #HighPowerRadioLoudAGN but is not a #FanaroffRileyTypeII and is not a #SteepSpectrumRadioQuasar

History

Class: Flux

Definition: Flux

URI:	#Flux
Label:	Flux
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Flux is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: FluxAmplitudeVariation

Definition: Flux Amplitude Variation

URI:	#FluxAmplitudeVariation
Label:	Flux Amplitude Variation
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #FluxAmplitudeVariation is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: FluxRatio

Definition: Flux Ratio

URI:	#FluxRatio
Label:	Flux Ratio
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #FluxRatio is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: FluxRatio_Radio5Ghz_Optical

Definition: Flux Ration Radio5Ghz-Optical

URI:	#FluxRatio_Radio5Ghz_Optical
Label:	Flux Ration Radio5Ghz-Optical
Subclass of	#FluxRatio
Paraphrase (experimental)	A #FluxRatio_Radio5Ghz_Optical is something that, amongst other things, is a #FluxRatio

History

Class: GDwarfStar

Definition: G Dwarf Star

URI:	#GDwarfStar
Label:	G Dwarf Star
Subclass of	#DwarfStar and #GStar
Disjoint with	#ADwarfStar, #BDwarfStar, #FDwarfStar, #GGiantStars, #GSubDwarfStar, #GSubGiantStar and #GSuperGiantStar
Paraphrase (experimental)	A #GDwarfStar is something that, amongst other things, is a #DwarfStar and is a #GStar but is not a #ADwarfStar and is not a #BDwarfStar and is not a #FDwarfStar and is not a #GGiantStars and is not a #GSubDwarfStar and is not a #GSubGiantStar and is not a #GSuperGiantStar

History

Class: GGiantStars

Definition: G Giant Star

URI:	#GGiantStars
Label:	G Giant Star
Subclass of	#GStar and #GiantStar
Disjoint with	#AGiantStar, #BGiantStar, #GDwarfStar, #GSubDwarfStar, #GSubGiantStar and #GSuperGiantStar
Paraphrase (experimental)	A #GGiantStars is something that, amongst other things, is a #GStar and is a #GiantStar but is not a #AGiantStar and is not a #BGiantStar and is not a #GDwarfStar and is not a #GSubDwarfStar and is not a #GSubGiantStar and is not a #GSuperGiantStar

History

Class: GStar

Definition: G Star

URI:	#GStar
Label:	Star of Spectral Type G
Label:	G Star
Subclass of	#Star
Disjoint with	#EarlyTypeStar and #LateTypeStar
Paraphrase (experimental)	A #GStar is something that, amongst other things, is a #Star but is not a #EarlyTypeStar and is not a #LateTypeStar

History

Class: GSubDwarfStar

Definition: G SUBDWARF STARS

URI:	#GSubDwarfStar
Subclass of	#GStar and #SubDwarfStar
Disjoint with	#ASubDwarfStar, #BSubDwarfStar, #FSubDwarfStar, #GDwarfStar, #GGiantStars, #GSubGiantStar and #GSuperGiantStar
Paraphrase (experimental)	A #GSubDwarfStar is something that, amongst other things, is a #GStar and is a #SubDwarfStar but is not a #ASubDwarfStar and is not a #BSubDwarfStar and is not a #FSubDwarfStar and is not a #GDwarfStar and is not a #GGiantStars and is not a #GSubGiantStar and is not a #GSuperGiantStar

History

Class: GSubGiantStar

Definition: G Subgiant Star

URI:	#GSubGiantStar
Label:	G Subgiant Star
Subclass of	#GStar and #SubGiantStar
Disjoint with	#ASubGiantStar, #FSubGiantStar, #GDwarfStar, #GGiantStars, #GSubDwarfStar and #GSuperGiantStar
Paraphrase (experimental)	A #GSubGiantStar is something that, amongst other things, is a #GStar and is a #SubGiantStar but is not a #ASubGiantStar and is not a #FSubGiantStar and is not a #GDwarfStar and is not a #GGiantStars and is not a #GSubDwarfStar and is not a #GSuperGiantStar

History

Class: GSuperGiantStar

Definition: G Supergiant Star

URI:	#GSuperGiantStar
Label:	G Supergiant Star
Subclass of	#GStar and #SuperGiantStar
Disjoint with	#ASuperGiantStar, #BSuperGiant, #FSuperGiantStar, #GDwarfStar, #GGiantStars, #GSubDwarfStar and #GSubGiantStar
Paraphrase (experimental)	A #GSuperGiantStar is something that, amongst other things, is a #GStar and is a #SuperGiantStar but is not a #ASuperGiantStar and is not a #BSuperGiant and is not a #FSuperGiantStar and is not a #GDwarfStar and is not a #GGiantStars and is not a #GSubDwarfStar and is not a #GSubGiantStar

History

Class: GalaxiesCompactGroup

Definition: Compact Group of Galaxies

URI:	#GalaxiesCompactGroup
Label:	Compact Group of Galaxies
Subclass of	#GalaxiesGroup and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxiesCompactGroup is something that, amongst other things, is a #GalaxiesGroup and has (a complex restriction, see schema)

History

Class: GalaxiesGroup

Definition: Group of Galaxies

URI:	#GalaxiesGroup
Label:	Group of Galaxies
Subclass of	#CompoundObject, (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #Galaxy, #GalaxyPair, #LINER, #MultipleStar, #PlanetaryNebula, #StellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #GalaxiesGroup is something that, amongst other things, is a #CompoundObject and has (a complex restriction, see schema) but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #Galaxy and is not a #GalaxyPair and is not a #LINER and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject and is not a #SuperClusterOfGalaxies

History

Class: Galaxy

Definition: Galaxy

URI:	#Galaxy
Label:	Galaxy
Subclass of	#CompoundObject
Disjoint with	#AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #GalaxyPair, #MultipleStar, #PlanetaryNebula, #StellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #Galaxy is something that, amongst other things, is a #CompoundObject but is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #GalaxyPair and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject and is not a #SuperClusterOfGalaxies

History

Class: GalaxyInCluster

Definition: Galaxy in Cluster

URI:	#GalaxyInCluster
Label:	Galaxy in a Cluster of Galaxies
Label:	Galaxy in Cluster
Subclass of	#Galaxy and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyInCluster is something that, amongst other things, is a #Galaxy and has (a complex restriction, see schema)

History

Class: GalaxyInGroup

Definition: Galaxy in Group

URI:	#GalaxyInGroup
Label:	Galaxy in a Group of Galaxies
Label:	Galaxy in Group
Subclass of	#Galaxy and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyInGroup is something that, amongst other things, is a #Galaxy and has (a complex restriction, see schema)

History

Class: GalaxyInPair

Definition: Galaxy in Pair

URI:	#GalaxyInPair
Label:	Galaxy in Pair
Subclass of	#Galaxy and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyInPair is something that, amongst other things, is a #Galaxy and has (a complex restriction, see schema)

History

Class: GalaxyMorphology

Definition: Galaxy Morphology

URI:	#GalaxyMorphology
Label:	Galaxy Morphology
Subclass of	#Morphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphology is something that, amongst other things, is a #Morphology and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyBarredSpiral

Definition:

URI:	#GalaxyMorphologyBarredSpiral
Subclass of	#GalaxyMorphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyBarredSpiral is something that, amongst other things, is a #GalaxyMorphology and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyDwarf

Definition:

URI:	#GalaxyMorphologyDwarf
Subclass of	#GalaxyMorphology
Paraphrase (experimental)	A #GalaxyMorphologyDwarf is something that, amongst other things, is a #GalaxyMorphology

History

Class: GalaxyMorphologyDwarfBarredSpiral

Definition:

URI:	#GalaxyMorphologyDwarfBarredSpiral
Subclass of	#GalaxyMorphologyBarredSpiral, #GalaxyMorphologyDwarf and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyDwarfBarredSpiral is something that, amongst other things, is a #GalaxyMorphologyBarredSpiral and is a #GalaxyMorphologyDwarf and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyDwarfElliptical

Definition:

URI:	#GalaxyMorphologyDwarfElliptical
Subclass of	#GalaxyMorphologyDwarf, #GalaxyMorphologyElliptical, (a composite term, see schema)
Disjoint with	#GalaxyMorphologyGiantElliptical
Paraphrase (experimental)	A #GalaxyMorphologyDwarfElliptical is something that, amongst other things, is a #GalaxyMorphologyDwarf and is a #GalaxyMorphologyElliptical and has (a complex restriction, see schema) but is not a #GalaxyMorphologyGiantElliptical

History

Class: GalaxyMorphologyDwarfIrregular

Definition:

URI:	#GalaxyMorphologyDwarfIrregular
Subclass of	#GalaxyMorphologyDwarf, #GalaxyMorphologyIrregular and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyDwarfIrregular is something that, amongst other things, is a #GalaxyMorphologyDwarf and is a #GalaxyMorphologyIrregular and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyDwarfSpiral

Definition:

URI:	#GalaxyMorphologyDwarfSpiral
Subclass of	#GalaxyMorphologyDwarf, #GalaxyMorphologySpiral, (a composite term, see schema)
Disjoint with	#GalaxyMorphologyRing
Paraphrase (experimental)	A #GalaxyMorphologyDwarfSpiral is something that, amongst other things, is a #GalaxyMorphologyDwarf and is a #GalaxyMorphologySpiral and has (a complex restriction, see schema) but is not a #GalaxyMorphologyRing

History

Class: GalaxyMorphologyElliptical

Definition:

URI:	#GalaxyMorphologyElliptical
Subclass of	#GalaxyMorphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyElliptical is something that, amongst other things, is a #GalaxyMorphology and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyGiant

Definition:

URI:	#GalaxyMorphologyGiant
Subclass of	#GalaxyMorphology
Paraphrase (experimental)	A #GalaxyMorphologyGiant is something that, amongst other things, is a #GalaxyMorphology

History

Class: GalaxyMorphologyGiantElliptical

Definition:

URI:	#GalaxyMorphologyGiantElliptical
Subclass of	#GalaxyMorphologyElliptical, #GalaxyMorphologyGiant and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyGiantElliptical is something that, amongst other things, is a #GalaxyMorphologyElliptical and is a #GalaxyMorphologyGiant and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyIrregular

Definition:

URI:	#GalaxyMorphologyIrregular
Subclass of	#GalaxyMorphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyIrregular is something that, amongst other things, is a #GalaxyMorphology and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyLenticular

Definition:

URI:	#GalaxyMorphologyLenticular
Subclass of	#GalaxyMorphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyLenticular is something that, amongst other things, is a #GalaxyMorphology and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyPeculiar

Definition:

URI:	#GalaxyMorphologyPeculiar
Subclass of	#GalaxyMorphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyPeculiar is something that, amongst other things, is a #GalaxyMorphology and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyPolarRing

Definition:

URI:	#GalaxyMorphologyPolarRing
Subclass of	#GalaxyMorphologyRing and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyPolarRing is something that, amongst other things, is a #GalaxyMorphologyRing and has (a complex restriction, see schema)

History

Class: GalaxyMorphologyRing

Definition:

URI:	#GalaxyMorphologyRing
Subclass of	#GalaxyMorphologyLenticular, #GalaxyMorphologySpiral and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologyRing is something that, amongst other things, is a #GalaxyMorphologyLenticular and is a #GalaxyMorphologySpiral and has (a complex restriction, see schema)

History

Class: GalaxyMorphologySpiral

Definition:

URI:	#GalaxyMorphologySpiral
Subclass of	#GalaxyMorphology and (a composite term, see schema)
Paraphrase (experimental)	A #GalaxyMorphologySpiral is something that, amongst other things, is a #GalaxyMorphology and has (a complex restriction, see schema)

History

Class: GalaxyPair

Definition: Galaxy Pair

URI:	#GalaxyPair
Label:	Galaxy Pair
Subclass of	#CompoundObject, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #MultipleStar, #PlanetaryNebula, #StellarObject and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #GalaxyPair is something that, amongst other things, is a #CompoundObject and has no more than 2 #hasComponent property and has (a complex restriction, see schema) but is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject and is not a #SuperClusterOfGalaxies

History

Class: GammaDoradus

Definition: Gamma Doradus variables are variable stars which display variations in luminosity due to non-radial pulsations of their surface. The stars are typically young, early F or late A type main sequence stars, and typical brightness fluctuations are 0.1 magnitudes with periods on the order of one day. This is a relatively new class of variable stars, having been first characterised in the second half of the 1990s, and details on the underlying physical cause of the variations remains under investigation.

URI:	#GammaDoradus
Label:	Variable Star of gamma Dor type
Label:	Gamma Doradus Variable
Subclass of	#DwarfStar and #PulsatingStellarObject
Disjoint with	#Alpha2CanumVenaticorum, #BYDraconis, #BetaCephei, #Cepheid, #DeltaScuti, #FlareStar, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae, #RVTauri and #WVirginisStar
Paraphrase (experimental)	A #GammaDoradus is something that, amongst other things, is a #DwarfStar and is a #PulsatingStellarObject but is not a #Alpha2CanumVenaticorum and is not a #BYDraconis and is not a #BetaCephei and is not a #Cepheid and is not a #DeltaScuti and is not a #FlareStar and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #WVirginisStar

History

Class: GammaRaySource

Definition: Gamma-ray Source

URI:	#GammaRaySource
Label:	Gamma-ray Source
Subclass of	#EMSource and (a composite term, see schema)
Paraphrase (experimental)	A #GammaRaySource is something that, amongst other things, is a #EMSource and has (a complex restriction, see schema)

History

Class: GammaRays

Definition: Gamma Rays

URI:	#GammaRays
Label:	Gamma Rays
Subclass of	#EMSpectrumRange
Disjoint with	#Infrared, #Optical, #Radio, #UltraViolet and #XRays
Paraphrase (experimental)	A #GammaRays is something that, amongst other things, is a #EMSpectrumRange but is not a #Infrared and is not a #Optical and is not a #Radio and is not a #UltraViolet and is not a #XRays

History

Class: GiantEllipticalGalaxy

Definition: Giant Elliptical Galaxy

URI:	#GiantEllipticalGalaxy
Label:	Giant Elliptical Galaxy
Subclass of	#EllipticalGalaxy and #GiantGalaxy
Paraphrase (experimental)	A #GiantEllipticalGalaxy is something that, amongst other things, is a #EllipticalGalaxy and is a #GiantGalaxy

History

Class: GiantGalaxy

Definition: GIANT GALAXIES

URI:	#GiantGalaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #GiantGalaxy is something that, amongst other things, is a #Galaxy

History

Class: GiantStar

Definition: Giant

URI:	#GiantStar
Label:	Star of Luminosity Class III
Label:	Giant
Subclass of	#Star
Paraphrase (experimental)	A #GiantStar is something that, amongst other things, is a #Star

History

Class: GlobularCluster

Definition: Globular Cluster

URI:	#GlobularCluster
Label:	Globular Cluster
Subclass of	#ClusterOfStars
Disjoint with	#OpenCluster
Paraphrase (experimental)	A #GlobularCluster is something that, amongst other things, is a #ClusterOfStars but is not a #OpenCluster

History

Class: HIIGalaxy

Definition: HII Galaxy

URI:	#HIIGalaxy
Label:	HII Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #HIIGalaxy is something that, amongst other things, is a #Galaxy

History

Class: HIIRegion

Definition: HII Region

URI:	#HIIRegion
Label:	HII (inonized) region
Label:	HII Region
Subclass of	#EmissionNebula, #RadioSource, (a composite term, see schema)
Disjoint with	#HIRegion, #MolecularCloud, #PlanetaryNebulaShell, #Pulsar, #RadioGalaxy, #RadioLoudAGN, #StarburstGalaxy, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #HIIRegion is something that, amongst other things, is a #EmissionNebula and is a #RadioSource and has (a complex restriction, see schema) but is not a #HIRegion and is not a #MolecularCloud and is not a #PlanetaryNebulaShell and is not a #Pulsar and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: HIRegion

Definition: HI Region

URI:	#HIRegion
Label:	HI (neutral) region
Label:	HI Region
Subclass of	#Cloud and #RadioSource
Disjoint with	#HIIRegion, #MolecularCloud, #Pulsar, #RadioGalaxy, #RadioLoudAGN, #StarburstGalaxy, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #HIRegion is something that, amongst other things, is a #Cloud and is a #RadioSource but is not a #HIIRegion and is not a #MolecularCloud and is not a #Pulsar and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: HIRegionCold

Definition: Cold HI Region

URI:	#HIRegionCold
Label:	Cold HI Region
Subclass of	#HIRegion
Disjoint with	#HIRegionWarm
Paraphrase (experimental)	A #HIRegionCold is something that, amongst other things, is a #HIRegion but is not a #HIRegionWarm

History

Class: HIRegionWarm

Definition: HI Region Warm

URI:	#HIRegionWarm
Label:	HI Region Warm
Subclass of	#HIRegion
Disjoint with	#HIRegionCold
Paraphrase (experimental)	A #HIRegionWarm is something that, amongst other things, is a #HIRegion but is not a #HIRegionCold

History

Class: HLineEmission

Definition: 21 CM LINE

URI:	#HLineEmission
Subclass of	#LineEmission
Paraphrase (experimental)	A #HLineEmission is something that, amongst other things, is a #LineEmission

History

Class: Halo

Definition: Halo

URI:	#Halo
Label:	Halo
Subclass of	#PortionOfGalaxy
Disjoint with	#OldDisk and #SpiralArm
Paraphrase (experimental)	A #Halo is something that, amongst other things, is a #PortionOfGalaxy but is not a #OldDisk and is not a #SpiralArm

History

Class: HerbigHaro

Definition: Herbig Ae/Be Stars (NC) 1. Observational, a category of spectral type A and B stars that exhibit properties similar to those of CTTS: strong optical emission lines and infrared to millimeter excesses consistent with disk emission. 2. (Orig.) Observational, Herbig (1962) first drew attention to a set of early type objects with emission lines, associated with localized nebulosity and larger scale dark clouds. As is the case for CTTS/WTTS, the original classification implied nothing about the presence of disks, though disks were later recognized as the physical driver for many of the observational characteristics. Description: These systems are interpreted as pre-main sequence and zero-age main sequence objects, with ages comparable to CTTS and WTTS but larger masses, 2 < M∗/M⊙ < 10. They are often referred to as just “Herbig Stars”.

URI:	#HerbigHaro
Label:	Herbig star
Subclass of	#EarlyTypeStar, #TTauri and (composite term, see schema)
Disjoint with	#BetaCephei, #ClassicalTTauri and #WeakLineTTauri
Paraphrase (experimental)	A #HerbigHaro is something that, amongst other things, is a #EarlyTypeStar and is a #TTauri and something that, amongst other things, is a but is not a #BetaCephei and is not a #ClassicalTTauri and is not a #WeakLineTTauri

History

Class: HighMassStar

Definition: High-mass Star

URI:	#HighMassStar
Label:	High-mass Star
Subclass of	#Star
Paraphrase (experimental)	A #HighMassStar is something that, amongst other things, is a #Star

History

Class: HighMassXrayBinary

Definition: A high-mass X-ray binary (HMXB) is a binary star system where one of the components is a neutron star or a black hole. The other component is a massive star, usually a Be star or a blue supergiant. A fraction of the stellar wind of the companion star is captured by the compact star, and produces X-rays as it falls onto the compact object. In HMXB, the massive star dominates the emission of optical light. The compact object is the dominant source of X-rays. The massive stars are very luminous and therefore easily detected. One of the most famous HMXB is Cygnus X-1 which was the first stellar-mass black hole discovered. Soft-gamma rays emitters.

URI:	#HighMassXrayBinary
Label:	High-mass X-ray Binary
Subclass of	#GammaRaySource, #XRayBinary, (a composite term, see schema)
Disjoint with	#LowMassXRayBinary and #Magnetar
Paraphrase (experimental)	A #HighMassXrayBinary is something that, amongst other things, is a #GammaRaySource and is a #XRayBinary and has (a complex restriction, see schema) but is not a #LowMassXRayBinary and is not a #Magnetar

History

Class: HighPowerRadioLoudAGN

Definition: High-power Radio-loud AGN

URI:	#HighPowerRadioLoudAGN
Label:	High-power Radio-loud AGN
Subclass of	#RadioLoudAGN
Paraphrase (experimental)	A #HighPowerRadioLoudAGN is something that, amongst other things, is a #RadioLoudAGN

History

Class: HighPowerRadioQuietAGN_QSO

Definition: High-power Radio-quiet AGN

URI:	#HighPowerRadioQuietAGN_QSO
Label:	High-power Radio-quiet AGN
Subclass of	#RadioQuietAGN, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#LowPowerRadioQuietAGN_Seyfert
Paraphrase (experimental)	A #HighPowerRadioQuietAGN_QSO is something that, amongst other things, is a #RadioQuietAGN and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #LowPowerRadioQuietAGN_Seyfert

History

Class: HighProperMotionStar

Definition: High-proper motion Star

URI:	#HighProperMotionStar
Label:	High-proper motion Star
Subclass of	#HighVelocityStar and (a composite term, see schema)
Paraphrase (experimental)	A #HighProperMotionStar is something that, amongst other things, is a #HighVelocityStar and has (a complex restriction, see schema)

History

Class: HighRedshiftGalaxy

Definition: Galaxy with High Redshift

URI:	#HighRedshiftGalaxy
Label:	Galaxy with High Redshift
Subclass of	#Galaxy
Paraphrase (experimental)	A #HighRedshiftGalaxy is something that, amongst other things, is a #Galaxy

History

Class: HighVelocityCloud

Definition: High-velocity Cloud

URI:	#HighVelocityCloud
Label:	HVC (High Velocity Cloud)
Label:	High-velocity Cloud
Subclass of	#Cloud and (a composite term, see schema)
Paraphrase (experimental)	A #HighVelocityCloud is something that, amongst other things, is a #Cloud and has (a complex restriction, see schema)

History

Class: HighVelocityStar

Definition: High-velocity Star

URI:	#HighVelocityStar
Label:	High-velocity Star
Subclass of	#PeculiarStar and (a composite term, see schema)
Paraphrase (experimental)	A #HighVelocityStar is something that, amongst other things, is a #PeculiarStar and has (a complex restriction, see schema)

History

Class: HorizontalBranchStar

Definition: Horizontal-branch Star

URI:	#HorizontalBranchStar
Label:	Horizontal-branch Star
Subclass of	#PeculiarStar
Paraphrase (experimental)	A #HorizontalBranchStar is something that, amongst other things, is a #PeculiarStar

History

Class: InclinationWrtLOS

Definition:

URI:	#InclinationWrtLOS
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #InclinationWrtLOS is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: Infrared

Definition: Infrared

URI:	#Infrared
Label:	Infrared
Subclass of	#EMSpectrumRange
Disjoint with	#GammaRays, #Optical, #Radio, #UltraViolet and #XRays
Paraphrase (experimental)	A #Infrared is something that, amongst other things, is a #EMSpectrumRange but is not a #GammaRays and is not a #Optical and is not a #Radio and is not a #UltraViolet and is not a #XRays

History

Class: InfraredSource

Definition: Infrared Source

URI:	#InfraredSource
Label:	Infrared Source
Subclass of	#EMSource and (a composite term, see schema)
Paraphrase (experimental)	A #InfraredSource is something that, amongst other things, is a #EMSource and has (a complex restriction, see schema)

History

Class: InterStellarMedium

Definition: ISM

URI:	#InterStellarMedium
Label:	ISM
Subclass of	#AstrObject
Disjoint with	#StellarObject, #SubStellarObject, #SupermassiveBlackHole, #Unknown and #VariableStellarObject
Paraphrase (experimental)	A #InterStellarMedium is something that, amongst other things, is a #AstrObject but is not a #StellarObject and is not a #SubStellarObject and is not a #SupermassiveBlackHole and is not a #Unknown and is not a #VariableStellarObject

History

Class: InteractingGalaxy

Definition: galaxy in strong interaction with others (within a pair or a group)

URI:	#InteractingGalaxy
Label:	Interacting Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #InteractingGalaxy is something that, amongst other things, is a #Galaxy

History

Class: IrregularGalaxy

Definition: Irregular Galaxy

URI:	#IrregularGalaxy
Label:	Irregular Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #IrregularGalaxy is something that, amongst other things, is a #Galaxy

History

Class: IrregularVariableStellarObject

Definition: Stars showing variations of irregular (non-periodic) type. Mostly (?) of eruptive type.

URI:	#IrregularVariableStellarObject
Label:	Variable Star of Irregular type
Label:	Irregular Variable Star
Subclass of	#VariableStellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #IrregularVariableStellarObject is something that, amongst other things, is a #VariableStellarObject and has (a complex restriction, see schema)

History

Class: Jet

Definition: Jet

URI:	#Jet
Label:	Jet
Subclass of	#AstroPortion and (a composite term, see schema)
Paraphrase (experimental)	A #Jet is something that, amongst other things, is a #AstroPortion and has (a complex restriction, see schema)

History

Class: KStar

Definition: K Star

URI:	#KStar
Label:	Star of Spectral Type K
Label:	K Star
Subclass of	#LateTypeStar
Paraphrase (experimental)	A #KStar is something that, amongst other things, is a #LateTypeStar

History

Class: LINER

Definition: LINER AGN

URI:	#LINER
Label:	LINER-type Active Galaxy Nucleus
Label:	LINER AGN
Subclass of	#AGN
Paraphrase (experimental)	A #LINER is something that, amongst other things, is a #AGN

History

Class: LTypeIrregularStar

Definition: L-type Irregular Star

URI:	#LTypeIrregularStar
Label:	L-type Irregular Star
Subclass of	#LongPeriodVariable
Disjoint with	#MiraCeti and #SemiRegularPulsatingStar
Paraphrase (experimental)	A #LTypeIrregularStar is something that, amongst other things, is a #LongPeriodVariable but is not a #MiraCeti and is not a #SemiRegularPulsatingStar

History

Class: LargeSeparationRadioLobes

Definition: Large Separation Lobes

URI:	#LargeSeparationRadioLobes
Label:	Large Separation Lobes
Subclass of	#Morphology, (a composite term, see schema) and (composite term, see schema)
Disjoint with	#SmallSeparationRadioLobes
Paraphrase (experimental)	A #LargeSeparationRadioLobes is something that, amongst other things, is a #Morphology and has (a complex restriction, see schema) and something that, amongst other things, is a but is not a #SmallSeparationRadioLobes

History

Class: LateTypeStar

Definition: Late-type Star

URI:	#LateTypeStar
Label:	Star of the late spectral types
Label:	Late-type Star
Subclass of	#Star
Disjoint with	#EarlyTypeStar, #FStar and #GStar
Paraphrase (experimental)	A #LateTypeStar is something that, amongst other things, is a #Star but is not a #EarlyTypeStar and is not a #FStar and is not a #GStar

History

Class: LensedGalaxy

Definition: Lensed Galaxy

URI:	#LensedGalaxy
Label:	Gravitationnaly Lensed Image of a Galaxy
Label:	Lensed Galaxy
Subclass of	#Galaxy and (a composite term, see schema)
Paraphrase (experimental)	A #LensedGalaxy is something that, amongst other things, is a #Galaxy and has (a complex restriction, see schema)

History

Class: LensedQuasiStellarObject

Definition: Lensed Quasar

URI:	#LensedQuasiStellarObject
Label:	Gravitationnaly Lensed Image of a Quasar
Label:	Lensed Quasar
Subclass of	#HighPowerRadioQuietAGN_QSO and (a composite term, see schema)
Paraphrase (experimental)	A #LensedQuasiStellarObject is something that, amongst other things, is a #HighPowerRadioQuietAGN_QSO and has (a complex restriction, see schema)

History

Class: Lensing

Definition: Lensing Process

URI:	#Lensing
Label:	Lensing Process
Subclass of	#Process
Paraphrase (experimental)	A #Lensing is something that, amongst other things, is a #Process

History

Class: LenticularGalaxy

Definition: Lenticular Galaxy

URI:	#LenticularGalaxy
Label:	Lenticular Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #LenticularGalaxy is something that, amongst other things, is a #Galaxy

History

Class: LightCurve

Definition: Light Curve

URI:	#LightCurve
Label:	Light Curve
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #LightCurve is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: LineEmission

Definition: Line Emission

URI:	#LineEmission
Label:	Line Emission
Subclass of	#Emission
Paraphrase (experimental)	A #LineEmission is something that, amongst other things, is a #Emission

History

Class: LineWidth

Definition: Line Width

URI:	#LineWidth
Label:	Line Width
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #LineWidth is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: LobeDominated

Definition: Lobe Dominated

URI:	#LobeDominated
Label:	Core/Extended Flux Ratio < 1)
Label:	Lobe Dominated
Subclass of	#Morphology, (composite term, see schema), (a composite term, see schema)
Disjoint with	#CoreDominated
Paraphrase (experimental)	A #LobeDominated is something that, amongst other things, is a #Morphology and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #CoreDominated

History

Class: LongPeriodVariable

Definition: Long-period Variable

URI:	#LongPeriodVariable
Label:	Long-period Variable
Subclass of	#LateTypeStar, #PulsatingStellarObject and (composite term, see schema)
Disjoint with	#PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae, #RVTauri and #WVirginisStar
Paraphrase (experimental)	A #LongPeriodVariable is something that, amongst other things, is a #LateTypeStar and is a #PulsatingStellarObject and something that, amongst other things, is a but is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #WVirginisStar

History

Class: LowMassXRayBinary

Definition: Low-mass X-ray binaries (LMXBs) are binary stars where one of the components is either a black hole or neutron star. The other component (donor) is usually filling its Roche lobe and therefore transfers mass to the compact star. The donor is less massive than the compact object, and can be on the main sequence, a degenerate dwarf (white dwarf), or an evolved star (red giant). Found in the Milky Way, external galaxies, and in globular clusters. A typical LMXB emits almost all of its radiation in X-rays, and typically less than one percent in visible light, so they are among the brightest objects in the X-ray sky, but relatively faint in visible light. The apparent magnitude is typically around 15 to 20. The brightest part of the system is the accretion disk around the compact object. The orbital periods of LMXBs range from ten minutes to hundreds of days. Soft-gamma rays emitters.

URI:	#LowMassXRayBinary
Label:	Low-mass X-ray Binary
Subclass of	#GammaRaySource, #XRayBinary, (a composite term, see schema)
Disjoint with	#HighMassXrayBinary and #Magnetar
Paraphrase (experimental)	A #LowMassXRayBinary is something that, amongst other things, is a #GammaRaySource and is a #XRayBinary and has (a complex restriction, see schema) but is not a #HighMassXrayBinary and is not a #Magnetar

History

Class: LowPowerRadioLoudAGN

Definition: Low-Power Radio-loud AGN

URI:	#LowPowerRadioLoudAGN
Label:	Low-Power Radio-loud AGN
Subclass of	#RadioLoudAGN
Paraphrase (experimental)	A #LowPowerRadioLoudAGN is something that, amongst other things, is a #RadioLoudAGN

History

Class: LowPowerRadioQuietAGN_Seyfert

Definition: Seyfert Galaxy

URI:	#LowPowerRadioQuietAGN_Seyfert
Label:	Seyfert Galaxy
Subclass of	#InfraredSource, #RadioQuietAGN, #UltraVioletSource, #XRaySource, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#HighPowerRadioQuietAGN_QSO, #MiraCeti, #MolecularCloud, #OHIREnvelopeTypeStar, #Pulsar, #RSCanumVenaticorum, #StarburstGalaxy, #SupernovaRemnantShell, #TTauri and #XRayBinary
Paraphrase (experimental)	A #LowPowerRadioQuietAGN_Seyfert is something that, amongst other things, is a #InfraredSource and is a #RadioQuietAGN and is a #UltraVioletSource and is a #XRaySource and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #HighPowerRadioQuietAGN_QSO and is not a #MiraCeti and is not a #MolecularCloud and is not a #OHIREnvelopeTypeStar and is not a #Pulsar and is not a #RSCanumVenaticorum and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri and is not a #XRayBinary

History

Class: LowSurfaceBrightnessGalaxy

Definition: Low Surface Brightness Galaxy

URI:	#LowSurfaceBrightnessGalaxy
Label:	Low Surface Brightness Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #LowSurfaceBrightnessGalaxy is something that, amongst other things, is a #Galaxy

History

Class: LumX

Definition: LumX

URI:	#LumX
Label:	LumX
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #LumX is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: LuminosityClass

Definition: Luminosity Class

URI:	#LuminosityClass
Label:	Luminosity Class
Subclass of	#ClassificationCategory, (a composite term, see schema), (composite term, see schema) and (composite term, see schema)
Disjoint with	#SpectralType
Paraphrase (experimental)	A #LuminosityClass is something that, amongst other things, is a #ClassificationCategory and has (a complex restriction, see schema) and something that, amongst other things, is a and something that, amongst other things, is a but is not a #SpectralType

History

Class: LuminosityClassI

Definition:

URI:	#LuminosityClassI
Subclass of	#LuminosityClass, (a composite term, see schema)
Disjoint with	#LuminosityClassII, #LuminosityClassIII, #LuminosityClassIV and #LuminosityClassV
Paraphrase (experimental)	A #LuminosityClassI is something that, amongst other things, is a #LuminosityClass and has (a complex restriction, see schema) but is not a #LuminosityClassII and is not a #LuminosityClassIII and is not a #LuminosityClassIV and is not a #LuminosityClassV

History

Class: LuminosityClassII

Definition:

URI:	#LuminosityClassII
Subclass of	#LuminosityClass, (a composite term, see schema)
Disjoint with	#LuminosityClassIII, #LuminosityClassIV and #LuminosityClassV
Paraphrase (experimental)	A #LuminosityClassII is something that, amongst other things, is a #LuminosityClass and has (a complex restriction, see schema) but is not a #LuminosityClassIII and is not a #LuminosityClassIV and is not a #LuminosityClassV

History

Class: LuminosityClassIII

Definition:

URI:	#LuminosityClassIII
Subclass of	#LuminosityClass, (a composite term, see schema)
Disjoint with	#LuminosityClassIV and #LuminosityClassV
Paraphrase (experimental)	A #LuminosityClassIII is something that, amongst other things, is a #LuminosityClass and has (a complex restriction, see schema) but is not a #LuminosityClassIV and is not a #LuminosityClassV

History

Class: LuminosityClassIV

Definition:

URI:	#LuminosityClassIV
Subclass of	#LuminosityClass, (a composite term, see schema)
Disjoint with	#LuminosityClassV
Paraphrase (experimental)	A #LuminosityClassIV is something that, amongst other things, is a #LuminosityClass and has (a complex restriction, see schema) but is not a #LuminosityClassV

History

Class: LuminosityClassV

Definition:

URI:	#LuminosityClassV
Subclass of	#LuminosityClass and (a composite term, see schema)
Paraphrase (experimental)	A #LuminosityClassV is something that, amongst other things, is a #LuminosityClass and has (a complex restriction, see schema)

History

Class: LuminosityClassVI

Definition:

URI:	#LuminosityClassVI
Subclass of	#LuminosityClass and (a composite term, see schema)
Paraphrase (experimental)	A #LuminosityClassVI is something that, amongst other things, is a #LuminosityClass and has (a complex restriction, see schema)

History

Class: MStar

Definition: M Star

URI:	#MStar
Label:	Star of Spectral Type M
Label:	M Star
Subclass of	#LateTypeStar
Paraphrase (experimental)	A #MStar is something that, amongst other things, is a #LateTypeStar

History

Class: Magnetar

Definition: Magnetar

URI:	#Magnetar
Label:	Magnetar
Subclass of	#GammaRaySource and #Pulsar
Disjoint with	#HighMassXrayBinary and #LowMassXRayBinary
Paraphrase (experimental)	A #Magnetar is something that, amongst other things, is a #GammaRaySource and is a #Pulsar but is not a #HighMassXrayBinary and is not a #LowMassXRayBinary

History

Class: MagneticField

Definition: magnetic Field

URI:	#MagneticField
Label:	magnetic Field
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #MagneticField is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: Maser

Definition: Maser

URI:	#Maser
Label:	Maser
Subclass of	#RadioSource and (a composite term, see schema)
Paraphrase (experimental)	A #Maser is something that, amongst other things, is a #RadioSource and has (a complex restriction, see schema)

History

Class: MaserEmission

Definition: Maser Emission

URI:	#MaserEmission
Label:	Maser Emission
Subclass of	#Emission, (a composite term, see schema)
Disjoint with	#SynchrotronEmission
Paraphrase (experimental)	A #MaserEmission is something that, amongst other things, is a #Emission and has (a complex restriction, see schema) but is not a #SynchrotronEmission

History

Class: Mass

Definition: Mass

URI:	#Mass
Label:	Mass
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Mass is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: Measurement

Definition: Measurement

URI:	#Measurement
Label:	Measured observational parameters/properties
Label:	Measurement
Disjoint with	#AstrObject, #AstroPortion, #AtomicElement, #ClassificationCategory, #EMSpectrumRange, #Morphology and #Process
Paraphrase (experimental)	A #Measurement is something that, amongst other things, is not a #AstrObject and is not a #AstroPortion and is not a #AtomicElement and is not a #ClassificationCategory and is not a #EMSpectrumRange and is not a #Morphology and is not a #Process

History

Class: MetricRadioSource

Definition: Metric Radio Source

URI:	#MetricRadioSource
Label:	Metric Radio Source
Subclass of	#RadioSource and (a composite term, see schema)
Paraphrase (experimental)	A #MetricRadioSource is something that, amongst other things, is a #RadioSource and has (a complex restriction, see schema)

History

Class: MicroLensing

Definition: Micro-lensing

URI:	#MicroLensing
Label:	Micro-lensing
Subclass of	#Lensing
Disjoint with	#CosmologicalLensing
Paraphrase (experimental)	A #MicroLensing is something that, amongst other things, is a #Lensing but is not a #CosmologicalLensing

History

Class: MillimetricRadioSource

Definition: Millimetric Radio Source

URI:	#MillimetricRadioSource
Label:	Millimetric Radio Source
Subclass of	#RadioSource and (a composite term, see schema)
Paraphrase (experimental)	A #MillimetricRadioSource is something that, amongst other things, is a #RadioSource and has (a complex restriction, see schema)

History

Class: MiraCeti

Definition: Mira (Omicron) Ceti-type variables. These are long-period variable giants with characteristic late-type emission spectra (Me, Ce, Se) and light amplitudes from 2.5 to 11 mag in V. Their periodicity is well pronounced, and the periods lie in the range between 80 and 1000 days. Infrared amplitudes are usually less than in the visible and may be <2.5 mag. For example, in the K band they usually do not exceed 0.9 mag.

URI:	#MiraCeti
Label:	Variable Star of Mira Cet type
Label:	Mira Ceti Variable
Subclass of	#InfraredSource and #LongPeriodVariable
Disjoint with	#LTypeIrregularStar, #LowPowerRadioQuietAGN_Seyfert, #MolecularCloud, #OHIREnvelopeTypeStar, #SemiRegularPulsatingStar and #StarburstGalaxy
Paraphrase (experimental)	A #MiraCeti is something that, amongst other things, is a #InfraredSource and is a #LongPeriodVariable but is not a #LTypeIrregularStar and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MolecularCloud and is not a #OHIREnvelopeTypeStar and is not a #SemiRegularPulsatingStar and is not a #StarburstGalaxy

History

Class: MolecularCloud

Definition: Molecular Cloud

URI:	#MolecularCloud
Label:	Molecular Cloud
Subclass of	#Cloud, #InfraredSource and #RadioSource
Disjoint with	#HIIRegion, #HIRegion, #LowPowerRadioQuietAGN_Seyfert, #MiraCeti, #OHIREnvelopeTypeStar, #Pulsar, #RadioGalaxy, #RadioLoudAGN, #StarburstGalaxy, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #MolecularCloud is something that, amongst other things, is a #Cloud and is a #InfraredSource and is a #RadioSource but is not a #HIIRegion and is not a #HIRegion and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MiraCeti and is not a #OHIREnvelopeTypeStar and is not a #Pulsar and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: Molecules

Definition: Molecules

URI:	#Molecules
Label:	Molecules
Subclass of	#AstroPortion and (a composite term, see schema)
Paraphrase (experimental)	A #Molecules is something that, amongst other things, is a #AstroPortion and has (a complex restriction, see schema)

History

Class: Morphology

Definition: Morphological Feature

URI:	#Morphology
Label:	Geometry or morphology of astronomical objects (including components which are not astronomical objects)
Label:	Morphological Feature
Disjoint with	#AstrObject, #AstroPortion, #AtomicElement, #ClassificationCategory, #EMSpectrumRange, #Measurement and #Process
Paraphrase (experimental)	A #Morphology is something that, amongst other things, is not a #AstrObject and is not a #AstroPortion and is not a #AtomicElement and is not a #ClassificationCategory and is not a #EMSpectrumRange and is not a #Measurement and is not a #Process

History

Class: MorphologyCompoundObject

Definition: Compound Object Morphology

URI:	#MorphologyCompoundObject
Label:	Compound Object Morphology
Subclass of	#Morphology and (a composite term, see schema)
Paraphrase (experimental)	A #MorphologyCompoundObject is something that, amongst other things, is a #Morphology and has (a complex restriction, see schema)

History

Class: MultipleStar

Definition: Multiple Star

URI:	#MultipleStar
Label:	A system of two or more distinct stars
Label:	Multiple Star
Subclass of	#CompoundObject, #StellarObject, (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #GalaxyPair, #PlanetaryNebula and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #MultipleStar is something that, amongst other things, is a #CompoundObject and is a #StellarObject and has at least 2 #hasComponent property but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #PlanetaryNebula and is not a #SuperClusterOfGalaxies

History

Class: NearInfrared

Definition: Near Infrared

URI:	#NearInfrared
Label:	Wavelength under 10 microns
Label:	Near Infrared
Subclass of	#Infrared
Disjoint with	#FarInfrared
Paraphrase (experimental)	A #NearInfrared is something that, amongst other things, is a #Infrared but is not a #FarInfrared

History

Class: NearInfraredSource

Definition: Near-IR Source

URI:	#NearInfraredSource
Label:	Near-IR Source
Subclass of	#InfraredSource and (a composite term, see schema)
Paraphrase (experimental)	A #NearInfraredSource is something that, amongst other things, is a #InfraredSource and has (a complex restriction, see schema)

History

Class: Nebula

Definition: BRIGHT NEBULAECOMPACT NEBULAEDIFFUSE NEBULAEFILAMENTARY NEBULAEFILAMENTS [NEBULAE]GASEOUS NEBULAENEBULAE

URI:	#Nebula
Subclass of	#InterStellarMedium
Paraphrase (experimental)	A #Nebula is something that, amongst other things, is a #InterStellarMedium

History

Class: NeutralGas

Definition: Neutral Gas

URI:	#NeutralGas
Label:	Neutral Gas
Subclass of	#AstroPortion
Paraphrase (experimental)	A #NeutralGas is something that, amongst other things, is a #AstroPortion

History

Class: NeutronStar

Definition: Neutron Star

URI:	#NeutronStar
Label:	Neutron Star
Subclass of	#StellarRemnant, (a composite term, see schema)
Disjoint with	#PlanetaryNebulaCentralStar, #StellarBlackHole and #WhiteDwarf
Paraphrase (experimental)	A #NeutronStar is something that, amongst other things, is a #StellarRemnant and has (a complex restriction, see schema) but is not a #PlanetaryNebulaCentralStar and is not a #StellarBlackHole and is not a #WhiteDwarf

History

Class: NonPeriodicProcess

Definition: Non-periodic process

URI:	#NonPeriodicProcess
Label:	Non-periodic process
Subclass of	#Process and (a composite term, see schema)
Paraphrase (experimental)	A #NonPeriodicProcess is something that, amongst other things, is a #Process and has (a complex restriction, see schema)

History

Class: NonRadialPulsation

Definition: Non-radial Pulsation

URI:	#NonRadialPulsation
Label:	Non-radial Pulsation
Subclass of	#Pulsation and (composite term, see schema)
Disjoint with	#RadialPulsation
Paraphrase (experimental)	A #NonRadialPulsation is something that, amongst other things, is a #Pulsation and something that, amongst other things, is a but is not a #RadialPulsation

History

Class: NonStellarBody

Definition: Non-stellar Body

URI:	#NonStellarBody
Label:	Non-stellar Body
Subclass of	#SubStellarObject and (composite term, see schema)
Paraphrase (experimental)	A #NonStellarBody is something that, amongst other things, is a #SubStellarObject and something that, amongst other things, is a

History

Class: Nova

Definition: Close binary systems with orbital periods from 0.05 to 230 days. One of the components of these systems is a hot dwarf star that suddenly, during a time interval from one to several dozen or several hundred days, increases its brightness by 7-19 mag in V, then returns gradually to its former brightness over several months, years, or decades. Small changes at minimum light may be present. Cool components may be giants, subgiants, or dwarfs of K-M type. The spectra of novae near maximum light resemble A-F absorption spectra of luminous stars at first. Then broad emission lines (bands) of hydrogen, helium, and other elements with absorption components indicating the presence of a rapidly expanding envelope appear in the spectrum. As the light decreases, the composite spectrum begins to show forbidden lines characteristic of the spectra of gas nebulae excited by hot stars. At minimum light, the spectra of novae are generally continuous or resemble the spectra of Wolf-Rayet stars. Only spectra of the most massive systems show traces of cool components. Some novae reveal pulsations of hot components with periods of approximately 100 s and amplitudes of about 0.05 mag in V after an outburst. Some novae eventually turn out to be eclipsing systems. According to the features of their light variations, novae are subdivided into fast, slow, very slow, and recurrent categories.

URI:	#Nova
Label:	Nova
Subclass of	#CataclysmicVariable
Disjoint with	#AMHerCataclysmicVariable, #DQHerCataclysmicVariable and #RSCanumVenaticorum
Paraphrase (experimental)	A #Nova is something that, amongst other things, is a #CataclysmicVariable but is not a #AMHerCataclysmicVariable and is not a #DQHerCataclysmicVariable and is not a #RSCanumVenaticorum

History

Class: NovaLikeObject

Definition: Insufficiently studied objects resembling novae by the characteristics of their light changes or by spectral features. This type includes, in addition to variables showing novalike outbursts, objects with no bursts ever observed; the spectra of novalike variables resemble those of old novae, and small light changes resemble those typical for old novae at minimum light. However, quite often a detailed investigation makes it possible to reclassify some representatives of this highly inhomogeneous group of objects into other types.

URI:	#NovaLikeObject
Label:	Nova-like Object
Subclass of	#CataclysmicVariable
Disjoint with	#AMHerCataclysmicVariable, #DQHerCataclysmicVariable and #RSCanumVenaticorum
Paraphrase (experimental)	A #NovaLikeObject is something that, amongst other things, is a #CataclysmicVariable but is not a #AMHerCataclysmicVariable and is not a #DQHerCataclysmicVariable and is not a #RSCanumVenaticorum

History

Class: OBAssociation

Definition: association of stars of type O or B

URI:	#OBAssociation
Label:	association of stars of type O or B
Subclass of	#AssociationOfStars and (a composite term, see schema)
Paraphrase (experimental)	A #OBAssociation is something that, amongst other things, is a #AssociationOfStars and has (a complex restriction, see schema)

History

Class: OHIREnvelopeTypeStar

Definition: OH/IR Envelope-type Star

URI:	#OHIREnvelopeTypeStar
Label:	OH/IR Envelope-type Star
Subclass of	#AsymptoticGiantBranchStar, #InfraredSource, #Maser and #RedSuperGiant
Disjoint with	#CarbonStar, #LowPowerRadioQuietAGN_Seyfert, #MiraCeti, #MolecularCloud, #SStar and #StarburstGalaxy
Paraphrase (experimental)	A #OHIREnvelopeTypeStar is something that, amongst other things, is a #AsymptoticGiantBranchStar and is a #InfraredSource and is a #Maser and is a #RedSuperGiant but is not a #CarbonStar and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MiraCeti and is not a #MolecularCloud and is not a #SStar and is not a #StarburstGalaxy

History

Class: OStar

Definition: O Star

URI:	#OStar
Label:	Star of Spectral Type O
Label:	O Star
Subclass of	#EarlyTypeStar
Paraphrase (experimental)	A #OStar is something that, amongst other things, is a #EarlyTypeStar

History

Class: OldDisk

Definition: Old Disk

URI:	#OldDisk
Label:	Galactic Sperical Component (old disk)
Label:	Old Disk
Subclass of	#PortionOfGalaxy
Disjoint with	#Halo and #SpiralArm
Paraphrase (experimental)	A #OldDisk is something that, amongst other things, is a #PortionOfGalaxy but is not a #Halo and is not a #SpiralArm

History

Class: OpenCluster

Definition: Open Cluster

URI:	#OpenCluster
Label:	Open Cluster
Subclass of	#ClusterOfStars
Disjoint with	#GlobularCluster
Paraphrase (experimental)	A #OpenCluster is something that, amongst other things, is a #ClusterOfStars but is not a #GlobularCluster

History

Class: Optical

Definition: Optical

URI:	#Optical
Label:	Optical
Subclass of	#EMSpectrumRange
Disjoint with	#GammaRays, #Infrared, #Radio, #UltraViolet and #XRays
Paraphrase (experimental)	A #Optical is something that, amongst other things, is a #EMSpectrumRange but is not a #GammaRays and is not a #Infrared and is not a #Radio and is not a #UltraViolet and is not a #XRays

History

Class: OpticalSource

Definition: Optical Source

URI:	#OpticalSource
Label:	Optical Source
Subclass of	#EMSource and (a composite term, see schema)
Paraphrase (experimental)	A #OpticalSource is something that, amongst other things, is a #EMSource and has (a complex restriction, see schema)

History

Class: OpticallyViolentlyVariableQuasar

Definition: Optically Violently Variable Object

URI:	#OpticallyViolentlyVariableQuasar
Label:	Optically Violently Variable Object
Subclass of	#FlatSpectrumRadioQuasar
Disjoint with	#Blazar
Paraphrase (experimental)	A #OpticallyViolentlyVariableQuasar is something that, amongst other things, is a #FlatSpectrumRadioQuasar but is not a #Blazar

History

Class: OrionVariableStar

Definition: Orion variables. Irregular, eruptive variables connected with bright or dark diffuse nebulae or observed in the regions of these nebulae. Some of them may show cyclic light variations caused by axial rotation. In the Spectrum-Luminosity diagram, they are found in the area of the main sequence and subgiants. They are probably young objects that, during the course of further evolution, will become light-constant stars on the zero-age main sequence (ZAMS). The range of brightness variations may reach several magnitudes. This type may be divided into the following subtypes: - Rapid light variations observed (up to 1 mag in 1-10 days), - Orion variables of early spectral types (B-A or Ae). They are often characterized by occasional abrupt Algol-like fadings (T Ori); - Orion variables of intermediate and late spectral types, F-M or Fe-Me (BH Cep, AH Ori). F-type stars may show Algol-like fadings; K-M stars may produce flares along with irregular light variations; - Orion variables of the T Tauri type. Stars are assigned to this type on the basis of the following (purely spectroscopic) criteria: spectral types are in the range Fe-Me. The spectra of most typical stars resemble the spectrum of the solar chromosphere. The feature specific to the type is the presence of the flourescent emission lines Fe II 4046, 4132 A (anomalously intense in the spectra of these stars), emission lines [Si II] and [O I], as well as the absorption line Li I 6707 A. These variables are usually observed only in diffuse nebulae. - Some Orion variables (YY Ori) show the presence of absorption components on the redward sides of emission lines, indicating the infall of matter toward the stars' surfaces.

URI:	#OrionVariableStar
Label:	Variable Star of Orion type
Label:	Orion Variable Star
Subclass of	#EruptiveVariableStellarObject, #IrregularVariableStellarObject and #PreMainSequenceStar
Disjoint with	#CataclysmicVariable and #RCoronaeBorealis
Paraphrase (experimental)	A #OrionVariableStar is something that, amongst other things, is a #EruptiveVariableStellarObject and is a #IrregularVariableStellarObject and is a #PreMainSequenceStar but is not a #CataclysmicVariable and is not a #RCoronaeBorealis

History

Class: Parallax

Definition: PARALLAXES

URI:	#Parallax
Subclass of	#Measurement, (a composite term, see schema)
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Parallax is something that, amongst other things, is a #Measurement and has (a complex restriction, see schema) but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: PartOfCloud

Definition: Part Of Cloud

URI:	#PartOfCloud
Label:	Part Of Cloud
Subclass of	#AstroPortion
Paraphrase (experimental)	A #PartOfCloud is something that, amongst other things, is a #AstroPortion

History

Class: PartOfGalaxy

Definition: Part of Galaxy

URI:	#PartOfGalaxy
Label:	Part of Galaxy
Subclass of	#PortionOfGalaxy
Paraphrase (experimental)	A #PartOfGalaxy is something that, amongst other things, is a #PortionOfGalaxy

History

Class: PeculiarGalaxy

Definition: Peculiar Galaxy

URI:	#PeculiarGalaxy
Label:	Peculiar Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #PeculiarGalaxy is something that, amongst other things, is a #Galaxy

History

Class: PeculiarStar

Definition: Peculiar Stellar Object

URI:	#PeculiarStar
Label:	Peculiar Stellar Object
Subclass of	#Star
Paraphrase (experimental)	A #PeculiarStar is something that, amongst other things, is a #Star

History

Class: Period

Definition: Period

URI:	#Period
Label:	Period
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Period is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: Photosphere

Definition: Photosphere

URI:	#Photosphere
Label:	Photosphere
Subclass of	#PortionOfStellarObject
Paraphrase (experimental)	A #Photosphere is something that, amongst other things, is a #PortionOfStellarObject

History

Class: Planet

Definition: Planet

URI:	#Planet
Label:	(Extra-solar) Planet (or candidate)
Label:	Planet
Subclass of	#NonStellarBody
Disjoint with	#Asteroid and #Comet
Paraphrase (experimental)	A #Planet is something that, amongst other things, is a #NonStellarBody but is not a #Asteroid and is not a #Comet

History

Class: PlanetaryNebula

Definition: Planetary Nebula

URI:	#PlanetaryNebula
Label:	A planetary nebula is a nebula surrounding a stellar remnant (white dwarf)
Label:	Planetary Nebula
Subclass of	#CompoundObject, (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #GalaxyPair, #MultipleStar and #SuperClusterOfGalaxies
Paraphrase (experimental)	A #PlanetaryNebula is something that, amongst other things, is a #CompoundObject and has (a complex restriction, see schema) but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #MultipleStar and is not a #SuperClusterOfGalaxies

History

Class: PlanetaryNebulaCentralStar

Definition: Planetary Nebula Central Star

URI:	#PlanetaryNebulaCentralStar
Label:	Planetary Nebula Central Star
Subclass of	#StellarRemnant, (a composite term, see schema)
Disjoint with	#NeutronStar, #StellarBlackHole and #WhiteDwarf
Paraphrase (experimental)	A #PlanetaryNebulaCentralStar is something that, amongst other things, is a #StellarRemnant and has (a complex restriction, see schema) but is not a #NeutronStar and is not a #StellarBlackHole and is not a #WhiteDwarf

History

Class: PlanetaryNebulaShell

Definition: Planetary Nebula Shell

URI:	#PlanetaryNebulaShell
Label:	Planetary Nebula Shell
Subclass of	#EmissionNebula, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#HIIRegion and #SupernovaRemnantShell
Paraphrase (experimental)	A #PlanetaryNebulaShell is something that, amongst other things, is a #EmissionNebula and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #HIIRegion and is not a #SupernovaRemnantShell

History

Class: PolarRingGalaxy

Definition: Polar Ring Galaxy

URI:	#PolarRingGalaxy
Label:	Polar Ring Galaxy
Subclass of	#RingGalaxy
Paraphrase (experimental)	A #PolarRingGalaxy is something that, amongst other things, is a #RingGalaxy

History

Class: Polarization

Definition: POLARIZATION [WAVES]

URI:	#Polarization
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Polarization is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: PortionOfGalaxy

Definition: Portion of Galaxy

URI:	#PortionOfGalaxy
Label:	Any component of a galaxy
Label:	Portion of Galaxy
Subclass of	#AstroPortion, (a composite term, see schema)
Disjoint with	#PortionOfStellarObject
Paraphrase (experimental)	A #PortionOfGalaxy is something that, amongst other things, is a #AstroPortion and has (a complex restriction, see schema) but is not a #PortionOfStellarObject

History

Class: PortionOfStellarObject

Definition: Portion of Stellar Object

URI:	#PortionOfStellarObject
Label:	any component of a stellar object
Label:	Portion of Stellar Object
Subclass of	#AstroPortion, (a composite term, see schema)
Disjoint with	#PortionOfGalaxy
Paraphrase (experimental)	A #PortionOfStellarObject is something that, amongst other things, is a #AstroPortion and has (a complex restriction, see schema) but is not a #PortionOfGalaxy

History

Class: PostAsymptoticGiantBranchStar

Definition: Post-AGB Star

URI:	#PostAsymptoticGiantBranchStar
Label:	Post-AGB Star
Subclass of	#GiantStar
Paraphrase (experimental)	A #PostAsymptoticGiantBranchStar is something that, amongst other things, is a #GiantStar

History

Class: PostTTauri

Definition: Post-T Tauri star (PTTS) (SES) 1. Observational, a young star that exhibits a photospheric spectrum over a wavelength range from the NIR and longward. Description: Among solar-type PMS stars, such objects can be identified from their location in the HRD, from their x-ray properties supplemented by HRD location (confirmed from parallaxes; radial velocities; clear membership in a cluster.....) plus a robust SED. Among higher mass stars, such objectsmight be called “Post Ae/Be stars” and can be identified via their location in the HRD in a cluster/association plus robust SEDs. 2. Physical, a young star of any mass that no longeris surrounded by a circumstellar accretion disk. 3. Physical, an evolutionary step between T Tauri Stars and ZAMS, generally thought to refer to stars on the radiative track. Comments: In these definitions, there is no physical difference between a WTTS and a post-TTS. It’s just the choice of observational ‘tool’ for certifying that such an object is no longer accreting material. There is some sentiment on the committee for specifying that a Post-T Tauri star is older than either a CTTS or a WTTS (e.g., with ages of 5-30 Myr). See also naked T Tauri star. Naked T Tauri star (NTTS) (supplied by Scott Wolk and Fred Walter) 1. Observational, a low mass pre-main sequence star that exhibits no evidence of an optically thick circumstellar disk or on-going accretion. Description: In this picture, a NTTS differs from a post-T Tauri star in being an observational definition while the PTTS is described by definition 3 for post-T Tauri Star.

URI:	#PostTTauri
Label:	Naked T Tauri stars are basically the same as Post-T Tauri stars.
Label:	Post-T Tauri Star
Subclass of	#YoungStellarObject
Paraphrase (experimental)	A #PostTTauri is something that, amongst other things, is a #YoungStellarObject

History

Class: PowerRadio

Definition: Power Radio

URI:	#PowerRadio
Label:	Power Radio
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #PowerRadio is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: PowerRadioGhz

Definition: Power Radio Ghz

URI:	#PowerRadioGhz
Label:	Power Radio Ghz
Subclass of	#PowerRadio
Disjoint with	#PowerRadioMhz
Paraphrase (experimental)	A #PowerRadioGhz is something that, amongst other things, is a #PowerRadio but is not a #PowerRadioMhz

History

Class: PowerRadioMhz

Definition: Power Radio Mhz

URI:	#PowerRadioMhz
Label:	Power Radio Mhz
Subclass of	#PowerRadio
Paraphrase (experimental)	A #PowerRadioMhz is something that, amongst other things, is a #PowerRadio

History

Class: PreMainSequenceStar

Definition: Pre-Main-Sequence Object (PMS) (NJE) 1. Observational, a star that lies above the main sequence.

URI:	#PreMainSequenceStar
Label:	Pre-Main Sequence Star
Subclass of	#YoungStellarObject and (composite term, see schema)
Disjoint with	#ProtoStar
Paraphrase (experimental)	A #PreMainSequenceStar is something that, amongst other things, is a #YoungStellarObject and something that, amongst other things, is a but is not a #ProtoStar

History

Class: Process

Definition: Process

URI:	#Process
Label:	Phenomenon or associated process
Label:	Process
Disjoint with	#AstrObject, #AstroPortion, #AtomicElement, #ClassificationCategory, #EMSpectrumRange, #Measurement and #Morphology
Paraphrase (experimental)	A #Process is something that, amongst other things, is not a #AstrObject and is not a #AstroPortion and is not a #AtomicElement and is not a #ClassificationCategory and is not a #EMSpectrumRange and is not a #Measurement and is not a #Morphology

History

Class: ProperMotion

Definition: Proper Motion

URI:	#ProperMotion
Label:	component of SpaceVelocity
Label:	Proper Motion
Subclass of	#Velocity, (a composite term, see schema)
Disjoint with	#RadialVelocity, #Redshift, #SpaceVelocity and #VelocityDispersion
Paraphrase (experimental)	A #ProperMotion is something that, amongst other things, is a #Velocity and has (a complex restriction, see schema) but is not a #RadialVelocity and is not a #Redshift and is not a #SpaceVelocity and is not a #VelocityDispersion

History

Class: ProtoPlanetaryDisk

Definition: protoplanetary disk (CL) 1. Physical, a primordial disk with the potential to form planets.

URI:	#ProtoPlanetaryDisk
Label:	alternate name: proplyd
Label:	Protoplanetary disk
Subclass of	#CircumstellarDisk and (a composite term, see schema)
Paraphrase (experimental)	A #ProtoPlanetaryDisk is something that, amongst other things, is a #CircumstellarDisk and has (a complex restriction, see schema)

History

Class: ProtoStar

Definition: protostar (NJE) 1. Physical, an object that is still accreting mass and that will become or already is a main sequence star. 2. Physical, an object deriving most of its luminosity from accretion and that will become a main sequence star. 3. Physical, the entire structure of central star, disk, and envelope. Comments: The first definition allows the inclusion of massive protostars, which can be already burning nuclear fuel but still growing in mass. The second does not allow them above a certain mass where the nuclear-burning luminosity exceeds that from accretion. Both the first two apply to the central object, while the third refers to the entire structure. For the first two definitions, objects in Stages 0, I, or II could host protostars; For the third definition, only Stages 0 and I would be protostars.

URI:	#ProtoStar
Label:	Protostar
Subclass of	#SubMillimetricRadioSource and #YoungStellarObject
Disjoint with	#PreMainSequenceStar
Paraphrase (experimental)	A #ProtoStar is something that, amongst other things, is a #SubMillimetricRadioSource and is a #YoungStellarObject but is not a #PreMainSequenceStar

History

Class: Pulsar

Definition: Optically variable pulsars (CM Tau), which are rapidly rotating neutron stars with strong magnetic fields, radiating in the radio, optical, and X-ray regions. Pulsars emit narrow beams of radiation, and periods of their light changes coincide with rotational periods (from 0.004 to 4 s), while amplitudes of the light pulses reach 0.8 mag.

URI:	#Pulsar
Label:	Pulsar
Subclass of	#NeutronStar, #OpticalSource, #RadioSource, #RotationallyVariableStellarObject and #XRaySource
Disjoint with	#AGN, #Alpha2CanumVenaticorum, #HIIRegion, #HIRegion, #LowPowerRadioQuietAGN_Seyfert, #MolecularCloud, #RSCanumVenaticorum, #RadioGalaxy, #RadioLoudAGN, #StarburstGalaxy, #SupernovaRemnantShell, #TTauri and #XRayBinary
Paraphrase (experimental)	A #Pulsar is something that, amongst other things, is a #NeutronStar and is a #OpticalSource and is a #RadioSource and is a #RotationallyVariableStellarObject and is a #XRaySource but is not a #AGN and is not a #Alpha2CanumVenaticorum and is not a #HIIRegion and is not a #HIRegion and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MolecularCloud and is not a #RSCanumVenaticorum and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri and is not a #XRayBinary

History

Class: PulsatingAlpha2CVn

Definition: Pulsating Alpha2 Canum Venaticorum

URI:	#PulsatingAlpha2CVn
Label:	Pulsating Alpha2 Canum Venaticorum
Subclass of	#Alpha2CanumVenaticorum and #PulsatingStellarObject
Disjoint with	#BetaCephei, #Cepheid, #DeltaScuti, #GammaDoradus, #LongPeriodVariable, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae, #RVTauri and #WVirginisStar
Paraphrase (experimental)	A #PulsatingAlpha2CVn is something that, amongst other things, is a #Alpha2CanumVenaticorum and is a #PulsatingStellarObject but is not a #BetaCephei and is not a #Cepheid and is not a #DeltaScuti and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #WVirginisStar

History

Class: PulsatingStellarObject

Definition: Pulsating variables are stars showing periodic expansion and contraction of their surface layers. The pulsations may be radial or nonradial. A radially pulsating star remains spherical in shape, while in the case of nonradial pulsations the star's shape periodically deviates from a sphere, and even neighboring zones of its surface may have opposite pulsation phases. Depending on the period value, on the mass and evolutionary status of the star, and on the scale of pulsational phenomena, different types of pulsating variables may be distinguished.

URI:	#PulsatingStellarObject
Label:	Pulsating Variable Star
Label:	Pulsating Star
Subclass of	#VariableStellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #PulsatingStellarObject is something that, amongst other things, is a #VariableStellarObject and has (a complex restriction, see schema)

History

Class: PulsatingWhiteDwarf

Definition: Pulsating White Dwarf

URI:	#PulsatingWhiteDwarf
Label:	Pulsating White Dwarf
Subclass of	#PulsatingStellarObject and #WhiteDwarf
Disjoint with	#BetaCephei, #Cepheid, #DeltaScuti, #GammaDoradus, #LongPeriodVariable, #PulsatingAlpha2CVn, #RCoronaeBorealis, #RRLyrae, #RVTauri and #WVirginisStar
Paraphrase (experimental)	A #PulsatingWhiteDwarf is something that, amongst other things, is a #PulsatingStellarObject and is a #WhiteDwarf but is not a #BetaCephei and is not a #Cepheid and is not a #DeltaScuti and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri and is not a #WVirginisStar

History

Class: Pulsation

Definition: Pulsation Process

URI:	#Pulsation
Label:	Pulsation Process
Subclass of	#Process
Paraphrase (experimental)	A #Pulsation is something that, amongst other things, is a #Process

History

Class: QSO1AGN

Definition: QSO type 1

URI:	#QSO1AGN
Label:	Type1 QSO Active Galactic Nucleus
Label:	QSO type 1
Subclass of	#HighPowerRadioQuietAGN_QSO
Disjoint with	#QSO2AGN
Paraphrase (experimental)	A #QSO1AGN is something that, amongst other things, is a #HighPowerRadioQuietAGN_QSO but is not a #QSO2AGN

History

Class: QSO2AGN

Definition: QSO2

URI:	#QSO2AGN
Label:	Type2 QSO Active Galactic Nucleus
Label:	QSO2
Subclass of	#HighPowerRadioQuietAGN_QSO
Disjoint with	#QSO1AGN
Paraphrase (experimental)	A #QSO2AGN is something that, amongst other things, is a #HighPowerRadioQuietAGN_QSO but is not a #QSO1AGN

History

Class: RCoronaeBorealis

Definition: Variables of the R Coronae Borealis type. These are hydrogen-poor, carbon- and helium-rich, high-luminosity stars belonging to the spectral types Bpe-R, which are simultaneously eruptive and pulsating variables. They show slow nonperiodic fadings by 1-9 mag in V lasting from a month or more to several hundred days. These changes are superposed on cyclic pulsations with amplitudes up to several tenths of a magnitude and periods in the range 30-100 days.

URI:	#RCoronaeBorealis
Label:	Variable Star of R CrB type
Label:	R Coronae Borealis Variable
Subclass of	#EruptiveVariableStellarObject, #PulsatingStellarObject and #SuperGiantStar
Disjoint with	#BSuperGiant, #BetaCephei, #CataclysmicVariable, #Cepheid, #DeltaScuti, #FlareStar, #GammaDoradus, #LongPeriodVariable, #OrionVariableStar, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RRLyrae, #RVTauri, #RapidIrregularVariableStar and #WVirginisStar
Paraphrase (experimental)	A #RCoronaeBorealis is something that, amongst other things, is a #EruptiveVariableStellarObject and is a #PulsatingStellarObject and is a #SuperGiantStar but is not a #BSuperGiant and is not a #BetaCephei and is not a #CataclysmicVariable and is not a #Cepheid and is not a #DeltaScuti and is not a #FlareStar and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #OrionVariableStar and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RRLyrae and is not a #RVTauri and is not a #RapidIrregularVariableStar and is not a #WVirginisStar

History

Class: RRLyrae

Definition: Variables of the RR Lyrae type, which are radially-pulsating giant A-F stars having amplitudes from 0.2 to 2 mag in V. Cases of variable light-curve shapes as well as variable periods are known. If these changes are periodic, they are called the "Blazhko effect." Traditionally, RR Lyrae stars are sometimes called short-period Cepheids or cluster-type variables. The majority of these stars belong to the spherical component of the Galaxy; they are present, sometimes in large numbers, in some globular clusters, where they are known as pulsating horizontal-branch stars. Like Cepheids, maximum expansion velocities of surface layers for these stars practically coincide with maximum light. Sub-types: - RR Lyrae variables showing two simultaneously operating pulsation modes, the fundamental tone with the period P0 and the first overtone, P1 (AQ Leo). The ratio P1/P0 is approximately 0.745; - RR Lyrae variables with asymmetric light curves (steep ascending branches), periods from 0.3 to 1.2 days, and amplitudes from 0.5 to 2 mag in V; - RR Lyrae variables with nearly symmetric, sometimes sinusoidal, light curves, periods from 0.2 to 0.5 days, and amplitudes not greater than 0.8 mag in V (SX UMa).

URI:	#RRLyrae
Label:	Variable Star of RR Lyr type
Label:	RR Lyrae Variable
Subclass of	#GiantStar and #PulsatingStellarObject
Disjoint with	#BetaCephei, #Cepheid, #DeltaScuti, #GammaDoradus, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RVTauri and #WVirginisStar
Paraphrase (experimental)	A #RRLyrae is something that, amongst other things, is a #GiantStar and is a #PulsatingStellarObject but is not a #BetaCephei and is not a #Cepheid and is not a #DeltaScuti and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RVTauri and is not a #WVirginisStar

History

Class: RSCanumVenaticorum

Definition: Eruptive variables of the RS Canum Venaticorum type. This type is ascribed to close binary systems with spectra showing Ca II H and K in emission, their components having enhanced chromospheric activity that causes quasi-periodic light variability. The period of variation is close to the orbital one, and the variability amplitude is usually as great as 0.2 mag in V (UX Ari). They are X-ray sources and rotating variables. RS CVn itself is also an eclipsing system.

URI:	#RSCanumVenaticorum
Label:	Variable of RS CVn type
Label:	RS Canum Venaticorum Variable Star
Subclass of	#CataclysmicVariable, #RotationallyVariableStellarObject and #XRaySource
Disjoint with	#AMHerCataclysmicVariable, #Alpha2CanumVenaticorum, #DQHerCataclysmicVariable, #DwarfNova, #LowPowerRadioQuietAGN_Seyfert, #Nova, #NovaLikeObject, #Pulsar, #SupernovaRemnantShell, #TTauri and #XRayBinary
Paraphrase (experimental)	A #RSCanumVenaticorum is something that, amongst other things, is a #CataclysmicVariable and is a #RotationallyVariableStellarObject and is a #XRaySource but is not a #AMHerCataclysmicVariable and is not a #Alpha2CanumVenaticorum and is not a #DQHerCataclysmicVariable and is not a #DwarfNova and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #Nova and is not a #NovaLikeObject and is not a #Pulsar and is not a #SupernovaRemnantShell and is not a #TTauri and is not a #XRayBinary

History

Class: RVTauri

Definition: Variables of the RV Tauri type. These are radially pulsating supergiants having spectral types F-G at maximum light and K-M at minimum. The light curves are characterized by the presence of double waves with alternating primary and secondary minima that can vary in depth so that primary minima may become secondary and vice versa. The complete light amplitude may reach 3-4 mag in V. Periods between two adjacent primary minima (usually called formal periods) lie in the range 30-150 days. Two subtypes are recognized: - RV Tauri variables that do not vary in mean magnitude (AC Her); - RV Tauri variables that periodically (with periods from 600 to 1500 days and amplitudes up to 2 mag in V) vary in mean magnitude (DF Cyg, RV Tau).

URI:	#RVTauri
Label:	Variable Star of RV Tau type
Label:	RV Tauri Variable Star
Subclass of	#PulsatingStellarObject and #SuperGiantStar
Disjoint with	#BetaCephei, #Cepheid, #DeltaScuti, #GammaDoradus, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae and #WVirginisStar
Paraphrase (experimental)	A #RVTauri is something that, amongst other things, is a #PulsatingStellarObject and is a #SuperGiantStar but is not a #BetaCephei and is not a #Cepheid and is not a #DeltaScuti and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #WVirginisStar

History

Class: RadialPulsation

Definition: Radial Pulsation

URI:	#RadialPulsation
Label:	Radial Pulsation
Subclass of	#Pulsation
Disjoint with	#NonRadialPulsation
Paraphrase (experimental)	A #RadialPulsation is something that, amongst other things, is a #Pulsation but is not a #NonRadialPulsation

History

Class: RadialVelocity

Definition: Radial Velocity

URI:	#RadialVelocity
Label:	component of SpaceVelocity
Label:	Radial Velocity
Subclass of	#Velocity
Disjoint with	#Redshift, #SpaceVelocity and #VelocityDispersion
Paraphrase (experimental)	A #RadialVelocity is something that, amongst other things, is a #Velocity but is not a #Redshift and is not a #SpaceVelocity and is not a #VelocityDispersion

History

Class: Radio

Definition: Radio

URI:	#Radio
Label:	Radio
Subclass of	#EMSpectrumRange
Disjoint with	#GammaRays, #Infrared, #Optical, #UltraViolet and #XRays
Paraphrase (experimental)	A #Radio is something that, amongst other things, is a #EMSpectrumRange but is not a #GammaRays and is not a #Infrared and is not a #Optical and is not a #UltraViolet and is not a #XRays

History

Class: RadioCentimetric

Definition: Radio Centimetric

URI:	#RadioCentimetric
Label:	Radio Centimetric
Subclass of	#Radio
Disjoint with	#RadioMetric, #RadioMillimetric and #RadioSubMillimetric
Paraphrase (experimental)	A #RadioCentimetric is something that, amongst other things, is a #Radio but is not a #RadioMetric and is not a #RadioMillimetric and is not a #RadioSubMillimetric

History

Class: RadioGalaxy

Definition: Radio Galaxy

URI:	#RadioGalaxy
Label:	Radio Galaxy
Subclass of	#Galaxy, #RadioSource, (a composite term, see schema)
Disjoint with	#HIIRegion, #HIRegion, #MolecularCloud, #Pulsar, #RadioLoudAGN, #StarburstGalaxy, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #RadioGalaxy is something that, amongst other things, is a #Galaxy and is a #RadioSource and has (a complex restriction, see schema) but is not a #HIIRegion and is not a #HIRegion and is not a #MolecularCloud and is not a #Pulsar and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: RadioLoudAGN

Definition: Radio-loud AGN

URI:	#RadioLoudAGN
Label:	Radio-loud AGN
Subclass of	#AGN, #RadioSource, (a composite term, see schema)
Disjoint with	#HIIRegion, #HIRegion, #MolecularCloud, #Pulsar, #RadioGalaxy, #RadioQuietAGN, #StarburstGalaxy, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #RadioLoudAGN is something that, amongst other things, is a #AGN and is a #RadioSource and has (a complex restriction, see schema) but is not a #HIIRegion and is not a #HIRegion and is not a #MolecularCloud and is not a #Pulsar and is not a #RadioGalaxy and is not a #RadioQuietAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: RadioMetric

Definition: Radio Metric

URI:	#RadioMetric
Label:	Radio Metric
Subclass of	#Radio
Disjoint with	#RadioCentimetric, #RadioMillimetric and #RadioSubMillimetric
Paraphrase (experimental)	A #RadioMetric is something that, amongst other things, is a #Radio but is not a #RadioCentimetric and is not a #RadioMillimetric and is not a #RadioSubMillimetric

History

Class: RadioMillimetric

Definition: Radio Millimetric

URI:	#RadioMillimetric
Label:	Radio Millimetric
Subclass of	#Radio
Disjoint with	#RadioCentimetric, #RadioMetric and #RadioSubMillimetric
Paraphrase (experimental)	A #RadioMillimetric is something that, amongst other things, is a #Radio but is not a #RadioCentimetric and is not a #RadioMetric and is not a #RadioSubMillimetric

History

Class: RadioQuietAGN

Definition: Radio-quiet AGN

URI:	#RadioQuietAGN
Label:	Radio-quiet AGN
Subclass of	#AGN and (composite term, see schema)
Disjoint with	#RadioLoudAGN
Paraphrase (experimental)	A #RadioQuietAGN is something that, amongst other things, is a #AGN and something that, amongst other things, is a but is not a #RadioLoudAGN

History

Class: RadioSource

Definition: Radio Source

URI:	#RadioSource
Label:	Radio Source
Subclass of	#EMSource and (a composite term, see schema)
Paraphrase (experimental)	A #RadioSource is something that, amongst other things, is a #EMSource and has (a complex restriction, see schema)

History

Class: RadioSubMillimetric

Definition: Radio Submillimetric

URI:	#RadioSubMillimetric
Label:	Radio Submillimetric
Subclass of	#Radio
Disjoint with	#RadioCentimetric, #RadioMetric and #RadioMillimetric
Paraphrase (experimental)	A #RadioSubMillimetric is something that, amongst other things, is a #Radio but is not a #RadioCentimetric and is not a #RadioMetric and is not a #RadioMillimetric

History

Class: RapidIrregularVariableStar

Definition: Rapid irregular variables (class: eruptive) having no apparent connection with diffuse nebulae and showing light changes of about 0.5 - 1.0 mag within several hours or days. There is no strict boundary between rapid irregular and Orion variables. If a rapid irregular star is observed in the region of a diffuse nebula, it is considered an Orion variable. To attribute a variable to this type (R.I.), it is necessary to take much care to be certain that its light changes are really not periodic. Sub-types: - Rapid irregular variables of the early spectral types, B-A or Ae; - Rapid irregular variables of the intermediate and late spectral types, F-M and Fe-Me.

URI:	#RapidIrregularVariableStar
Label:	Variable Star with rapid variations
Label:	Rapid Irregular Variable Star
Subclass of	#EruptiveVariableStellarObject and #IrregularVariableStellarObject
Disjoint with	#CataclysmicVariable and #RCoronaeBorealis
Paraphrase (experimental)	A #RapidIrregularVariableStar is something that, amongst other things, is a #EruptiveVariableStellarObject and is a #IrregularVariableStellarObject but is not a #CataclysmicVariable and is not a #RCoronaeBorealis

History

Class: Red

Definition: Red

URI:	#Red
Label:	Red
Subclass of	#Optical
Paraphrase (experimental)	A #Red is something that, amongst other things, is a #Optical

History

Class: RedGiant

Definition: Red Giant

URI:	#RedGiant
Label:	Red Giant
Subclass of	#GiantStar and #LateTypeStar
Paraphrase (experimental)	A #RedGiant is something that, amongst other things, is a #GiantStar and is a #LateTypeStar

History

Class: RedObject

Definition: Red Object

URI:	#RedObject
Label:	Red Object
Subclass of	#EMSource
Paraphrase (experimental)	A #RedObject is something that, amongst other things, is a #EMSource

History

Class: RedSuperGiant

Definition: Red Supergiant

URI:	#RedSuperGiant
Label:	Red Supergiant
Subclass of	#LateTypeStar and #SuperGiantStar
Paraphrase (experimental)	A #RedSuperGiant is something that, amongst other things, is a #LateTypeStar and is a #SuperGiantStar

History

Class: Redshift

Definition: Redshift

URI:	#Redshift
Label:	Redshift
Subclass of	#Velocity, (a composite term, see schema)
Disjoint with	#SpaceVelocity and #VelocityDispersion
Paraphrase (experimental)	A #Redshift is something that, amongst other things, is a #Velocity and has (a complex restriction, see schema) but is not a #SpaceVelocity and is not a #VelocityDispersion

History

Class: Reflection

Definition: Reflection Process

URI:	#Reflection
Label:	Reflection of stellar light
Label:	Reflection Process
Subclass of	#Process
Paraphrase (experimental)	A #Reflection is something that, amongst other things, is a #Process

History

Class: ReflectionNebula

Definition: Reflection Nebula

URI:	#ReflectionNebula
Label:	Reflection Nebula
Subclass of	#Nebula, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#EmissionNebula
Paraphrase (experimental)	A #ReflectionNebula is something that, amongst other things, is a #Nebula and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #EmissionNebula

History

Class: RingGalaxy

Definition: Ring Galaxy

URI:	#RingGalaxy
Label:	Ring Galaxy
Subclass of	#LenticularGalaxy and #SpiralGalaxy
Paraphrase (experimental)	A #RingGalaxy is something that, amongst other things, is a #LenticularGalaxy and is a #SpiralGalaxy

History

Class: RocheLobe

Definition: Roche Lobe

URI:	#RocheLobe
Label:	Roche Lobe
Subclass of	#Morphology and (a composite term, see schema)
Paraphrase (experimental)	A #RocheLobe is something that, amongst other things, is a #Morphology and has (a complex restriction, see schema)

History

Class: Rotation

Definition: Rotation Process

URI:	#Rotation
Label:	Rotation Process
Subclass of	#Process
Paraphrase (experimental)	A #Rotation is something that, amongst other things, is a #Process

History

Class: RotationPoweredPulsar

Definition: Rotation-powered Pulsar

URI:	#RotationPoweredPulsar
Label:	Rotation-powered Pulsar
Subclass of	#Pulsar
Disjoint with	#AccretionPoweredPulsar
Paraphrase (experimental)	A #RotationPoweredPulsar is something that, amongst other things, is a #Pulsar but is not a #AccretionPoweredPulsar

History

Class: RotationallyVariableStellarObject

Definition: Variable stars with nonuniform surface brightness and/or ellipsoidal shapes, whose variability is caused by axial rotation with respect to the observer. The nonuniformity of surface brightness distributions may be caused by the presence of spots or by some thermal or chemical inhomogeneity of the atmosphere caused by a magnetic field whose axis is not coincident with the rotation axis.

URI:	#RotationallyVariableStellarObject
Label:	Rotationally Variable Object
Subclass of	#VariableStellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #RotationallyVariableStellarObject is something that, amongst other things, is a #VariableStellarObject and has (a complex restriction, see schema)

History

Class: SStar

Definition: S-type Star

URI:	#SStar
Label:	S-type Star
Subclass of	#AsymptoticGiantBranchStar
Disjoint with	#CarbonStar and #OHIREnvelopeTypeStar
Paraphrase (experimental)	A #SStar is something that, amongst other things, is a #AsymptoticGiantBranchStar but is not a #CarbonStar and is not a #OHIREnvelopeTypeStar

History

Class: SemiDetached

Definition:

URI:	#SemiDetached
Subclass of	#Close
Paraphrase (experimental)	A #SemiDetached is something that, amongst other things, is a #Close

History

Class: SemiRegularPulsatingStar

Definition: Semi-regular Pulsating Star

URI:	#SemiRegularPulsatingStar
Label:	Semi-regular pulsating star
Label:	Semi-regular Pulsating Star
Subclass of	#LongPeriodVariable
Disjoint with	#LTypeIrregularStar and #MiraCeti
Paraphrase (experimental)	A #SemiRegularPulsatingStar is something that, amongst other things, is a #LongPeriodVariable but is not a #LTypeIrregularStar and is not a #MiraCeti

History

Class: Seyfert15AGN

Definition: Seyfert 1.5 Galaxy

URI:	#Seyfert15AGN
Label:	Type1.5 Seyfert Active Galactic Nucleus
Label:	Seyfert 1.5 Galaxy
Subclass of	#LowPowerRadioQuietAGN_Seyfert
Disjoint with	#Seyfert1AGN and #Seyfert2AGN
Paraphrase (experimental)	A #Seyfert15AGN is something that, amongst other things, is a #LowPowerRadioQuietAGN_Seyfert but is not a #Seyfert1AGN and is not a #Seyfert2AGN

History

Class: Seyfert1AGN

Definition: Seyfert 1 Galaxy

URI:	#Seyfert1AGN
Label:	Type1 Seyfert Active Galactic Nucleus
Label:	Seyfert 1 Galaxy
Subclass of	#LowPowerRadioQuietAGN_Seyfert
Disjoint with	#Seyfert15AGN and #Seyfert2AGN
Paraphrase (experimental)	A #Seyfert1AGN is something that, amongst other things, is a #LowPowerRadioQuietAGN_Seyfert but is not a #Seyfert15AGN and is not a #Seyfert2AGN

History

Class: Seyfert2AGN

Definition: Seyfert 2 Galaxy

URI:	#Seyfert2AGN
Label:	Type2 Seyfert Active Galactic Nucleus
Label:	Seyfert 2 Galaxy
Subclass of	#LowPowerRadioQuietAGN_Seyfert
Disjoint with	#Seyfert15AGN and #Seyfert1AGN
Paraphrase (experimental)	A #Seyfert2AGN is something that, amongst other things, is a #LowPowerRadioQuietAGN_Seyfert but is not a #Seyfert15AGN and is not a #Seyfert1AGN

History

Class: Shell

Definition: Shell

URI:	#Shell
Label:	Shell
Subclass of	#AstroPortion
Paraphrase (experimental)	A #Shell is something that, amongst other things, is a #AstroPortion

History

Class: Shockwave

Definition: Shockwave

URI:	#Shockwave
Label:	The shockwave-generating process or the resulting Shockwave
Label:	Shockwave
Subclass of	#Process
Paraphrase (experimental)	A #Shockwave is something that, amongst other things, is a #Process

History

Class: SmallSeparationRadioLobes

Definition:

URI:	#SmallSeparationRadioLobes
Subclass of	#Morphology and (composite term, see schema)
Disjoint with	#LargeSeparationRadioLobes
Paraphrase (experimental)	A #SmallSeparationRadioLobes is something that, amongst other things, is a #Morphology and something that, amongst other things, is a but is not a #LargeSeparationRadioLobes

History

Class: SpaceVelocity

Definition: Space Velocity

URI:	#SpaceVelocity
Label:	Space Velocity
Subclass of	#Velocity
Disjoint with	#VelocityDispersion
Paraphrase (experimental)	A #SpaceVelocity is something that, amongst other things, is a #Velocity but is not a #VelocityDispersion

History

Class: SpectralIndex

Definition: Spectral Index

URI:	#SpectralIndex
Label:	Spectral Index
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #Spectrum, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #SpectralIndex is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: SpectralType

Definition: Spectral Type

URI:	#SpectralType
Label:	Any class in Morgan Keeman's spectral classification
Label:	Spectral Type
Subclass of	#ClassificationCategory
Paraphrase (experimental)	A #SpectralType is something that, amongst other things, is a #ClassificationCategory

History

Class: SpectralTypeA

Definition:

URI:	#SpectralTypeA
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeB, #SpectralTypeC, #SpectralTypeDA, #SpectralTypeDB, #SpectralTypeDC, #SpectralTypeDH, #SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeA is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeB and is not a #SpectralTypeC and is not a #SpectralTypeDA and is not a #SpectralTypeDB and is not a #SpectralTypeDC and is not a #SpectralTypeDH and is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeB

Definition:

URI:	#SpectralTypeB
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeC, #SpectralTypeDA, #SpectralTypeDB, #SpectralTypeDC, #SpectralTypeDH, #SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeB is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeC and is not a #SpectralTypeDA and is not a #SpectralTypeDB and is not a #SpectralTypeDC and is not a #SpectralTypeDH and is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeC

Definition:

URI:	#SpectralTypeC
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDA, #SpectralTypeDB, #SpectralTypeDC, #SpectralTypeDH, #SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeC is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDA and is not a #SpectralTypeDB and is not a #SpectralTypeDC and is not a #SpectralTypeDH and is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDA

Definition: white dwarf with hydrogen lines

URI:	#SpectralTypeDA
Label:	white dwarf with hydrogen lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDB, #SpectralTypeDC, #SpectralTypeDH, #SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDA is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDB and is not a #SpectralTypeDC and is not a #SpectralTypeDH and is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDB

Definition: white dwarf with He I lines

URI:	#SpectralTypeDB
Label:	white dwarf with He I lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDC, #SpectralTypeDH, #SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDB is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDC and is not a #SpectralTypeDH and is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDC

Definition: white dwarfs with continuous spectrum

URI:	#SpectralTypeDC
Label:	white dwarfs with continuous spectrum
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDH, #SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDC is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDH and is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDH

Definition:

URI:	#SpectralTypeDH
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDO, #SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDH is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDO and is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDO

Definition: white dwarf with He II lines

URI:	#SpectralTypeDO
Label:	white dwarf with He II lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDP, #SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDO is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDP and is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDP

Definition: White dwarf with metal lines

URI:	#SpectralTypeDP
Label:	White dwarf with metal lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDQ, #SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDP is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDQ and is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDQ

Definition: white dwarfs with carbon lines

URI:	#SpectralTypeDQ
Label:	white dwarfs with carbon lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDX, #SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDQ is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDX and is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDX

Definition: White dwarf with metal lines

URI:	#SpectralTypeDX
Label:	White dwarf with metal lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeDZ, #SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDX is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeDZ and is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeDZ

Definition: White dwarf with metal lines

URI:	#SpectralTypeDZ
Label:	White dwarf with metal lines
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeF, #SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeDZ is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeF and is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeF

Definition:

URI:	#SpectralTypeF
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeG, #SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeF is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeG and is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeG

Definition:

URI:	#SpectralTypeG
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeK, #SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeG is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeK and is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeK

Definition:

URI:	#SpectralTypeK
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeL, #SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeK is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeL and is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeL

Definition:

URI:	#SpectralTypeL
Subclass of	#SpectralType
Disjoint with	#SpectralTypeM, #SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeL is something that, amongst other things, is a #SpectralType but is not a #SpectralTypeM and is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeM

Definition:

URI:	#SpectralTypeM
Subclass of	#SpectralType
Disjoint with	#SpectralTypeO, #SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeM is something that, amongst other things, is a #SpectralType but is not a #SpectralTypeO and is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeO

Definition:

URI:	#SpectralTypeO
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeS and #SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeO is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeS and is not a #SpectralTypeT

History

Class: SpectralTypeS

Definition:

URI:	#SpectralTypeS
Subclass of	#SpectralType, (a composite term, see schema)
Disjoint with	#SpectralTypeT
Paraphrase (experimental)	A #SpectralTypeS is something that, amongst other things, is a #SpectralType and has (a complex restriction, see schema) but is not a #SpectralTypeT

History

Class: SpectralTypeT

Definition:

URI:	#SpectralTypeT
Subclass of	#SpectralType
Paraphrase (experimental)	A #SpectralTypeT is something that, amongst other things, is a #SpectralType

History

Class: SpectroscopicBinary

Definition: Spectroscopic Binary

URI:	#SpectroscopicBinary
Label:	Spectroscopic Binary
Subclass of	#DoubleStar and #VariableStellarObject
Disjoint with	#CataclysmicVariable
Paraphrase (experimental)	A #SpectroscopicBinary is something that, amongst other things, is a #DoubleStar and is a #VariableStellarObject but is not a #CataclysmicVariable

History

Class: Spectrum

Definition: Spectrum

URI:	#Spectrum
Label:	Spectrum
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #SurfaceBrightness, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Spectrum is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: SpiralArm

Definition: Spiral Arm

URI:	#SpiralArm
Label:	Spiral Arm of a galaxy
Label:	Spiral Arm
Subclass of	#PortionOfGalaxy
Disjoint with	#Halo and #OldDisk
Paraphrase (experimental)	A #SpiralArm is something that, amongst other things, is a #PortionOfGalaxy but is not a #Halo and is not a #OldDisk

History

Class: SpiralGalaxy

Definition: Spiral Galaxy

URI:	#SpiralGalaxy
Label:	Spiral Galaxy
Subclass of	#Galaxy
Paraphrase (experimental)	A #SpiralGalaxy is something that, amongst other things, is a #Galaxy

History

Class: Star

Definition: Star

URI:	#Star
Label:	Star
Subclass of	#StellarObject, (a composite term, see schema)
Disjoint with	#StellarRemnant
Paraphrase (experimental)	A #Star is something that, amongst other things, is a #StellarObject and has no more than 1 #hasComponent property but is not a #StellarRemnant

History

Class: Starburst

Definition: Starburst Process

URI:	#Starburst
Label:	Starburst Process
Subclass of	#Process
Paraphrase (experimental)	A #Starburst is something that, amongst other things, is a #Process

History

Class: StarburstGalaxy

Definition: Starburst Galaxy

URI:	#StarburstGalaxy
Label:	Starburst Galaxy
Subclass of	#Galaxy, #InfraredSource and #RadioSource
Disjoint with	#HIIRegion, #HIRegion, #LowPowerRadioQuietAGN_Seyfert, #MiraCeti, #MolecularCloud, #OHIREnvelopeTypeStar, #Pulsar, #RadioGalaxy, #RadioLoudAGN, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #StarburstGalaxy is something that, amongst other things, is a #Galaxy and is a #InfraredSource and is a #RadioSource but is not a #HIIRegion and is not a #HIRegion and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MiraCeti and is not a #MolecularCloud and is not a #OHIREnvelopeTypeStar and is not a #Pulsar and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: SteepSpectrumRadioQuasar

Definition: Steep-spectrum Radio Quasar

URI:	#SteepSpectrumRadioQuasar
Label:	Steep-spectrum Radio Quasar
Subclass of	#HighPowerRadioLoudAGN
Disjoint with	#FanaroffRileyTypeII and #FlatSpectrumRadioQuasar
Paraphrase (experimental)	A #SteepSpectrumRadioQuasar is something that, amongst other things, is a #HighPowerRadioLoudAGN but is not a #FanaroffRileyTypeII and is not a #FlatSpectrumRadioQuasar

History

Class: StellarBlackHole

Definition: Stellar Black Hole

URI:	#StellarBlackHole
Label:	Stellar Black Hole
Subclass of	#StellarRemnant
Disjoint with	#NeutronStar, #PlanetaryNebulaCentralStar and #WhiteDwarf
Paraphrase (experimental)	A #StellarBlackHole is something that, amongst other things, is a #StellarRemnant but is not a #NeutronStar and is not a #PlanetaryNebulaCentralStar and is not a #WhiteDwarf

History

Class: StellarObject

Definition: Stellar Object

URI:	#StellarObject
Label:	Stellar Object
Subclass of	#AstrObject, (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #GalaxyPair, #InterStellarMedium, #SuperClusterOfGalaxies, #SupermassiveBlackHole and #Supernova
Paraphrase (experimental)	A #StellarObject is something that, amongst other things, is a #AstrObject and has (a complex restriction, see schema) but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #InterStellarMedium and is not a #SuperClusterOfGalaxies and is not a #SupermassiveBlackHole and is not a #Supernova

History

Class: StellarObjectInAssociation

Definition: Stellar Object in Association

URI:	#StellarObjectInAssociation
Label:	Stellar Object in Association
Subclass of	#EarlyTypeStar, #StellarObjectInCluster and (a composite term, see schema)
Paraphrase (experimental)	A #StellarObjectInAssociation is something that, amongst other things, is a #EarlyTypeStar and is a #StellarObjectInCluster and has (a complex restriction, see schema)

History

Class: StellarObjectInCluster

Definition: Stellar Object in Cluster

URI:	#StellarObjectInCluster
Label:	An individual star located in a star cluster
Label:	Stellar Object in Cluster
Subclass of	#StellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #StellarObjectInCluster is something that, amongst other things, is a #StellarObject and has (a complex restriction, see schema)

History

Class: StellarObjectInDoubleStar

Definition: Stellar Object in Double Star

URI:	#StellarObjectInDoubleStar
Label:	A star that is part of a double star
Label:	Stellar Object in Double Star
Subclass of	#StellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #StellarObjectInDoubleStar is something that, amongst other things, is a #StellarObject and has (a complex restriction, see schema)

History

Class: StellarObjectInNebula

Definition: Stellar Object in Nebula

URI:	#StellarObjectInNebula
Label:	Stellar Object in Nebula
Subclass of	#StellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #StellarObjectInNebula is something that, amongst other things, is a #StellarObject and has (a complex restriction, see schema)

History

Class: StellarRemnant

Definition: Stellar Remnant

URI:	#StellarRemnant
Label:	Stellar Remnant
Subclass of	#StellarObject, (a composite term, see schema)
Disjoint with	#Star and #YoungStellarObject
Paraphrase (experimental)	A #StellarRemnant is something that, amongst other things, is a #StellarObject and has no more than 1 #hasComponent property but is not a #Star and is not a #YoungStellarObject

History

Class: SubDwarfStar

Definition: Subdwarf

URI:	#SubDwarfStar
Label:	Star of LuminosityClass VI
Label:	Subdwarf
Subclass of	#Star and (a composite term, see schema)
Paraphrase (experimental)	A #SubDwarfStar is something that, amongst other things, is a #Star and has (a complex restriction, see schema)

History

Class: SubGiantStar

Definition: Subgiant

URI:	#SubGiantStar
Label:	Star of Luminosity Class IV
Label:	Subgiant
Subclass of	#Star and (a composite term, see schema)
Paraphrase (experimental)	A #SubGiantStar is something that, amongst other things, is a #Star and has (a complex restriction, see schema)

History

Class: SubMillimetricRadioSource

Definition: Sub-millimetric Radio Source

URI:	#SubMillimetricRadioSource
Label:	Sub-millimetric Radio Source
Subclass of	#RadioSource and (a composite term, see schema)
Paraphrase (experimental)	A #SubMillimetricRadioSource is something that, amongst other things, is a #RadioSource and has (a complex restriction, see schema)

History

Class: SubStellarObject

Definition: Substellar Object

URI:	#SubStellarObject
Label:	Substellar Object
Subclass of	#AstrObject
Disjoint with	#SupermassiveBlackHole, #Supernova, #Unknown and #VariableStellarObject
Paraphrase (experimental)	A #SubStellarObject is something that, amongst other things, is a #AstrObject but is not a #SupermassiveBlackHole and is not a #Supernova and is not a #Unknown and is not a #VariableStellarObject

History

Class: SuperClusterOfGalaxies

Definition: Super Cluster of Galaxies

URI:	#SuperClusterOfGalaxies
Label:	Super Cluster of Galaxies
Subclass of	#CompoundObject, (a composite term, see schema)
Disjoint with	#AGN, #AssociationOfStars, #ClusterOfGalaxies, #ClusterOfStars, #GalaxiesGroup, #Galaxy, #GalaxyPair, #MultipleStar, #PlanetaryNebula and #StellarObject
Paraphrase (experimental)	A #SuperClusterOfGalaxies is something that, amongst other things, is a #CompoundObject and has (a complex restriction, see schema) but is not a #AGN and is not a #AssociationOfStars and is not a #ClusterOfGalaxies and is not a #ClusterOfStars and is not a #GalaxiesGroup and is not a #Galaxy and is not a #GalaxyPair and is not a #MultipleStar and is not a #PlanetaryNebula and is not a #StellarObject

History

Class: SuperGiantStar

Definition: Supergiant

URI:	#SuperGiantStar
Label:	Star of Luminosity Class I
Label:	Supergiant
Subclass of	#Star and (a composite term, see schema)
Paraphrase (experimental)	A #SuperGiantStar is something that, amongst other things, is a #Star and has (a complex restriction, see schema)

History

Class: SuperNovaExplosionCoreCollapse

Definition: Core Collapse Supernova Explosion

URI:	#SuperNovaExplosionCoreCollapse
Label:	Core Collapse Supernova Explosion
Subclass of	#SupernovaExplosion
Disjoint with	#SuperNovaExplosionThermonuclear
Paraphrase (experimental)	A #SuperNovaExplosionCoreCollapse is something that, amongst other things, is a #SupernovaExplosion but is not a #SuperNovaExplosionThermonuclear

History

Class: SuperNovaExplosionThermonuclear

Definition: Thermonuclear Supernova Explosion

URI:	#SuperNovaExplosionThermonuclear
Label:	Thermonuclear Supernova Explosion
Subclass of	#SupernovaExplosion
Disjoint with	#SuperNovaExplosionCoreCollapse
Paraphrase (experimental)	A #SuperNovaExplosionThermonuclear is something that, amongst other things, is a #SupernovaExplosion but is not a #SuperNovaExplosionCoreCollapse

History

Class: SuperNovaTypeI

Definition: Supernova type I

URI:	#SuperNovaTypeI
Label:	Supernova type I
Subclass of	#Supernova and (composite term, see schema)
Disjoint with	#SuperNovaTypeII
Paraphrase (experimental)	A #SuperNovaTypeI is something that, amongst other things, is a #Supernova and something that, amongst other things, is a but is not a #SuperNovaTypeII

History

Class: SuperNovaTypeII

Definition: Supernova type II

URI:	#SuperNovaTypeII
Label:	Supernova type II
Subclass of	#Supernova, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#SuperNovaTypeI
Paraphrase (experimental)	A #SuperNovaTypeII is something that, amongst other things, is a #Supernova and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #SuperNovaTypeI

History

Class: SuperNovaTypeIILP

Definition: Supernova type IILP

URI:	#SuperNovaTypeIILP
Label:	Supernova type IILP
Subclass of	#SuperNovaTypeII and (composite term, see schema)
Disjoint with	#SuperNovaTypeIIb
Paraphrase (experimental)	A #SuperNovaTypeIILP is something that, amongst other things, is a #SuperNovaTypeII and something that, amongst other things, is a but is not a #SuperNovaTypeIIb

History

Class: SuperNovaTypeIIb

Definition: Supernova type IIb

URI:	#SuperNovaTypeIIb
Label:	Supernova type IIb
Subclass of	#SuperNovaTypeII, (a composite term, see schema)
Disjoint with	#SuperNovaTypeIILP
Paraphrase (experimental)	A #SuperNovaTypeIIb is something that, amongst other things, is a #SuperNovaTypeII and has (a complex restriction, see schema) but is not a #SuperNovaTypeIILP

History

Class: SuperNovaTypeIa

Definition: Supernova type Ia

URI:	#SuperNovaTypeIa
Label:	Supernova type Ia
Subclass of	#SuperNovaTypeI, (a composite term, see schema), (a composite term, see schema)
Disjoint with	#SuperNovaTypeIb and #SuperNovaTypeIc
Paraphrase (experimental)	A #SuperNovaTypeIa is something that, amongst other things, is a #SuperNovaTypeI and has (a complex restriction, see schema) and has (a complex restriction, see schema) but is not a #SuperNovaTypeIb and is not a #SuperNovaTypeIc

History

Class: SuperNovaTypeIb

Definition: Supernova type Ib

URI:	#SuperNovaTypeIb
Label:	Supernova type Ib
Subclass of	#SuperNovaTypeI, (a composite term, see schema), (composite term, see schema), (a composite term, see schema)
Disjoint with	#SuperNovaTypeIa and #SuperNovaTypeIc
Paraphrase (experimental)	A #SuperNovaTypeIb is something that, amongst other things, is a #SuperNovaTypeI and has (a complex restriction, see schema) and something that, amongst other things, is a and has (a complex restriction, see schema) but is not a #SuperNovaTypeIa and is not a #SuperNovaTypeIc

History

Class: SuperNovaTypeIc

Definition: Supernova type Ic

URI:	#SuperNovaTypeIc
Label:	Supernova type Ic
Subclass of	#SuperNovaTypeI, (composite term, see schema) and (composite term, see schema)
Disjoint with	#SuperNovaTypeIa and #SuperNovaTypeIb
Paraphrase (experimental)	A #SuperNovaTypeIc is something that, amongst other things, is a #SuperNovaTypeI and something that, amongst other things, is a and something that, amongst other things, is a but is not a #SuperNovaTypeIa and is not a #SuperNovaTypeIb

History

Class: SupermassiveBlackHole

Definition: Supermassive Black Hole

URI:	#SupermassiveBlackHole
Label:	Supermassive Black Hole
Subclass of	#AstrObject
Disjoint with	#Supernova, #Unknown and #VariableStellarObject
Paraphrase (experimental)	A #SupermassiveBlackHole is something that, amongst other things, is a #AstrObject but is not a #Supernova and is not a #Unknown and is not a #VariableStellarObject

History

Class: Supernova

Definition: supernova

URI:	#Supernova
Label:	supernova
Subclass of	#AstrObject, (a composite term, see schema)
Disjoint with	#StellarObject and #Unknown
Paraphrase (experimental)	A #Supernova is something that, amongst other things, is a #AstrObject and has (a complex restriction, see schema) but is not a #StellarObject and is not a #Unknown

History

Class: SupernovaExplosion

Definition: Supernova Explosion

URI:	#SupernovaExplosion
Label:	Supernova Explosion
Subclass of	#Explosion and (a composite term, see schema)
Paraphrase (experimental)	A #SupernovaExplosion is something that, amongst other things, is a #Explosion and has (a complex restriction, see schema)

History

Class: SupernovaRemnantShell

Definition: Supernova Remnant Shell

URI:	#SupernovaRemnantShell
Label:	Supernova Remnant Shell
Subclass of	#EmissionNebula, #RadioSource, #XRaySource, (a composite term, see schema)
Disjoint with	#HIIRegion, #HIRegion, #LowPowerRadioQuietAGN_Seyfert, #MolecularCloud, #PlanetaryNebulaShell, #Pulsar, #RSCanumVenaticorum, #RadioGalaxy, #RadioLoudAGN, #StarburstGalaxy, #TTauri and #XRayBinary
Paraphrase (experimental)	A #SupernovaRemnantShell is something that, amongst other things, is a #EmissionNebula and is a #RadioSource and is a #XRaySource and has (a complex restriction, see schema) but is not a #HIIRegion and is not a #HIRegion and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MolecularCloud and is not a #PlanetaryNebulaShell and is not a #Pulsar and is not a #RSCanumVenaticorum and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #TTauri and is not a #XRayBinary

History

Class: SurfaceBrightness

Definition: Surface Brightness

URI:	#SurfaceBrightness
Label:	for extended objects
Label:	Surface Brightness
Subclass of	#Measurement, (a composite term, see schema)
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #Temperature, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #SurfaceBrightness is something that, amongst other things, is a #Measurement and has (a complex restriction, see schema) but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #Temperature and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: SymbioticStar

Definition: Symbiotic variables of the Z Andromedae type. They are close binaries consisting of a hot star, a star of late type, and an extended envelope excited by the hot star's radiation. The combined brightness displays irregular variations with amplitudes up to 4 mag in V. A very inhomogeneous group of objects.

URI:	#SymbioticStar
Label:	Symbiotic Star
Subclass of	#DoubleStar, #VariableStellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #SymbioticStar is something that, amongst other things, is a #DoubleStar and is a #VariableStellarObject and has (a complex restriction, see schema)

History

Class: SynchrotronEmission

Definition: Synchrotron Emission

URI:	#SynchrotronEmission
Label:	Synchrotron Emission
Subclass of	#Emission
Paraphrase (experimental)	A #SynchrotronEmission is something that, amongst other things, is a #Emission

History

Class: TTauri

Definition: T Tauri Star

URI:	#TTauri
Label:	near IR emission, age around 10^6years
Label:	T Tauri Star
Subclass of	#NearInfraredSource, #OrionVariableStar, #RadioSource, #RotationallyVariableStellarObject and #XRaySource
Disjoint with	#Alpha2CanumVenaticorum, #EllipsoidalVariableStar, #HIIRegion, #HIRegion, #LowPowerRadioQuietAGN_Seyfert, #MolecularCloud, #Pulsar, #RSCanumVenaticorum, #RadioGalaxy, #RadioLoudAGN, #StarburstGalaxy, #SupernovaRemnantShell and #XRayBinary
Paraphrase (experimental)	A #TTauri is something that, amongst other things, is a #NearInfraredSource and is a #OrionVariableStar and is a #RadioSource and is a #RotationallyVariableStellarObject and is a #XRaySource but is not a #Alpha2CanumVenaticorum and is not a #EllipsoidalVariableStar and is not a #HIIRegion and is not a #HIRegion and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #MolecularCloud and is not a #Pulsar and is not a #RSCanumVenaticorum and is not a #RadioGalaxy and is not a #RadioLoudAGN and is not a #StarburstGalaxy and is not a #SupernovaRemnantShell and is not a #XRayBinary

History

Class: Temperature

Definition: temperature

URI:	#Temperature
Label:	temperature
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #VariabilityTimeScale and #Velocity
Paraphrase (experimental)	A #Temperature is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #VariabilityTimeScale and is not a #Velocity

History

Class: UltraViolet

Definition: Ultraviolet

URI:	#UltraViolet
Label:	Ultraviolet
Subclass of	#EMSpectrumRange
Disjoint with	#GammaRays, #Infrared, #Optical, #Radio and #XRays
Paraphrase (experimental)	A #UltraViolet is something that, amongst other things, is a #EMSpectrumRange but is not a #GammaRays and is not a #Infrared and is not a #Optical and is not a #Radio and is not a #XRays

History

Class: UltraVioletSource

Definition: UV Source

URI:	#UltraVioletSource
Label:	UV Source
Subclass of	#EMSource and (a composite term, see schema)
Paraphrase (experimental)	A #UltraVioletSource is something that, amongst other things, is a #EMSource and has (a complex restriction, see schema)

History

Class: Unknown

Definition: Object of unknown nature

URI:	#Unknown
Label:	Object of unknown nature
Subclass of	#AstrObject
Disjoint with	#CompoundObject, #EMSource, #InterStellarMedium, #SubStellarObject, #SupermassiveBlackHole and #Supernova
Paraphrase (experimental)	A #Unknown is something that, amongst other things, is a #AstrObject but is not a #CompoundObject and is not a #EMSource and is not a #InterStellarMedium and is not a #SubStellarObject and is not a #SupermassiveBlackHole and is not a #Supernova

History

Class: VariabilityTimeScale

Definition: Variability Time Scale

URI:	#VariabilityTimeScale
Label:	Variability Time Scale
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature and #Velocity
Paraphrase (experimental)	A #VariabilityTimeScale is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #Velocity

History

Class: VariableStellarObject

Definition: DOUBLE MODE VARIABLE STARSVARIABLE STARS

URI:	#VariableStellarObject
Subclass of	#StellarObject and (a composite term, see schema)
Paraphrase (experimental)	A #VariableStellarObject is something that, amongst other things, is a #StellarObject and has (a complex restriction, see schema)

History

Class: Velocity

Definition: Velocity

URI:	#Velocity
Label:	Velocity
Subclass of	#Measurement
Disjoint with	#AbsoluteMagnitude, #Abundances, #Age, #Continuum, #Distance, #EquivalentWidth, #Flux, #FluxAmplitudeVariation, #FluxRatio, #InclinationWrtLOS, #LightCurve, #LineWidth, #LumX, #MagneticField, #Mass, #Parallax, #Period, #Polarization, #PowerRadio, #SpectralIndex, #Spectrum, #SurfaceBrightness, #Temperature and #VariabilityTimeScale
Paraphrase (experimental)	A #Velocity is something that, amongst other things, is a #Measurement but is not a #AbsoluteMagnitude and is not a #Abundances and is not a #Age and is not a #Continuum and is not a #Distance and is not a #EquivalentWidth and is not a #Flux and is not a #FluxAmplitudeVariation and is not a #FluxRatio and is not a #InclinationWrtLOS and is not a #LightCurve and is not a #LineWidth and is not a #LumX and is not a #MagneticField and is not a #Mass and is not a #Parallax and is not a #Period and is not a #Polarization and is not a #PowerRadio and is not a #SpectralIndex and is not a #Spectrum and is not a #SurfaceBrightness and is not a #Temperature and is not a #VariabilityTimeScale

History

Class: VelocityDispersion

Definition: VELOCITY DISPERSION

URI:	#VelocityDispersion
Subclass of	#Velocity
Paraphrase (experimental)	A #VelocityDispersion is something that, amongst other things, is a #Velocity

History

Class: WVirginisStar

Definition: Variables of the W Virginis type. These are pulsating variables of the galactic spherical component (old disk) population with periods of approximately 0.8 to 35 days and amplitudes from 0.3 to 1.2 mag in V. They obey a period-luminosity relation different from that for Delta Cep variables. For an equal period value, the W Vir variables are fainter than the Delta Cep stars by 0.7 - 2 mag. The light curves of W Vir variables for some period intervals differ from those of Delta Cep variables for corresponding periods either by amplitudes or by the presence of humps on their descending branches, sometimes turning into broad flat maxima. W Vir variables are present in globular clusters and at high galactic latitudes.

URI:	#WVirginisStar
Label:	Variable Star of W Vir type
Label:	W Virginis Variable Star
Subclass of	#PulsatingStellarObject
Disjoint with	#BetaCephei, #Cepheid, #DeltaScuti, #GammaDoradus, #LongPeriodVariable, #PulsatingAlpha2CVn, #PulsatingWhiteDwarf, #RCoronaeBorealis, #RRLyrae and #RVTauri
Paraphrase (experimental)	A #WVirginisStar is something that, amongst other things, is a #PulsatingStellarObject but is not a #BetaCephei and is not a #Cepheid and is not a #DeltaScuti and is not a #GammaDoradus and is not a #LongPeriodVariable and is not a #PulsatingAlpha2CVn and is not a #PulsatingWhiteDwarf and is not a #RCoronaeBorealis and is not a #RRLyrae and is not a #RVTauri

History

Class: WeakLineTTauri

Definition: Weak-line T Tauri Star (WTTS) 1. (Original) Observational, a “solar-type” (M∗ ~0.5M⊙, K7-M0), age ~1 Myr, pre-main sequence star (from HRD location) that has W(Hα) < 10Å. Description: The limit was chosen in order to separate objects which showed the signatures of optically thick accretion disks (based on IRAS + NIR SEDs) from those that appeared to be photospheric. 2. (More modern) Observational, any pre-main sequence star that shows no evidence of accretion based on an age and spectral-type appropriate W(Halpha). Description: Firm inclusion in the class would require additional information from high resolution, high S/N spectra to test for the presence (CTTS) or absence (WTTS) of Hα profiles indicative of accretion, or signatures (e.g., forbidden [OI] or [SII]) of winds driven by accretion. 3. Physical, a young star that is no longer surrounded by an accretion disk. Comments: The definition of WTTS was introduced to link signatures of accretion (Halpha emission; forbidden line emission) diagnosed from the presence/kinematics of gas, with signatures of optically thick disks provided by IR SEDs. The definition that was applied to the initial Taurus sample is obsolete, in the sense that the W(Halpha) = 10Å limit is an appropriate (and only approximate) discriminant for Taurus-age stars with masses ~ 0.5 M⊙. However, the idea of using both gas and dust diagnostics to assess the physical state of the disk is still enormously valuable. In particular, it is by using both SEDs and gas diagnostics that we can probe the evolutionary state of transition/anemic disks and assess/constrain the likely physical cause for the observed SED signature.

URI:	#WeakLineTTauri
Label:	Weak-line T Tauri
Subclass of	#TTauri
Disjoint with	#ClassicalTTauri and #HerbigHaro
Paraphrase (experimental)	A #WeakLineTTauri is something that, amongst other things, is a #TTauri but is not a #ClassicalTTauri and is not a #HerbigHaro

History

Class: WhiteDwarf

Definition: White Dwarf

URI:	#WhiteDwarf
Label:	White Dwarf
Subclass of	#StellarRemnant
Disjoint with	#NeutronStar, #PlanetaryNebulaCentralStar and #StellarBlackHole
Paraphrase (experimental)	A #WhiteDwarf is something that, amongst other things, is a #StellarRemnant but is not a #NeutronStar and is not a #PlanetaryNebulaCentralStar and is not a #StellarBlackHole

History

Class: WolfRayetStar

Definition: Wolf-Rayet Star

URI:	#WolfRayetStar
Label:	Wolf-Rayet Star
Subclass of	#EmissionLineStar
Disjoint with	#BeStar
Paraphrase (experimental)	A #WolfRayetStar is something that, amongst other things, is a #EmissionLineStar but is not a #BeStar

History

Class: XRayBinary

Definition: Close binary systems that are sources of strong, variable X-ray emission and which do not belong to or are not yet attributed to any other type of variable stars. One of the components of the system is a hot compact object (white dwarf, neutron star, or possibly a black hole). X-ray emission originates from the infall of matter onto the compact object or onto an accretion disk surrounding the compact object. In turn, the X-ray emission is incident upon the atmosphere of the cooler companion of the compact object and is reradiated in the form of optical high-temperature radiation (reflection effect), thus making that area of the cooler companion's surface an earlier spectral type.

URI:	#XRayBinary
Label:	X-ray Binary
Subclass of	#DoubleStar, #VariableStellarObject, #XRaySource, (a composite term, see schema)
Disjoint with	#CataclysmicVariable, #LowPowerRadioQuietAGN_Seyfert, #Pulsar, #RSCanumVenaticorum, #SupernovaRemnantShell and #TTauri
Paraphrase (experimental)	A #XRayBinary is something that, amongst other things, is a #DoubleStar and is a #VariableStellarObject and is a #XRaySource and has (a complex restriction, see schema) but is not a #CataclysmicVariable and is not a #LowPowerRadioQuietAGN_Seyfert and is not a #Pulsar and is not a #RSCanumVenaticorum and is not a #SupernovaRemnantShell and is not a #TTauri

History

Class: XRaySource

Definition: X-ray Source

URI:	#XRaySource
Label:	X-ray Source
Subclass of	#EMSource and (a composite term, see schema)
Paraphrase (experimental)	A #XRaySource is something that, amongst other things, is a #EMSource and has (a complex restriction, see schema)

History

Class: XRays

Definition: X-Rays

URI:	#XRays
Label:	X-Rays
Subclass of	#EMSpectrumRange
Disjoint with	#GammaRays, #Infrared, #Optical, #Radio and #UltraViolet
Paraphrase (experimental)	A #XRays is something that, amongst other things, is a #EMSpectrumRange but is not a #GammaRays and is not a #Infrared and is not a #Optical and is not a #Radio and is not a #UltraViolet

History

Class: YoungStellarObject

Definition: Young Stellar Object (YSO) 1. Physical, an object in any of the Stages defined above. (Strom et al. 1975, ARAA, 13, 187) 2. Observational, an object in any of the Classes but with an infrared excess detectable in Spitzer surveys (a definition used by the c2d team to distinguish YSOs from the larger class of pre-mainsequence objects (PMS)

URI:	#YoungStellarObject
Label:	YSO
Subclass of	#StellarObject
Disjoint with	#StellarRemnant
Paraphrase (experimental)	A #YoungStellarObject is something that, amongst other things, is a #StellarObject but is not a #StellarRemnant

URI:	#MISCcomment
Label:	any kind of comment on an element of the ontology
Range	xsd:string

URI:	#hasAbsorptionSpectralLine
Label:	features absorption spectral line(s) for
Domain	#AstrObject
Range	#AtomicElement
Paraphrase (experimental)	Having a #hasAbsorptionSpectralLine implies being something that, amongst other things, is a #AstrObject

URI:	#hasAbundanceOf
Label:	features an abundance of
Domain	#AstrObject
Range	#AtomicElement
Paraphrase (experimental)	Having a #hasAbundanceOf implies being something that, amongst other things, is a #AstrObject

URI:	#hasComponent
Label:	Indicates that the DOMAIN CompoundObject has the RANGE AstrObject among its direct physical components (the RANGE AstrObject cannot be a component of a component of the composite object)
Label:	has among its (direct) components
Domain	#CompoundObject
Range	#AstrObject
Paraphrase (experimental)	Having a #hasComponent implies being something that, amongst other things, is a #CompoundObject

URI:	#hasEmissionIn
Label:	features a noticeable emission in
Domain	(composite term, see schema)
Range	#EMSpectrumRange
Paraphrase (experimental)	Having a #hasEmissionIn implies being something that, amongst other things, is a

URI:	#hasEmissionSpectralLineFor
Label:	features emission spectral line(s) for
Domain	#AstrObject
Range	#AtomicElement
Paraphrase (experimental)	Having a #hasEmissionSpectralLineFor implies being something that, amongst other things, is a #AstrObject

URI:	#hasMeasurement
Label:	Indicates that the DOMAIN AstrObject has the RANGE Measurement among its (observational) measurements
Label:	has among its measurements
Domain	#AstrObject
Range	#Measurement
Paraphrase (experimental)	Having a #hasMeasurement implies being something that, amongst other things, is a #AstrObject

URI:	#hasMorphology
Label:	has among its morphological features
Domain	#AstrObject
Range	#Morphology
Inverse of	#isMorphologyOf
Paraphrase (experimental)	Having a #hasMorphology implies being something that, amongst other things, is a #AstrObject

URI:	#hasPortion
Label:	Indicates that the RANGE AstroPortion can be found whithin the DOMAIN CompoundObject or AstroPortion
Label:	Indicates that the RANGE AstroPortion can be found whithin the DOMAIN CompoundObject or AstroPortion
Domain	(composite term, see schema)
Range	#AstroPortion
Paraphrase (experimental)	Having a #hasPortion implies being something that, amongst other things, is a

URI:	#hasProcess
Label:	Indicates that an astronomical object is the location of a Process/has an attached process
Label:	has among its processes
Domain	#AstrObject
Range	#Process
Inverse of	#isProcessOf
Paraphrase (experimental)	Having a #hasProcess implies being something that, amongst other things, is a #AstrObject

URI:	#hasProgenitor
Label:	Indicates the Progenitor of a Supernova
Label:	has for progenitor
Domain	#Supernova
Range	(composite term, see schema)
Paraphrase (experimental)	Having a #hasProgenitor implies being something that, amongst other things, is a #Supernova

URI:	#isClassificationOf
Label:	is class of
Domain	#ClassificationCategory
Range	#AstrObject
Inverse of	#isClassifiedAs
Paraphrase (experimental)	Having a #isClassificationOf implies being something that, amongst other things, is a #ClassificationCategory

URI:	#isComponentOf
Label:	Indicates that the DOMAIN AstrObject is a direct physical component of the RANGE CompositeObject (not a component of a component of the RANGE CompositeObject)
Label:	is component of
Domain	#AstrObject
Range	#CompoundObject
Inverse of	#hasComponent
Paraphrase (experimental)	Having a #isComponentOf implies being something that, amongst other things, is a #AstrObject

URI:	#isIonizedBy
Label:	Indicates what ionizes the gas of a given ISM
Label:	is ionized by
Domain	#InterStellarMedium
Range	(composite term, see schema)
Paraphrase (experimental)	Having a #isIonizedBy implies being something that, amongst other things, is a #InterStellarMedium

URI:	#isMeasuredFor
Label:	is measured for
Domain	#Measurement
Range	#AstrObject
Inverse of	#hasMeasurement
Paraphrase (experimental)	Having a #isMeasuredFor implies being something that, amongst other things, is a #Measurement

URI:	#isPortionOf
Label:	is portion of
Domain	#AstroPortion
Range	(composite term, see schema)
Inverse of	#hasPortion
Paraphrase (experimental)	Having a #isPortionOf implies being something that, amongst other things, is a #AstroPortion

Ontology of Astronomical Object Types

Table of Contents

Introduction

Changes From Previous Version

Namespace

Summary of Terms

Vocabulary Classes

Class: ADwarfStar

History

Class: AGN

History

Class: AGiantStar

History

Class: AMHerCataclysmicVariable

History

Class: AStar

History

Class: ASubDwarfStar

History

Class: ASubGiantStar

History

Class: ASuperGiantStar

History

Class: AbsoluteMagnitude

History

Class: Abundances

History

Class: AccretingWhiteDwarf

History

Class: Accretion

History

Class: AccretionDisk

History

Class: AccretionPoweredPulsar

History

Class: Age

History

Class: Alpha2CanumVenaticorum

History

Class: AssociationOfStars

History

Class: Asteroid

History

Class: AstrObject

History

Class: AstroPortion

History

Class: AsymptoticGiantBranchStar

History

Class: AtomicElement

History

Class: AtomicElementBe

History

Class: AtomicElementC

History

Class: AtomicElementCa

History

Class: AtomicElementCr

History

Class: AtomicElementF

History

Class: AtomicElementFe

History

Class: AtomicElementH

History

Class: AtomicElementHe

History

Class: AtomicElementLi

History

Class: AtomicElementN

History

Class: AtomicElementNa

History

Class: AtomicElementNe

History

Class: AtomicElementO

History

Class: AtomicElementS

History

Class: AtomicElementSi