Ontology of Astronomical Object Types
type: Ontology
date: 2012-04-13
issued: 2008-05-16
is version of: object-types
comment: The Ontology of Astronomical Object Types is an ontology of classes of astronomical objects. For general discussion, see the IVOA Note at http://www.ivoa.net/Documents/Notes/AstrObjectOntology/ and the collection of use-cases at http://www.ivoa.net/Documents/Notes/AstrObjectOntologyUseCases/
creator: Laurent Cambrésy
creator: Sébastien Derriere
creator: Paolo Padovani
creator: Andrea Preite-Martinez
creator: Alexandre Richard
rights: RIGHTS UNCLEAR
preferred namespace uri: http://purl.org/astronomy/ont/object-types
preferred namespace uri: obj
has format: http://purl.org/astronomy/ont/object-types/html
has format: http://purl.org/astronomy/ont/object-types/rdf

http://purl.org/astronomy/ont/object-types/html
type: Text
format: text/html
  type: IMT
  label: HTML

http://purl.org/astronomy/ont/object-types/rdf
type: Text
format: application/rdf+xml
  type: IMT
  label: RDF

ADCkeyword
type: AnnotationProperty
type: DatatypeProperty
comment: Astronomical Data Center keyword
range: string

ADwarfStar
IAU thesaurus label: A DWARF STARS
IAU thesaurus token: ADwarfStars
MIS cgeneric keywords: dwarf##dwarves##A##star##stars##A-type##A
type: Class
subclass of: AStar
subclass of: DwarfStar
disjoint with: AGiantStar
disjoint with: ASubDwarfStar
disjoint with: ASubGiantStar
disjoint with: ASuperGiantStar
disjoint with: BDwarfStar
disjoint with: FDwarfStar
disjoint with: GDwarfStar

AGN
AD ckeyword: Active gal. nuclei
IAU thesaurus alias: agn
IAU thesaurus alias: eruptive galaxies
IAU thesaurus label: ACTIVE GALACTIC NUCLEI
IAU thesaurus label: ACTIVE GALAXIES
IAU thesaurus token: ActiveGalacticNuclei
IAU thesaurus token: ActiveGalaxies
MIS ccomment: Active Galaxy Nucleus
MIS cgeneric keywords: agn##active##galaxy##nucleus##nuclei##galactic
MIS cnatural name: AGN
MIS cregistry alternate single subject: AGN
SIMBA dname: AGN
SIMBA dshort code: AGN
VIZIE rkeyword: AGN
type: Class
subclass of: CompoundObject
subclass of: OpticalSource
subclass of: Restriction
  on property: hasPortion
  some values from: AccretionDisk
subclass of: Class
  complement of: Restriction
    on property: hasComponent
    some values from: Galaxy
subclass of: Restriction
  on property: hasComponent
  some values from: SupermassiveBlackHole
subclass of: Restriction
  on property: isComponentOf
  some values from: Class
    union of: EllipticalGalaxy
    union of: IrregularGalaxy
    union of: SpiralGalaxy
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: InterStellarMedium
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: Pulsar
disjoint with: StellarObject
disjoint with: SubStellarObject
disjoint with: SuperClusterOfGalaxies

AGiantStar
IAU thesaurus label: A GIANT STARS
IAU thesaurus token: AGiantStars
MIS cgeneric keywords: giant##giants##star##stars##A##A-type
type: Class
subclass of: AStar
subclass of: GiantStar
disjoint with: ADwarfStar
disjoint with: ASubDwarfStar
disjoint with: ASubGiantStar
disjoint with: ASuperGiantStar
disjoint with: BGiantStar
disjoint with: GGiantStars

AMHerCataclysmicVariable
GCV scode: AM
IAU thesaurus alias: polars
IAU thesaurus label: AM CANUM VENATICORUM STARS
IAU thesaurus token: AmHerculisStars
MIS ccomment: Cataclysmic Variable Star AM Her type
MIS cgeneric keywords: am##herculis##cataclysmic##variable##star##stars##amherculis##variables
MIS cnatural name: AM Herculis
SIMBA dname: AMHer
SIMBA dshort code: AM*
type: Class
subclass of: CataclysmicVariable
subclass of: Restriction
  on property: hasMeasurement
  some values from: MagneticField
subclass of: Restriction
  all values from: Class
    union of: DwarfStar
    union of: LateTypeStar
    union of: WhiteDwarf
  on property: hasComponent
disjoint with: DQHerCataclysmicVariable
disjoint with: DwarfNova
disjoint with: Nova
disjoint with: NovaLikeObject
disjoint with: RSCanumVenaticorum

AStar
AD ckeyword: Stars, A-type
IAU thesaurus alias: herbig stars
IAU thesaurus label: A STARS
IAU thesaurus label: Ae STARS
IAU thesaurus label: Ap STARS
IAU thesaurus token: AStars
IAU thesaurus token: AeStars
IAU thesaurus token: AmStars
IAU thesaurus token: ApStars
MIS ccomment: Star of Spectral Type A
MIS cgeneric keywords: a##star##astar##stars##astars
MIS cnatural name: A Star
type: Class
subclass of: EarlyTypeStar

ASubDwarfStar
IAU thesaurus label: A SUBDWARF STARS
IAU thesaurus token: ASubdwarfStars
type: Class
subclass of: AStar
subclass of: SubDwarfStar
disjoint with: ADwarfStar
disjoint with: AGiantStar
disjoint with: ASubGiantStar
disjoint with: ASuperGiantStar
disjoint with: BSubDwarfStar
disjoint with: FSubDwarfStar
disjoint with: GSubDwarfStar

ASubGiantStar
IAU thesaurus label: A SUBGIANT STARS
IAU thesaurus token: ASubgiantStars
type: Class
subclass of: AStar
subclass of: SubGiantStar
disjoint with: ADwarfStar
disjoint with: AGiantStar
disjoint with: ASubDwarfStar
disjoint with: ASuperGiantStar
disjoint with: FSubGiantStar
disjoint with: GSubGiantStar

ASuperGiantStar
IAU thesaurus label: A SUPERGIANT STARS
IAU thesaurus token: ASupergiantStars
type: Class
subclass of: AStar
subclass of: SuperGiantStar
disjoint with: ADwarfStar
disjoint with: AGiantStar
disjoint with: ASubDwarfStar
disjoint with: ASubGiantStar
disjoint with: BSuperGiant
disjoint with: FSuperGiantStar
disjoint with: GSuperGiantStar

AbsoluteMagnitude
IAU thesaurus label: ABSOLUTE MAGNITUDE
IAU thesaurus token: AbsoluteMagnitude
MIS cgeneric keywords: absolute##magnitude
MIS cnatural name: Absolute Magnitude
type: Class
subclass of: Measurement
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

Abundances
AD ckeyword: Abundances
AD ckeyword: Abundances, [Fe/H]
AD ckeyword: Abundances, peculiar
IAU thesaurus label: ABUNDANCE
IAU thesaurus token: Abundance
VIZIE rkeyword: Abundances
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

AccretingWhiteDwarf
MIS cgeneric keywords: accreting##white##wd##dwarf
MIS cnatural name: Accreting White Dwarf
type: Class
subclass of: DoubleStar
subclass of: Restriction
  all values from: Class
    union of: GiantStar
    union of: WhiteDwarf
  on property: hasComponent

Accretion
AD ckeyword: Accretion
IAU thesaurus label: ACCRETION
IAU thesaurus token: Accretion
MIS cgeneric keywords: accretion##accreting##process##processes
type: Class
subclass of: Process

AccretionDisk
IAU thesaurus label: ACCRETION DISKS
IAU thesaurus token: Accretion Disks
MIS cdescription: 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.
MIS cgeneric keywords: accretion##disk##disks##disc##discs
MIS cnatural name: Accretion Disk
type: Class
subclass of: Disk
subclass of: Restriction
  all values from: Class
    union of: AGN
    union of: DQHerCataclysmicVariable
    union of: DwarfNova
    union of: FUOrionis
    union of: Galaxy
    union of: Nova
  on property: isPortionOf

AccretionPoweredPulsar
MIS cgeneric keywords: accretion##powerred##pulsar##psr##pulsars##
MIS cnatural name: Accretion-powered Pulsar
type: Class
subclass of: Pulsar
subclass of: StellarObjectInDoubleStar
disjoint with: RotationPoweredPulsar

Age
AD ckeyword: Stars, ages
IAU thesaurus label: AGE
IAU thesaurus token: Age
VIZIE rkeyword: Ages
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

Alpha2CanumVenaticorum
GCV scode: ACV
IAU thesaurus label: ALPHA 2 CANUM VENATICORUM STARS
IAU thesaurus token: Alpha2CanumVenaticorumStars
MIS ccomment: Variable Star of alpha2 CVn type
MIS cdescription: 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.
MIS cgeneric keywords: alpha##2##alpha2##cv##cvn##canum##venaticorum
MIS cnatural name: Alpha2 Canum Venaticorum Variable
SIMBA dname: RotV*alf2CVn
SIMBA dshort code: a2*
type: Class
subclass of: DwarfStar
subclass of: EarlyTypeStar
subclass of: RotationallyVariableStellarObject
subclass of: Restriction
  on property: hasMeasurement
  some values from: MagneticField
subclass of: Class
  union of: AStar
  union of: BStar
disjoint with: BYDraconis
disjoint with: BetaCephei
disjoint with: GammaDoradus
disjoint with: Pulsar
disjoint with: RSCanumVenaticorum
disjoint with: TTauri

AssociationOfStars
AD ckeyword: Associations, stellar
IAU thesaurus label: STAR ASSOCIATIONS
IAU thesaurus token: StarAssociations
MIS cgeneric keywords: association##star##stars##associations
MIS cnatural name: Association of Stars
NE dcode: *Ass
SIMBA dname: Assoc*
SIMBA dshort code: AS*
VIZIE rkeyword: Associations
type: Class
subclass of: CompoundObject
subclass of: Restriction
  all values from: Class
    union of: MultipleStar
    union of: StellarObject
  on property: hasComponent
disjoint with: AGN
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: LINER
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject
disjoint with: SuperClusterOfGalaxies

Asteroid
AD ckeyword: Asteroids
AD ckeyword: Minor planets
IAU thesaurus alias: planetoids
IAU thesaurus label: ASTEROIDS
IAU thesaurus label: MINOR PLANETS
IAU thesaurus token: Asteroids
IAU thesaurus token: MinorPlanets
MIS cgeneric keywords: asteroid##asteroids
MIS cnatural name: Asteroid
type: Class
subclass of: NonStellarBody
disjoint with: Comet
disjoint with: Planet

AstrObject
MIS cdescription: Any astronomical object
MIS cgeneric keywords: astrobject##astroobject##astronomical##object##astrobjects##astroobjects#objects
MIS cnatural name: Astronomical Object
type: Class
disjoint with: AtomicElement
disjoint with: ClassificationCategory
disjoint with: EMSpectrumRange
disjoint with: Measurement
disjoint with: Morphology
disjoint with: Process

AstroPortion
MIS cdescription: Portion of an astronomical object which is not an astronomical object itself
MIS cgeneric keywords: portion##astroportion##portions##astroportions
MIS cnatural name: Portion of Astronomical Object
type: Class
disjoint with: AtomicElement
disjoint with: ClassificationCategory
disjoint with: EMSpectrumRange
disjoint with: Measurement
disjoint with: Morphology
disjoint with: Process

AsymptoticGiantBranchStar
MIS ccomment: Asymptotic Giant Branch Star
MIS cgeneric keywords: asymptotic##giant##branch##star##agb##stars
MIS cnatural name: AGB Star
SIMBA dname: AGB*
SIMBA dshort code: AG*
type: Class
subclass of: LateTypeStar

AtomicElement
IAU thesaurus label: ATOMS
IAU thesaurus token: Atoms
MIS cgeneric keywords: atomic##element
MIS cnatural name: Atomic Element
type: Class
disjoint with: AstrObject
disjoint with: AstroPortion
disjoint with: ClassificationCategory
disjoint with: EMSpectrumRange
disjoint with: Measurement
disjoint with: Morphology
disjoint with: Process

BDwarfStar
IAU thesaurus label: B DWARF STARS
IAU thesaurus token: BDwarfStars
type: Class
subclass of: BStar
subclass of: DwarfStar
disjoint with: ADwarfStar
disjoint with: BGiantStar
disjoint with: BSubDwarfStar
disjoint with: BSuperGiant
disjoint with: BeStar
disjoint with: FDwarfStar
disjoint with: GDwarfStar

BGiantStar
IAU thesaurus label: B GIANT STARS
IAU thesaurus token: BGiantStars
type: Class
subclass of: BStar
subclass of: GiantStar
disjoint with: AGiantStar
disjoint with: BDwarfStar
disjoint with: BSubDwarfStar
disjoint with: BSuperGiant
disjoint with: GGiantStars

BLLacertae
AD ckeyword: BL Lac objects
GCV scode: BLLAC
IAU thesaurus alias: bl lac objects
IAU thesaurus label: BL LACERTAE OBJECTS
IAU thesaurus token: BlLacertaeObjects
MIS ccomment: BL Lacertae Object, Type1 Active Galactic Nucleus
MIS cgeneric keywords: bllac##bl##Lac##object##lacertae##objects##bllacertae#lacertae
MIS cnatural name: BLLac
SIMBA dname: BLLac
SIMBA dshort code: BLL
VIZIE rkeyword: BL_Lac_objects
type: Class
subclass of: LowPowerRadioLoudAGN
disjoint with: FanaroffRileyTypeI

BStar
AD ckeyword: Stars, B-type
IAU thesaurus label: B STARS
IAU thesaurus label: Bw STARS
IAU thesaurus token: BStars
IAU thesaurus token: BwStars
MIS ccomment: Star of Spectral Type B
MIS cgeneric keywords: bstar##b##star##stars##bstars
MIS cnatural name: B Star
type: Class
subclass of: EarlyTypeStar

BSubDwarfStar
IAU thesaurus label: B SUBDWARF STARS
IAU thesaurus token: BSubdwarfStars
type: Class
subclass of: BStar
subclass of: SubDwarfStar
disjoint with: ASubDwarfStar
disjoint with: BDwarfStar
disjoint with: BGiantStar
disjoint with: BSuperGiant
disjoint with: FSubDwarfStar
disjoint with: GSubDwarfStar

BSuperGiant
IAU thesaurus label: B SUPERGIANT STARS
IAU thesaurus token: BSupergiantStars
type: Class
subclass of: BStar
subclass of: SuperGiantStar
disjoint with: ASuperGiantStar
disjoint with: BDwarfStar
disjoint with: BGiantStar
disjoint with: BSubDwarfStar
disjoint with: FSuperGiantStar
disjoint with: GSuperGiantStar
disjoint with: RCoronaeBorealis

BYDraconis
GCV scode: BY
IAU thesaurus label: BY DRACONIS STARS
IAU thesaurus token: ByDraconisStars
MIS ccomment: Varaible Star of BY Dra type
MIS cdescription: 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.
MIS cgeneric keywords: by##draconis##variable##star##stars##variables
MIS cnatural name: BY Draconis Variable
SIMBA dname: BYDra
SIMBA dshort code: BY*
type: Class
subclass of: DwarfStar
subclass of: LateTypeStar
subclass of: RotationallyVariableStellarObject
disjoint with: Alpha2CanumVenaticorum
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: Pulsar
disjoint with: TTauri

BarredSpiralGalaxy
IAU thesaurus alias: galactic bars
IAU thesaurus label: BARRED SPIRAL GALAXIES
IAU thesaurus token: BarredSpiralGalaxies
MIS cgeneric keywords: barred##spiral##galaxy##gal##galaxies##g
MIS cnatural name: Barred Spiral Galaxy
type: Class
subclass of: Galaxy

BeStar
AD ckeyword: Stars, Be
IAU thesaurus alias: Be dwarf stars
IAU thesaurus alias: herbig stars
IAU thesaurus label: Be STARS
IAU thesaurus label: GAMMA CASSIOPEIAE STARS
IAU thesaurus token: BeStars
IAU thesaurus token: GammaCassiopeiaeStars
MIS cgeneric keywords: be##star##bestar##stars##bestars
MIS cnatural name: Be Star
SIMBA dname: Be*
SIMBA dshort code: Be*
type: Class
subclass of: BStar
subclass of: EmissionLineStar
disjoint with: BDwarfStar
disjoint with: WolfRayetStar

BetaCephei
GCV scode: BCEP
IAU thesaurus alias: beta canis majoris stars
IAU thesaurus alias: ultra short period B stars
IAU thesaurus alias: ultra short period variable stars
IAU thesaurus label: 53 PERSEI STARS
IAU thesaurus label: BETA CEPHEI STARS
IAU thesaurus token: 53PerseiStars
IAU thesaurus token: BetaCepheiStars
MIS ccomment: Variable of the Beta Cep type
MIS cdescription: 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.
MIS cgeneric keywords: cephei##cep##beta##cepheid##cma##variables##variable
MIS cnatural name: Beta Cephei Variable
SIMBA dname: PulsV*bCep
SIMBA dshort code: bC*
type: Class
subclass of: EarlyTypeStar
subclass of: PulsatingStellarObject
disjoint with: Alpha2CanumVenaticorum
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: HerbigHaro
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: WVirginisStar

Blazar
IAU thesaurus label: BLAZARS
IAU thesaurus token: Blazars
MIS cgeneric keywords: blazar##blazars
MIS cnatural name: Blazar
SIMBA dname: Blazar
SIMBA dshort code: Bla
type: Class
subclass of: BLLacertae
subclass of: FlatSpectrumRadioQuasar
disjoint with: OpticallyViolentlyVariableQuasar

Blue
MIS cgeneric keywords: blue
MIS cnatural name: Blue
type: Class
subclass of: Optical

BlueCompactGalaxy
MIS cgeneric keywords: blue##compact##galaxy##gal##galaxies##g
MIS cnatural name: Blue Compact Galaxy
SIMBA dname: BlueCompG
SIMBA dshort code: BCG
type: Class
subclass of: Galaxy

BlueObject
AD ckeyword: Blue objects
IAU thesaurus label: BLUE OBJECTS
IAU thesaurus token: BlueObjects
MIS cgeneric keywords: blue##object
MIS cnatural name: Blue Object
NE dcode: Blue*
SIMBA dname: Blue
SIMBA dshort code: blu
VIZIE rkeyword: Blue_objects
type: Class
subclass of: EMSource
disjoint with: RedObject

BlueSuperGiant
MIS cgeneric keywords: blue##super##giant##supergiant##giants##supergiants
MIS cnatural name: Blue Supergiant
type: Class
subclass of: OStar
subclass of: SuperGiantStar

BokGlobule
AD ckeyword: Bok globules
AD ckeyword: Globules
IAU thesaurus label: BOK GLOBULES
IAU thesaurus token: BokGlobules
MIS cgeneric keywords: bok##globule
MIS cnatural name: Bok Globule
type: Class
subclass of: DarkCloud
subclass of: Restriction
  all values from: HIIRegion
  on property: isComponentOf

BrilliantGiantStar
MIS ccomment: Star of Luminosity Class II
MIS cgeneric keywords: brilliant##giant##giants
MIS cnatural name: Brilliant Giant
type: Class
subclass of: Star

BrownDwarf
IAU thesaurus label: BROWN DWARF STARS
IAU thesaurus token: BrownDwarfStars
MIS cgeneric keywords: brown##dwarf##dwarves
MIS cnatural name: Brown Dwarf
type: Class
subclass of: NearInfraredSource
subclass of: StellarObject
subclass of: SubStellarObject
subclass of: Restriction
  max cardinality: 1
  on property: hasComponent
disjoint with: NonStellarBody
disjoint with: Star
disjoint with: TTauri
disjoint with: YoungStellarObject

CHEnvelopeTypeStar
MIS cgeneric keywords: ch##envelope##type##star
MIS cnatural name: CH Envelope-type Star
SIMBA dname: CH*
SIMBA dshort code: CH*
type: Class
subclass of: PeculiarStar

CarbonStar
IAU thesaurus alias: c stars
IAU thesaurus label: CARBON STARS
IAU thesaurus token: CarbonStars
MIS cgeneric keywords: carbon##star##c##cstar##stars##cstars##carbonstars
MIS cnatural name: Carbon Star
NE dcode: C*
SIMBA dname: C*
SIMBA dshort code: C*
type: Class
subclass of: AsymptoticGiantBranchStar
disjoint with: OHIREnvelopeTypeStar
disjoint with: RedSuperGiant
disjoint with: SStar

CataclysmicVariable
AD ckeyword: Binaries, cataclysmic
IAU thesaurus alias: cataclysmic binary stars
IAU thesaurus label: AM CANUM VENATICORUM STARS
IAU thesaurus label: CATACLYSMIC VARIABLE STARS
IAU thesaurus token: AmCanumVenaticorumStars
IAU thesaurus token: CataclysmicVariableStars
MIS cdescription: 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.
MIS cgeneric keywords: cataclysmic##variable##star##stars##binaries##binary##double##cv##variables
MIS cnatural name: Cataclysmic Variable
MIS cregistry alternate single subject: CV
SIMBA dname: CataclyV*
SIMBA dshort code: CV*
VIZIE rkeyword: Binaries:cataclysmic
type: Class
subclass of: DoubleStar
subclass of: EruptiveVariableStellarObject
subclass of: Restriction
  all values from: Class
    union of: DwarfStar
    union of: LateTypeStar
    union of: SubGiantStar
    union of: WhiteDwarf
  on property: hasComponent
disjoint with: EclipsingBinary
disjoint with: OrionVariableStar
disjoint with: RCoronaeBorealis
disjoint with: RapidIrregularVariableStar
disjoint with: SpectroscopicBinary
disjoint with: XRayBinary

CentimetricRadioSource
MIS cgeneric keywords: centimetric##radio##source
MIS cnatural name: Centimetric Radio Source
SIMBA dname: Radio(cm)
SIMBA dshort code: cm
type: Class
subclass of: RadioSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: RadioCentimetric

Cepheid
GCV scode: CEP
IAU thesaurus alias: bump cepheids
IAU thesaurus alias: cepheid variable stars
IAU thesaurus label: CEPHEIDS
IAU thesaurus label: DOUBLE MODE CEPHEIDS
IAU thesaurus label: DWARF CEPHEIDS
IAU thesaurus token: Cepheids
IAU thesaurus token: DoubleModeCepheids
IAU thesaurus token: DwarfCepheids
MIS ccomment: Cepheid variable star
MIS cdescription: 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.
MIS cgeneric keywords: cepheid##cep##cephei##cepeids##variables##variable
MIS cnatural name: Cepheid
SIMBA dname: Cepheid
SIMBA dshort code: Ce*
type: Class
subclass of: PulsatingStellarObject
subclass of: Star
disjoint with: BetaCephei
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: TTauri
disjoint with: WVirginisStar

Chromosphere
IAU thesaurus label: CHROMOSPHERE
IAU thesaurus token: Chromosphere
MIS cgeneric keywords: chromosphere
MIS cnatural name: Chromosphere
type: Class
subclass of: PortionOfStellarObject

ChromosphericActivity
MIS ccomment: Corresponds to an important chromosperic activity, usually a source of emission
MIS cgeneric keywords: chromospheric##activity##chromosphere
MIS cnatural name: Chromospheric Activity
type: Class
subclass of: Process

CircumstellarDisk
IAU thesaurus label: CIRCUMSTELLAR DISKS
IAU thesaurus token: CircumstellarDisks
MIS cdescription: 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.
MIS cgeneric keywords: disc##discs##disk##disks##circumstellar
MIS cnatural name: Circumstellar disk
type: Class
subclass of: Disk
subclass of: PortionOfStellarObject

ClassicalTTauri
MIS cdescription: 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.
MIS cgeneric keywords: ctts##classical##t##tauri##star##tau##stars##ttauri
MIS cnatural name: Classical T Tauri
type: Class
subclass of: TTauri
disjoint with: HerbigHaro
disjoint with: WeakLineTTauri

ClassificationCategory
MIS cgeneric keywords: class##type
MIS cnatural name: Class
type: Class
disjoint with: AstrObject
disjoint with: AstroPortion
disjoint with: AtomicElement
disjoint with: EMSpectrumRange
disjoint with: Measurement
disjoint with: Morphology
disjoint with: Process

Close
MIS cgeneric keywords: close##morphology
MIS cnatural name: Close
type: Class
subclass of: MorphologyCompoundObject
disjoint with: Detached

Cloud
AD ckeyword: Diffuse clouds
IAU thesaurus label: CLOUDS
IAU thesaurus label: DENSE CLOUDS
IAU thesaurus token: Clouds
IAU thesaurus token: DenseClouds
MIS cgeneric keywords: cloud##clouds##cld
type: Class
subclass of: InterStellarMedium
subclass of: Class
  complement of: Restriction
    on property: isIonizedBy
    some values from: Class
      union of: EarlyTypeStar
      union of: Shockwave
disjoint with: Nebula

ClusterOfGalaxies
AD ckeyword: Clusters, galaxy
IAU thesaurus alias: galaxy clustering
IAU thesaurus alias: galaxy clusters
IAU thesaurus label: CLUSTERS OF GALAXIES
IAU thesaurus token: ClustersOfGalaxies
MIS cgeneric keywords: cluster##galaxy##galaxies##clusters##g##gal
MIS cnatural name: Cluster of Galaxies
MIS cregistry alternate single subject: Cluster of Galaxies
MIS cregistry alternate single subject: Clusters of Galaxies
MIS cregistry alternate single subject: clusters of galaxies
NE dcode: GClstr
SIMBA dname: ClG
SIMBA dshort code: ClG
VIZIE rkeyword: Clusters_of_galaxies
type: Class
subclass of: CompoundObject
subclass of: Class
  complement of: GalaxyPair
subclass of: Restriction
  all values from: Class
    union of: GalaxiesGroup
    union of: Galaxy
    union of: GalaxyPair
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: LINER
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject
disjoint with: SuperClusterOfGalaxies

ClusterOfStars
IAU thesaurus alias: clusters of stars
IAU thesaurus label: STAR CLUSTERS
IAU thesaurus token: StarClusters
MIS cgeneric keywords: cluster##star##stars##clusters
MIS cnatural name: Cluster of Stars
MIS cregistry alternate single subject: Star Cluster
NE dcode: *Cl
SIMBA dname: Cl*
SIMBA dshort code: Cl*
type: Class
subclass of: CompoundObject
subclass of: Class
  complement of: MultipleStar
subclass of: Restriction
  all values from: StellarObject
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: LINER
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject
disjoint with: SuperClusterOfGalaxies

Comet
AD ckeyword: Comets
IAU thesaurus label: COMETS
IAU thesaurus token: Comets
MIS cgeneric keywords: comet##comets
MIS cnatural name: Comet
MIS cregistry alternate single subject: Comets
type: Class
subclass of: NonStellarBody
disjoint with: Asteroid
disjoint with: Planet

Compact
IAU thesaurus label: COMPACT GALAXIES
IAU thesaurus label: COMPACT H II REGIONS
IAU thesaurus label: COMPACT NEBULAE
IAU thesaurus label: COMPACT NUCLEI
IAU thesaurus label: COMPACT OBJECTS
IAU thesaurus label: COMPACT SOURCES
IAU thesaurus token: CompactGalaxies
IAU thesaurus token: CompactHIiRegions
IAU thesaurus token: CompactNebulae
IAU thesaurus token: CompactNuclei
IAU thesaurus token: CompactObjects
IAU thesaurus token: CompactSources
MIS cgeneric keywords: compact##morphology
MIS cnatural name: Compact Morphology
type: Class
subclass of: Morphology
subclass of: Class
  complement of: Extended
subclass of: Restriction
  all values from: Class
    union of: InterStellarMedium
    union of: Class
      intersection of: CompoundObject
      intersection of: Class
        complement of: MultipleStar
  on property: isMorphologyOf
disjoint with: Extended

CompoundObject
MIS cdescription: A composite object is made of at least two distinct astronomical objects
MIS cgeneric keywords: compound##composite##object
MIS cnatural name: Compound object
SIMBA dname: multiple_object
SIMBA dshort code: mul
type: Class
subclass of: AstrObject
subclass of: Restriction
  all values from: AstrObject
  on property: hasComponent
subclass of: Restriction
  min cardinality: 2
  on property: hasComponent
disjoint with: Unknown

Contact
IAU thesaurus label: CONTACT BINARY STARS
IAU thesaurus token: ContactBinaryStars
MIS cgeneric keywords: contact
MIS cnatural name: Contact
type: Class
subclass of: Close

Continuum
AD ckeyword: Balmer lines
AD ckeyword: Equivalent widths
AD ckeyword: Line Profiles
AD ckeyword: Multiplet
AD ckeyword: Radio Lines
AD ckeyword: Radio continuum
IAU thesaurus label: CONTINUA
IAU thesaurus label: CONTINUOUS SPECTRA
IAU thesaurus label: CONTINUUM RADIATION
IAU thesaurus token: Continua
IAU thesaurus token: ContinuousSpectra
IAU thesaurus token: ContinuumRadiation
MIS ccomment: Range allowing the description of the existence of a (noticeable) continuum for a given object
MIS cgeneric keywords: continuum
MIS cnatural name: Continuum
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

ContinuumNebular
MIS ccomment: Recombination thermal continuum
MIS cgeneric keywords: nebular##continuum
MIS cnatural name: Nebular Continuum
type: Class
subclass of: Continuum
subclass of: Restriction
  all values from: EmissionNebula
  on property: isMeasuredFor
disjoint with: ContinuumNonThermal
disjoint with: ContinuumThermal

ContinuumNonThermal
MIS cgeneric keywords: continuum##non##not##thermal
MIS cnatural name: Continuum Non-thermal
type: Class
subclass of: Continuum
subclass of: Restriction
  all values from: Class
    union of: BLLacertae
    union of: SupernovaRemnantShell
  on property: isMeasuredFor
disjoint with: ContinuumThermal

ContinuumThermal
MIS ccomment: Black Body thermal continuum
MIS cgeneric keywords: thermal##continuum
MIS cnatural name: Thermal Continuum
type: Class
subclass of: Continuum

CoreDominated
MIS ccomment: Core/Extented Flux Ratio >1
MIS cgeneric keywords: core##dominated##coredominated
MIS cnatural name: Core Dominated
type: Class
subclass of: Morphology
subclass of: Class
  complement of: LobeDominated
disjoint with: LobeDominated

CosmologicalLensing
MIS cgeneric keywords: cosmological##lensing##lens##process#processes
MIS cnatural name: Cosmological Lensing
type: Class
subclass of: Lensing
subclass of: Restriction
  all values from: Class
    union of: LensedGalaxy
    union of: LensedQuasiStellarObject
  on property: isProcessOf
disjoint with: MicroLensing

DQHerCataclysmicVariable
IAU thesaurus label: DQ HERCULIS STARS
IAU thesaurus token: DQHerCataclysmicVariable
MIS ccomment: Cataclysmic Variable Star DQ Her type
MIS cgeneric keywords: dq##herculis##cataclysmic##variable##star##stars##dqherculis##variables
MIS cnatural name: DQ Herculis
SIMBA dname: DQHer
SIMBA dshort code: DQ*
type: Class
subclass of: CataclysmicVariable
subclass of: Restriction
  on property: hasMeasurement
  some values from: MagneticField
subclass of: Class
  complement of: AMHerCataclysmicVariable
disjoint with: AMHerCataclysmicVariable
disjoint with: DwarfNova
disjoint with: Nova
disjoint with: NovaLikeObject
disjoint with: RSCanumVenaticorum

DarkCloud
AD ckeyword: Nebulae, dark
IAU thesaurus label: DARK CLOUDS
IAU thesaurus token: DarkClouds
MIS cgeneric keywords: dark##cloud##nebula
MIS cnatural name: Dark Nebula
SIMBA dname: DkNeb
SIMBA dshort code: DNe
type: Class
subclass of: MolecularCloud

DebrisDisk
MIS cdescription: 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.
MIS cgeneric keywords: debris##disk##disc##disks##discs
MIS cnatural name: Debris disk
type: Class
subclass of: CircumstellarDisk

DeltaCepheid
GCV scode: DCEP
IAU thesaurus alias: classical cepheids
IAU thesaurus alias: delta cephei stars
MIS ccomment: Classical Cepheid (delta Cep type)
MIS cdescription: 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.
MIS cgeneric keywords: delta##cepheid##classical##cep##cephei##cepheids##ceps##variable##variables
MIS cnatural name: Classical Cepheid
SIMBA dname: deltaCep
SIMBA dshort code: cC*
type: Class
subclass of: Cepheid

DeltaScuti
GCV scode: DSCT
IAU thesaurus label: DELTA DELPHINI STARS
IAU thesaurus label: DELTA SCUTI STARS
IAU thesaurus token: DeltaDelphiniStars
IAU thesaurus token: DeltaScutiStars
MIS ccomment: Variable Star of delta sct type
MIS cdescription: 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.
MIS cgeneric keywords: delta##scuti##deltascuti##variable##variables##stars##star
MIS cnatural name: Delta Scuti Variable Star
SIMBA dname: PulsV*delsct
SIMBA dshort code: dS*
type: Class
subclass of: PulsatingStellarObject
subclass of: Star
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: TTauri
disjoint with: WVirginisStar

Disk
MIS cgeneric keywords: disc##discs##disk##disks
MIS cnatural name: Disk
type: Class
subclass of: AstroPortion

Distance
AD ckeyword: Stars, distances
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

DoubleStar
IAU thesaurus alias: binaries
IAU thesaurus alias: binary systems
IAU thesaurus alias: double stars
IAU thesaurus alias: wide binary stars
IAU thesaurus label: BINARY STARS
IAU thesaurus label: CONTACT BINARY STARS
IAU thesaurus label: DETACHED BINARY STARS
IAU thesaurus label: ERUPTIVE BINARY STARS
IAU thesaurus label: EruptiveBinaryStar
IAU thesaurus token: BinaryStars
IAU thesaurus token: ContactBinaryStars
IAU thesaurus token: DetachedBinaryStars
MIS ccomment: A system of two stars
MIS cgeneric keywords: double##star##pair
MIS cnatural name: Double Star
NE dcode: **
SIMBA dname: Double or multiple star
SIMBA dshort code: **
type: Class
subclass of: MultipleStar
subclass of: Restriction
  max cardinality: 2
  on property: hasComponent

Dust
IAU thesaurus label: DUST
IAU thesaurus token: Dust
MIS cgeneric keywords: dust##dusts
MIS cnatural name: Dust
type: Class
subclass of: AstroPortion
subclass of: Restriction
  all values from: ReflectionNebula
  on property: isPortionOf

DwarfBarredSpiralGalaxy
MIS cgeneric keywords: dwarf##barred##spiral##galaxy##gal##galaxies##g
MIS cnatural name: Dwarf Barred Spiral Galaxy
type: Class
subclass of: BarredSpiralGalaxy
subclass of: DwarfGalaxy

DwarfEllipticalGalaxy
MIS cgeneric keywords: dwarf##elliptic##galaxy##gal##galaxies##g
MIS cnatural name: Dwarf Elliptical Galaxy
type: Class
subclass of: EllipticalGalaxy
disjoint with: GiantEllipticalGalaxy

DwarfGalaxy
IAU thesaurus label: DWARF GALAXIES
IAU thesaurus token: DwarfGalaxies
type: Class
subclass of: Galaxy

DwarfIrregularGalaxy
MIS cgeneric keywords: dwarf##irregular##galaxy##gal##galaxies##g
MIS cnatural name: Dwarf Irregular Galaxy
type: Class
subclass of: DwarfGalaxy
subclass of: IrregularGalaxy

DwarfNova
GCV scode: UG
MIS ccomment: Dwarf Nova (U Geminorum-type variable star)
MIS cdescription: 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.
MIS cgeneric keywords: dwarf##nova##novae##u##geminorum
MIS cnatural name: Dwarf Nova
SIMBA dname: DwarfNova
SIMBA dshort code: DN*
type: Class
subclass of: CataclysmicVariable
disjoint with: AMHerCataclysmicVariable
disjoint with: DQHerCataclysmicVariable
disjoint with: RSCanumVenaticorum

DwarfSpiralGalaxy
MIS cgeneric keywords: dwarf##spiral##galaxy##gal##galaxies##g
MIS cnatural name: Dwarf Spiral Galaxy
type: Class
subclass of: DwarfGalaxy
subclass of: SpiralGalaxy

DwarfStar
AD ckeyword: Stars, dwarfs
IAU thesaurus label: DWARF STARS
IAU thesaurus token: DwarfStars
MIS ccomment: Star of Luminosity Class V
MIS cgeneric keywords: dwarves##dwarf
MIS cnatural name: Dwarf
type: Class
subclass of: Star

EMSource
MIS cgeneric keywords: em##source##electromagnetic##electro##magnetic
MIS cnatural name: EM Source
type: Class
subclass of: AstrObject
subclass of: Restriction
  on property: hasEmissionIn
  some values from: EMSpectrumRange
disjoint with: Unknown

EMSpectrumRange
IAU thesaurus alias: electromagnetic radiation
IAU thesaurus label: ELECTROMAGNETIC WAVES
IAU thesaurus label: RADIATION
IAU thesaurus token: ElectromagneticWaves
IAU thesaurus token: Radiation
MIS ccomment: Set of ranges in the electromagnetic spectrum
MIS cgeneric keywords: em##electromagnetic##specrum##range
MIS cnatural name: EM Spectrum Range
type: Class
disjoint with: AstrObject
disjoint with: AstroPortion
disjoint with: AtomicElement
disjoint with: ClassificationCategory
disjoint with: Measurement
disjoint with: Morphology
disjoint with: Process

EarlyTypeStar
AD ckeyword: Stars, OB
IAU thesaurus alias: blue stars
IAU thesaurus alias: hot stars
IAU thesaurus label: EARLY TYPE EMISSION STARS
IAU thesaurus label: EARLY TYPE STARS
IAU thesaurus token: EarlyTypeEmissionStars
IAU thesaurus token: EarlyTypeStars
MIS ccomment: Star of the early spectral types
MIS cgeneric keywords: early##type##star##earlytype##stars
MIS cnatural name: Early-type Star
VIZIE rkeyword: Stars:early-type
type: Class
subclass of: Star
disjoint with: FStar
disjoint with: GStar
disjoint with: LateTypeStar

Eclipse
IAU thesaurus label: ECLIPSES
IAU thesaurus token: Eclipses
MIS cgeneric keywords: eclipse##eclipsing##process##processes
MIS cnatural name: Eclipse
type: Class
subclass of: Process

EclipseAlgol
MIS cgeneric keywords: eclipse##algol##process##processes
MIS cnatural name: Eclipse of Algol Type
type: Class
subclass of: Eclipse
subclass of: Restriction
  all values from: EclipsingBinaryAlgol
  on property: isProcessOf
disjoint with: EclipseBetaLyrae
disjoint with: EclipseWUMa

EclipseBetaLyrae
MIS cnatural name: Eclipse of Beta Lyrae Type
MIS cnatural name: eclipse##beta##lyrae##process##processes##betalyrae
type: Class
subclass of: Eclipse
subclass of: Restriction
  all values from: EclipsingBinaryBetaLyrae
  on property: isProcessOf
disjoint with: EclipseAlgol
disjoint with: EclipseWUMa

EclipseWUMa
MIS cgeneric keywords: eclipse##wuma##w##ursae##majoris##process##processes
MIS cnatural name: Eclipse of WUMa Type
type: Class
subclass of: Eclipse
subclass of: Restriction
  all values from: EclipsingBinaryWUMa
  on property: isProcessOf
disjoint with: EclipseAlgol
disjoint with: EclipseBetaLyrae

EclipsingBinary
AD ckeyword: Binaries, eclipsing
GCV scode: E
IAU thesaurus alias: eclipsing stars
IAU thesaurus alias: eclipsing variable stars
IAU thesaurus alias: photometric binary stars
IAU thesaurus label: ECLIPSING BINARY STARS
IAU thesaurus token: EclipsingBinaryStars
MIS cdescription: 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.
MIS cgeneric keywords: eclipsing##binary##star##stars##binaries
MIS cnatural name: Eclipsing Binary
SIMBA dname: EB*
SIMBA dshort code: EB*
VIZIE rkeyword: Binaries:eclipsing
type: Class
subclass of: DoubleStar
subclass of: VariableStellarObject
subclass of: Restriction
  on property: hasProcess
  some values from: Eclipse
disjoint with: CataclysmicVariable

EclipsingBinaryAlgol
GCV scode: EA
IAU thesaurus alias: beta persei stars
IAU thesaurus label: ALGOL VARIABLE STARS
IAU thesaurus token: AlgolVariableStar
MIS ccomment: Eclipsing Binary of Algol type
MIS cdescription: 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.
MIS cgeneric keywords: eclipsing##binary##star##algol##beta##persei##stars##binaries
MIS cnatural name: Algol Eclipsing Binary
SIMBA dname: EB*Algol
SIMBA dshort code: Al*
type: Class
subclass of: EclipsingBinary
disjoint with: EclipsingBinaryBetaLyrae
disjoint with: EclipsingBinaryWUMa

EclipsingBinaryBetaLyrae
GCV scode: EB
IAU thesaurus label: BETA LYRAE STARS
IAU thesaurus token: BetaLyraeStars
MIS ccomment: Eclipsing Binary of Beta Lyr type
MIS cdescription: 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.
MIS cgeneric keywords: eclipsing##binary##star##beta##lyrae##stars##binaries
MIS cnatural name: Beta Lyrae Eclipsing Binary
SIMBA dname: EB*betLyr
SIMBA dshort code: bL*
type: Class
subclass of: EclipsingBinary
disjoint with: EclipsingBinaryAlgol
disjoint with: EclipsingBinaryWUMa

EclipsingBinaryWUMa
GCV scode: EW
MIS ccomment: Eclipsing Binary of W UMa type
MIS cdescription: 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.
MIS cgeneric keywords: eclipsing##binary##star##wuma##w##ursae##majoris##stars##binaries
MIS cnatural name: WUMa Eclipsing Binary
SIMBA dname: EB*WUMa
SIMBA dshort code: WU*
type: Class
subclass of: EclipsingBinary
disjoint with: EclipsingBinaryAlgol
disjoint with: EclipsingBinaryBetaLyrae

EffectiveTemperature
AD ckeyword: Effective temperatures
IAU thesaurus label: EFFECTIVE TEMPERATURE
IAU thesaurus token: EffectiveTemperature
MIS cgeneric keywords: effective##temperature
MIS cnatural name: Effective Temperature
type: Class
subclass of: Temperature
subclass of: Class
  complement of: Restriction
    on property: isMeasuredFor
    some values from: NeutronStar
subclass of: Class
  complement of: Restriction
    on property: isMeasuredFor
    some values from: StellarBlackHole
subclass of: Restriction
  all values from: StellarObject
  on property: isMeasuredFor
disjoint with: ElectronTemperature

ElectronTemperature
MIS cgeneric keywords: electron##temperature
MIS cnatural name: Electron Temperature
type: Class
subclass of: Temperature
subclass of: Restriction
  all values from: EmissionNebula
  on property: isMeasuredFor

EllipsoidalVariableStar
GCV scode: ELL
IAU thesaurus label: ELLIPSOIDAL VARIABLE STARS
IAU thesaurus token: EllipsoidalVariableStar
MIS cdescription: 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.
MIS cgeneric keywords: ellipsoidal##variable##star##variables##stars
MIS cnatural name: Ellipsoidal Variable Star
SIMBA dname: RotV*Ell
SIMBA dshort code: El*
type: Class
subclass of: DoubleStar
subclass of: RotationallyVariableStellarObject
disjoint with: TTauri

EllipticalGalaxy
IAU thesaurus alias: E galaxies
IAU thesaurus label: EARLY TYPE GALAXIES
IAU thesaurus label: ELLIPTICAL GALAXIES
IAU thesaurus label: Ep GALAXIES
IAU thesaurus label: cD GALAXIES
IAU thesaurus token: EarlyTypeGalaxies
IAU thesaurus token: EllipticalGalaxies
IAU thesaurus token: EpGalaxies
IAU thesaurus token: cDGalaxies
MIS cgeneric keywords: elliptical##galaxy##gal##galaxies##g
MIS cnatural name: Elliptical Galaxy
type: Class
subclass of: Galaxy

Emission
IAU thesaurus label: EMISSION PROCESSES
IAU thesaurus token: EmissionProcesses
MIS cgeneric keywords: emission##process##processes
MIS cnatural name: Emission Process
type: Class
subclass of: Process

EmissionLineGalaxy
IAU thesaurus label: EMISSION LINE GALAXIES
IAU thesaurus token: EmissionLineGalaxies
MIS cgeneric keywords: emission##line##galaxy##gal##galaxies##g
MIS cnatural name: Emission-line Galaxy
SIMBA dname: EmG
SIMBA dshort code: EmG
type: Class
subclass of: Galaxy

EmissionLineStar
IAU thesaurus alias: herbig stars
IAU thesaurus label: Ae STARS
IAU thesaurus token: AeStars
MIS cgeneric keywords: emission##line##emissionline##star
MIS cnatural name: Emission-line Star
SIMBA dname: Em*
SIMBA dshort code: Em*
VIZIE rkeyword: Stars:Emission
type: Class
subclass of: PeculiarStar
subclass of: Restriction
  on property: hasEmissionSpectralLineFor
  some values from: AtomicElement

EmissionNebula
IAU thesaurus label: EMISSION NEBULAE
IAU thesaurus label: EmissionNebulae
MIS cgeneric keywords: emission##nebula##nebulae##neb
MIS cnatural name: Emission Nebula
type: Class
subclass of: Nebula
subclass of: Restriction
  on property: hasEmissionSpectralLineFor
  some values from: AtomicElement
disjoint with: ReflectionNebula

Envelope
IAU thesaurus label: ENVELOPES
IAU thesaurus token: Envelopes
MIS cgeneric keywords: envelope
MIS cnatural name: Envelope
type: Class
subclass of: PortionOfStellarObject

EquivalentWidth
IAU thesaurus label: EQUIVALENT WIDTHS
IAU thesaurus token: EquivalentWidths
MIS cgeneric keywords: equivalent##width
MIS cnatural name: Equivalent Width
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

EruptiveVariableStellarObject
IAU thesaurus alias: eruptive stars
IAU thesaurus alias: eruptive variable stars
IAU thesaurus alias: explosive variable stars
IAU thesaurus label: ERUPTIVE BINARY STARS
IAU thesaurus token: EruptiveBinaryStars
MIS cdescription: 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.
MIS cgeneric keywords: eruptive##variable##star##stars##variables
MIS cnatural name: Eruptive Variable Star
SIMBA dname: Eruptive*
SIMBA dshort code: Er*
type: Class
subclass of: VariableStellarObject
subclass of: Restriction
  on property: hasProcess
  some values from: Explosion

Explosion
IAU thesaurus label: ERUPTIONS
IAU thesaurus label: EXPLOSIONS
IAU thesaurus token: Eruptions
IAU thesaurus token: Explosions
MIS ccomment: Explosion or Eruption process
MIS cgeneric keywords: eruption##explosion##process##processes
MIS cnatural name: Explosion or Eruption process
type: Class
subclass of: Process

Extended
IAU thesaurus label: EXTENDED OBJECTS
IAU thesaurus label: EXTENDED SOURCES
IAU thesaurus token: ExtendedObjects
IAU thesaurus token: ExtendedSources
MIS cgeneric keywords: extended##morphology
MIS cnatural name: Extended
type: Class
subclass of: Morphology
subclass of: Restriction
  all values from: Class
    union of: InterStellarMedium
    union of: Class
      intersection of: CompoundObject
      intersection of: Class
        complement of: MultipleStar
  on property: isMorphologyOf
subclass of: Class
  complement of: Compact
disjoint with: Compact

Extended i
MIS ccomment: default instance
type: Extended

ExtremeUltraViolet
IAU thesaurus label: EXTREME ULTRAVIOLET RADIATION
IAU thesaurus token: ExtremeUltravioletRadiation
VIZIE rkeyword: EUV
type: Class
subclass of: UltraViolet
disjoint with: GammaRays
disjoint with: Infrared
disjoint with: Optical
disjoint with: Radio
disjoint with: XRays

ExtremeUltraVioletSource
AD ckeyword: EUV sources
AD ckeyword: Extreme UV sources
MIS cregistry alternate single subject: euv
MIS cregistry alternate single subject: extreme ultraviolet
VIZIE rkeyword: EUV
type: Class
subclass of: UltraVioletSource

ExtremelyRedObject
MIS cgeneric keywords: extremely##red##object
MIS cnatural name: Extremely Red Object
SIMBA dname: RedExtreme
SIMBA dshort code: ERO
type: Class
subclass of: RedObject

FDwarfStar
IAU thesaurus label: F DWARF STARS
IAU thesaurus token: FDwarfStars
type: Class
subclass of: DwarfStar
subclass of: FStar
disjoint with: ADwarfStar
disjoint with: BDwarfStar
disjoint with: FSubDwarfStar
disjoint with: FSubGiantStar
disjoint with: FSuperGiantStar
disjoint with: GDwarfStar

FStar
AD ckeyword: Stars, F-type
IAU thesaurus label: F STARS
IAU thesaurus token: FStars
MIS ccomment: Star of Spectral Type F
MIS cgeneric keywords: f##fstar##star##stars##fstars
MIS cnatural name: F Star
type: Class
subclass of: Star
disjoint with: EarlyTypeStar
disjoint with: LateTypeStar

FSubDwarfStar
IAU thesaurus label: F SUBDWARF STARS
IAU thesaurus token: FSubDwarfStars
type: Class
subclass of: FStar
subclass of: SubDwarfStar
disjoint with: ASubDwarfStar
disjoint with: BSubDwarfStar
disjoint with: FDwarfStar
disjoint with: FSubGiantStar
disjoint with: FSuperGiantStar
disjoint with: GSubDwarfStar

FSubGiantStar
IAU thesaurus token: FSubgiantStars
type: Class
subclass of: FStar
subclass of: SubGiantStar
disjoint with: ASubGiantStar
disjoint with: FDwarfStar
disjoint with: FSubDwarfStar
disjoint with: FSuperGiantStar
disjoint with: GSubGiantStar

FSuperGiantStar
IAU thesaurus label: F SUPERGIANT STARS
IAU thesaurus token: FSupergiantStars
type: Class
subclass of: FStar
subclass of: SuperGiantStar
disjoint with: ASuperGiantStar
disjoint with: BSuperGiant
disjoint with: FDwarfStar
disjoint with: FSubDwarfStar
disjoint with: FSubGiantStar
disjoint with: GSuperGiantStar

FUOrionis
GCV scode: FU
IAU thesaurus label: FU ORIONIS STARS
IAU thesaurus token: FuOrionisStars
MIS ccomment: Variable Star of FU Ori type
MIS cdescription: 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.
MIS cgeneric keywords: fu##orionis##orion##variable##star##stars##variables
MIS cnatural name: FU Orionis Variable Star
SIMBA dname: FUOr*
SIMBA dshort code: FU*
type: Class
subclass of: OrionVariableStar
disjoint with: TTauri

FanaroffRileyTypeI
IAU thesaurus label: FANAROFF RILEY CLASS
IAU thesaurus token: FanaroffRileyClass
MIS ccomment: Fanaroff-Riley Type I, which is a Type2 Active Galactic Nucleus
MIS cgeneric keywords: fanaroff##riley##type##1##type1##agn##active##galatic##nucleus##nuclei##galaxy
MIS cnatural name: Fanaroff-Riley Type-1 Object
type: Class
subclass of: LowPowerRadioLoudAGN
disjoint with: BLLacertae

FanaroffRileyTypeII
IAU thesaurus label: FANAROFF RILEY CLASS
IAU thesaurus token: FanaroffRileyClass
MIS ccomment: Fanaroff-Riley type II, which is a Type2 Active Galactic Nucleus
MIS cgeneric keywords: fanaroff##riley##type##2##agn#active##nucleus##galactic##type2##nuclei##galaxy
MIS cnatural name: Fanaroff-Riley type 2
type: Class
subclass of: HighPowerRadioLoudAGN
disjoint with: FlatSpectrumRadioQuasar
disjoint with: SteepSpectrumRadioQuasar

FarInfrared
IAU thesaurus label: FAR INFRARED RADIATION
IAU thesaurus token: FarInfraredRadiation
MIS ccomment: Wavelength above 30 microns
MIS cgeneric keywords: far##infrared
MIS cnatural name: Far Infrared
type: Class
subclass of: Infrared
disjoint with: NearInfrared

FarInfraredSource
MIS cgeneric keywords: far##ir##infrared##source
MIS cnatural name: Far-IR Source
SIMBA dname: IR>30µ
SIMBA dshort code: FIR
type: Class
subclass of: InfraredSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: FarInfrared

FlareStar
AD ckeyword: Stars, flare
IAU thesaurus label: FLARE STARS
IAU thesaurus token: FlareStars
MIS ccomment: Flare Star
MIS cdescription: 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.
MIS cgeneric keywords: flare##star##flarestar##stars
MIS cnatural name: Flare Star
MIS cregistry alternate single subject: flare
NE dcode: Flare*
SIMBA dname: Flare*
SIMBA dshort code: Fl*
type: Class
subclass of: DwarfStar
subclass of: EruptiveVariableStellarObject
subclass of: LateTypeStar
disjoint with: GammaDoradus
disjoint with: RCoronaeBorealis

FlatSpectrumRadioQuasar
MIS ccomment: Flat-Spectrum Radio Quasar, which is a Type1 active galactic nucleus
MIS cgeneric keywords: type##1##type1##flat##spectrum##radio##quasar##qso
MIS cnatural name: Flat-Spectrum Radio Quasar
type: Class
subclass of: HighPowerRadioLoudAGN
disjoint with: FanaroffRileyTypeII
disjoint with: SteepSpectrumRadioQuasar

Flux
IAU thesaurus label: FLUX
IAU thesaurus token: Flux
MIS cgeneric keywords: flux
MIS cnatural name: Flux
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

FluxAmplitudeVariation
MIS cgeneric keywords: flux##amplitude##variation
MIS cnatural name: Flux Amplitude Variation
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

FluxRatio
MIS cgeneric keywords: flux##ratio
MIS cnatural name: Flux Ratio
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

FluxRatio Radio5Ghz Optical
MIS cgeneric keywords: flux##ratio##radio5ghz##radio##5Ghx##optical
MIS cnatural name: Flux Ration Radio5Ghz-Optical
type: Class
subclass of: FluxRatio

GCVScode
MIS cdescription: General Catalogue of Variable Stars code corresponding to a concept of the ontology
type: AnnotationProperty
type: DatatypeProperty
range: string

GDwarfStar
IAU thesaurus label: G DWARF STARS
IAU thesaurus token: GDwarfStars
MIS cgeneric keywords: G##gtype##g-type##type##star##stars##dwarf##dwarves
MIS cnatural name: G Dwarf Star
type: Class
subclass of: DwarfStar
subclass of: GStar
disjoint with: ADwarfStar
disjoint with: BDwarfStar
disjoint with: FDwarfStar
disjoint with: GGiantStars
disjoint with: GSubDwarfStar
disjoint with: GSubGiantStar
disjoint with: GSuperGiantStar

GGiantStars
IAU thesaurus label: G GIANT STARS
IAU thesaurus token: GGiantStars
MIS cgeneric keywords: g##gtype##giant##giants##star##stars
MIS cnatural name: G Giant Star
type: Class
subclass of: GStar
subclass of: GiantStar
disjoint with: AGiantStar
disjoint with: BGiantStar
disjoint with: GDwarfStar
disjoint with: GSubDwarfStar
disjoint with: GSubGiantStar
disjoint with: GSuperGiantStar

GStar
AD ckeyword: Stars, G-type
IAU thesaurus label: G STARS
IAU thesaurus token: GStars
MIS ccomment: Star of Spectral Type G
MIS cgeneric keywords: g##gstar##star##gstars##stars
MIS cnatural name: G Star
type: Class
subclass of: Star
disjoint with: EarlyTypeStar
disjoint with: LateTypeStar

GSubDwarfStar
IAU thesaurus label: G SUBDWARF STARS
IAU thesaurus token: GSubdwarfStars
type: Class
subclass of: GStar
subclass of: SubDwarfStar
disjoint with: ASubDwarfStar
disjoint with: BSubDwarfStar
disjoint with: FSubDwarfStar
disjoint with: GDwarfStar
disjoint with: GGiantStars
disjoint with: GSubGiantStar
disjoint with: GSuperGiantStar

GSubGiantStar
IAU thesaurus label: G SUBGIANT STARS
IAU thesaurus token: GSubgiantStars
MIS cnatural name: G Subgiant Star
type: Class
subclass of: GStar
subclass of: SubGiantStar
disjoint with: ASubGiantStar
disjoint with: FSubGiantStar
disjoint with: GDwarfStar
disjoint with: GGiantStars
disjoint with: GSubDwarfStar
disjoint with: GSuperGiantStar

GSuperGiantStar
IAU thesaurus label: G SUPERGIANT STARS
IAU thesaurus token: GSupergiantStars
MIS cgeneric keywords: g##gtype##super##giant##supergiant##supergiants##star##stars
MIS cnatural name: G Supergiant Star
type: Class
subclass of: GStar
subclass of: SuperGiantStar
disjoint with: ASuperGiantStar
disjoint with: BSuperGiant
disjoint with: FSuperGiantStar
disjoint with: GDwarfStar
disjoint with: GGiantStars
disjoint with: GSubDwarfStar
disjoint with: GSubGiantStar

GalaxiesCompactGroup
MIS cgeneric keywords: compact##galaxy##galaxies##group##groups
MIS cnatural name: Compact Group of Galaxies
SIMBA dname: Compact_Gr_G
SIMBA dshort code: CGG
type: Class
subclass of: GalaxiesGroup
subclass of: Restriction
  on property: hasMorphology
  some values from: Compact

GalaxiesGroup
IAU thesaurus label: GROUPS OF GALAXIES
IAU thesaurus token: GroupsOfGalaxies
MIS cgeneric keywords: group##galaxies##galaxy##groups
MIS cnatural name: Group of Galaxies
NE dcode: GGroup
SIMBA dname: GroupG
SIMBA dshort code: GrG
type: Class
subclass of: CompoundObject
subclass of: Restriction
  all values from: Class
    union of: Galaxy
    union of: GalaxyPair
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: LINER
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject
disjoint with: SuperClusterOfGalaxies

Galaxy
AD ckeyword: Galaxies, IR
AD ckeyword: Galaxies, Markarian
AD ckeyword: Galaxies, UV-excess
AD ckeyword: Galaxies, nearby
AD ckeyword: Galaxies, optical
AD ckeyword: Galaxies, photometry
AD ckeyword: Galaxies, rotation
AD ckeyword: Galaxies, spectra
AD ckeyword: Galaxy catalogs
IAU thesaurus label: COMPACT GALAXIES
IAU thesaurus label: GALAXIES
IAU thesaurus label: GALAXY
IAU thesaurus token: BrightGalaxies
IAU thesaurus token: CompactGalaxies
IAU thesaurus token: Galaxies
IAU thesaurus token: Galaxy
MIS cgeneric keywords: galaxy##gal##galaxies##g
MIS cnatural name: Galaxy
MIS cregistry alternate single subject: Galaxies
MIS cregistry alternate single subject: Galaxy
MIS cregistry alternate single subject: galaxies
NE dcode: G
SIMBA dname: Galaxies, optical
SIMBA dshort code: G
VIZIE rkeyword: Galaxies
type: Class
subclass of: CompoundObject
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: GalaxyPair
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject
disjoint with: SuperClusterOfGalaxies

GalaxyInCluster
MIS ccomment: Galaxy in a Cluster of Galaxies
MIS cgeneric keywords: cluster##in##galaxy##gal##galaxies##g
MIS cnatural name: Galaxy in Cluster
SIMBA dname: GinCl
SIMBA dshort code: GiC
type: Class
subclass of: Galaxy
subclass of: Restriction
  on property: isComponentOf
  some values from: ClusterOfGalaxies

GalaxyInGroup
MIS ccomment: Galaxy in a Group of Galaxies
MIS cgeneric keywords: group##galaxy##gal##galaxies##in##g
MIS cnatural name: Galaxy in Group
SIMBA dname: GinGroup
SIMBA dshort code: GiG
type: Class
subclass of: Galaxy
subclass of: Restriction
  on property: isComponentOf
  some values from: GalaxiesGroup

GalaxyInPair
MIS cgeneric keywords: in##pair##galaxy##gal##galaxies##g
MIS cnatural name: Galaxy in Pair
SIMBA dname: GinPair
SIMBA dshort code: GiP
type: Class
subclass of: Galaxy
subclass of: Restriction
  on property: isComponentOf
  some values from: GalaxyPair

GalaxyMorphology
MIS cgeneric keywords: galactic##galaxy##morphology
MIS cnatural name: Galaxy Morphology
type: Class
subclass of: Morphology
subclass of: Restriction
  all values from: GiantGalaxy
  on property: isMorphologyOf

GalaxyMorphologyBarredSpiral
MIS cgeneric keywords: galactic##galaxy##morphology##barred##spiral
SIMBA dmorphological type: SB##SBa##SBb##SBc##SBd##SBab##SBbc##SBcd##SB0##SB0a
type: Class
subclass of: GalaxyMorphology
subclass of: Restriction
  all values from: BarredSpiralGalaxy
  on property: isMorphologyOf

GalaxyMorphologyBarredSpiral i
MIS ccomment: default instance
type: GalaxyMorphologyBarredSpiral

GalaxyMorphologyDwarf
MIS cgeneric keywords: galactic##galaxy##morphology##dwarf
type: Class
subclass of: GalaxyMorphology

GalaxyMorphologyDwarfBarredSpiral
MIS cgeneric keywords: galactic##galaxy##morphology##dwarf##barred##spiral
type: Class
subclass of: GalaxyMorphologyBarredSpiral
subclass of: GalaxyMorphologyDwarf
subclass of: Restriction
  all values from: DwarfBarredSpiralGalaxy
  on property: isMorphologyOf

GalaxyMorphologyDwarfElliptical
MIS cgeneric keywords: galactic##galaxy##morphology##dwarf##elliptical
SIMBA dmorphological type: dE
type: Class
subclass of: GalaxyMorphologyDwarf
subclass of: GalaxyMorphologyElliptical
subclass of: Restriction
  all values from: DwarfEllipticalGalaxy
  on property: isMorphologyOf
disjoint with: GalaxyMorphologyGiantElliptical

GalaxyMorphologyDwarfIrregular
MIS cgeneric keywords: galactic##galaxy##morphology##dwarf##irregular
SIMBA dmorphological type: dI
type: Class
subclass of: GalaxyMorphologyDwarf
subclass of: GalaxyMorphologyIrregular
subclass of: Restriction
  all values from: DwarfIrregularGalaxy
  on property: isMorphologyOf

GalaxyMorphologyDwarfSpiral
MIS cgeneric keywords: galactic##galaxy##morphology##dwarf##spiral
type: Class
subclass of: GalaxyMorphologyDwarf
subclass of: GalaxyMorphologySpiral
subclass of: Restriction
  all values from: DwarfSpiralGalaxy
  on property: isMorphologyOf
disjoint with: GalaxyMorphologyRing

GalaxyMorphologyElliptical
MIS cgeneric keywords: galactic##galaxy##morphology##elliptical
SIMBA dmorphological type: E
type: Class
subclass of: GalaxyMorphology
subclass of: Restriction
  all values from: EllipticalGalaxy
  on property: isMorphologyOf

GalaxyMorphologyGiant
MIS cgeneric keywords: galactic##galaxy##morphology##giant
type: Class
subclass of: GalaxyMorphology

GalaxyMorphologyGiantElliptical
MIS cgeneric keywords: galactic##galaxy##morphology##giant##elliptical
type: Class
subclass of: GalaxyMorphologyElliptical
subclass of: GalaxyMorphologyGiant
subclass of: Restriction
  all values from: GiantEllipticalGalaxy
  on property: isMorphologyOf

GalaxyMorphologyIrregular
MIS cgeneric keywords: galactic##galaxy##morphology##irregular
SIMBA dmorphological type: I
type: Class
subclass of: GalaxyMorphology
subclass of: Restriction
  all values from: IrregularGalaxy
  on property: isMorphologyOf

GalaxyMorphologyLenticular
MIS cgeneric keywords: galactic##galaxy##morphology##lenticular
SIMBA dmorphological type: S0##S0a
type: Class
subclass of: GalaxyMorphology
subclass of: Restriction
  all values from: LenticularGalaxy
  on property: isMorphologyOf

GalaxyMorphologyPeculiar
MIS cgeneric keywords: galactic##galaxy##morphology##peculiar
type: Class
subclass of: GalaxyMorphology
subclass of: Restriction
  all values from: PeculiarGalaxy
  on property: isMorphologyOf

GalaxyMorphologyPolarRing
MIS cgeneric keywords: galactic##galaxy##morphology##ring##polar
type: Class
subclass of: GalaxyMorphologyRing
subclass of: Restriction
  all values from: PolarRingGalaxy
  on property: isMorphologyOf

GalaxyMorphologyRing
MIS cgeneric keywords: galactic##galaxy##morphology##ring
type: Class
subclass of: GalaxyMorphologyLenticular
subclass of: GalaxyMorphologySpiral
subclass of: Restriction
  all values from: RingGalaxy
  on property: isMorphologyOf

GalaxyMorphologySpiral
MIS cgeneric keywords: galactic##galaxy##morphology##spiral
SIMBA dmorphological type: S##Sa##Sb##Sc##Sd##Sab##Sbc##Scd##
type: Class
subclass of: GalaxyMorphology
subclass of: Restriction
  all values from: SpiralGalaxy
  on property: isMorphologyOf

GalaxyMorphology i
MIS ccomment: default instance
type: GalaxyMorphology

GalaxyPair
IAU thesaurus label: DOUBLE GALAXIES
IAU thesaurus token: DoubleGalaxies
MIS cgeneric keywords: pair##gal##galaxy##galaxies##pairs##g##gal##double
MIS cnatural name: Galaxy Pair
NE dcode: GPair
SIMBA dname: PairG
SIMBA dshort code: PaG
type: Class
subclass of: CompoundObject
subclass of: Restriction
  max cardinality: 2
  on property: hasComponent
subclass of: Restriction
  all values from: Galaxy
  on property: hasComponent
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject
disjoint with: SuperClusterOfGalaxies

GammaDoradus
MIS ccomment: Variable Star of gamma Dor type
MIS cdescription: 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.
MIS cgeneric keywords: gamma##doradus##variable##variables##stars##star
MIS cnatural name: Gamma Doradus Variable
SIMBA dname: gammaDor
SIMBA dshort code: gD*
type: Class
subclass of: DwarfStar
subclass of: PulsatingStellarObject
disjoint with: Alpha2CanumVenaticorum
disjoint with: BYDraconis
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: FlareStar
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: WVirginisStar

GammaRaySource
IAU thesaurus label: GAMMA RAY SOURCES
IAU thesaurus token: GammaRaySources
MIS cgeneric keywords: gamma##ray##source
MIS cnatural name: Gamma-ray Source
NE dcode: GammaS
SIMBA dname: gamma
SIMBA dshort code: gam
type: Class
subclass of: EMSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: GammaRays

GammaRays
AD ckeyword: Gamma rays
IAU thesaurus alias: gamma radiation
IAU thesaurus label: GAMMA RAYS
IAU thesaurus token: GammaRays
MIS cgeneric keywords: gamma##rays##ray
MIS cnatural name: Gamma Rays
VIZIE rkeyword: Gamma-ray
type: Class
subclass of: EMSpectrumRange
disjoint with: Infrared
disjoint with: Optical
disjoint with: Radio
disjoint with: UltraViolet
disjoint with: XRays

GiantEllipticalGalaxy
IAU thesaurus label: GIANT ELLIPTICAL GALAXIES
IAU thesaurus token: GiantEllipticalGalaxies
MIS cgeneric keywords: giant##elliptical##galaxy##gal##galaxies##g
MIS cnatural name: Giant Elliptical Galaxy
type: Class
subclass of: EllipticalGalaxy
subclass of: GiantGalaxy

GiantGalaxy
IAU thesaurus label: GIANT GALAXIES
IAU thesaurus token: GiantGalaxies
type: Class
subclass of: Galaxy

GiantStar
AD ckeyword: Stars, giant
IAU thesaurus alias: cs stars
IAU thesaurus label: GIANT BRANCH STARS
IAU thesaurus label: GIANT STARS
IAU thesaurus token: GiantBranchStars
IAU thesaurus token: GiantStars
MIS ccomment: Star of Luminosity Class III
MIS cgeneric keywords: giant##giants
MIS cnatural name: Giant
type: Class
subclass of: Star

GlobularCluster
AD ckeyword: Clusters, globular
IAU thesaurus label: GLOBULAR STAR CLUSTERS
IAU thesaurus token: GlobularStarClusters
MIS cgeneric keywords: globular##cluster##star##stars##clusters
MIS cnatural name: Globular Cluster
MIS cregistry alternate single subject: Globular Clusters
SIMBA dname: GlCl
SIMBA dshort code: GlC
VIZIE rkeyword: Globular_Clusters
type: Class
subclass of: ClusterOfStars
disjoint with: OpenCluster

HIIGalaxy
MIS cgeneric keywords: hii####galaxy##gal##galaxies##g
MIS cnatural name: HII Galaxy
SIMBA dname: HII_G
SIMBA dshort code: H2G
type: Class
subclass of: Galaxy

HIIRegion
AD ckeyword: H II regions
IAU thesaurus label: COMPACT H II REGIONS
IAU thesaurus label: H II REGIONS
IAU thesaurus token: CompactHIiRegions
IAU thesaurus token: HIiRegions
MIS ccomment: HII (inonized) region
MIS cgeneric keywords: hii##region##regions
MIS cnatural name: HII Region
NE dcode: HII
SIMBA dname: HII
SIMBA dshort code: HII
VIZIE rkeyword: HII_regions
type: Class
subclass of: EmissionNebula
subclass of: RadioSource
subclass of: Restriction
  all values from: EarlyTypeStar
  on property: isIonizedBy
disjoint with: HIRegion
disjoint with: MolecularCloud
disjoint with: PlanetaryNebulaShell
disjoint with: Pulsar
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

HIRegion
AD ckeyword: H I data
IAU thesaurus label: H I REGIONS
IAU thesaurus label: HICLOUDS
IAU thesaurus token: HIClouds
IAU thesaurus token: HIRegions
MIS ccomment: HI (neutral) region
MIS cgeneric keywords: hi##region##regions
MIS cnatural name: HI Region
SIMBA dname: HI
SIMBA dshort code: HI
type: Class
subclass of: Cloud
subclass of: RadioSource
disjoint with: HIIRegion
disjoint with: MolecularCloud
disjoint with: Pulsar
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

HIRegionCold
MIS cgeneric keywords: hi##region##cold##regions
MIS cnatural name: Cold HI Region
SIMBA dname: HI
SIMBA dshort code: HI
type: Class
subclass of: HIRegion
disjoint with: HIRegionWarm

HIRegionWarm
MIS cgeneric keywords: warm##hi##region##regions
MIS cnatural name: HI Region Warm
SIMBA dname: HI
SIMBA dshort code: HI
type: Class
subclass of: HIRegion
disjoint with: HIRegionCold

HLineEmission
IAU thesaurus alias: twenty one cm line
IAU thesaurus label: 21 CM LINE
IAU thesaurus token: 21CmLine
MIS cgeneric keywords: h##hydrogen##line##emission##process##processes
type: Class
subclass of: LineEmission

Halo
IAU thesaurus label: HALOS
IAU thesaurus token: Halos
MIS cgeneric keywords: halo
MIS cnatural name: Halo
type: Class
subclass of: PortionOfGalaxy
disjoint with: OldDisk
disjoint with: SpiralArm

HerbigHaro
IAU thesaurus alias: herbig stars
IAU thesaurus alias: hh objects
IAU thesaurus label: Ae STARS
IAU thesaurus label: HERBIG HARO OBJECTS
IAU thesaurus token: AeStars
IAU thesaurus token: HerbigHaroObjects
MIS cdescription: 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”.
MIS cgeneric keywords: herbig##haro##herbigharo##object##ae##be##star##stars
MIS cnatural name: Herbig star
SIMBA dname: HH
SIMBA dshort code: HH
type: Class
subclass of: EarlyTypeStar
subclass of: TTauri
subclass of: Class
  union of: AStar
  union of: BStar
disjoint with: BetaCephei
disjoint with: ClassicalTTauri
disjoint with: WeakLineTTauri

HighMassStar
MIS cgeneric keywords: high##mass##star##highmass##stars
MIS cnatural name: High-mass Star
type: Class
subclass of: Star

HighMassXrayBinary
MIS cdescription: 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.
MIS cgeneric keywords: x##ray##xray##binary##binaries##high##mass##hmxb#hmxrb
MIS cnatural name: High-mass X-ray Binary
SIMBA dname: HMXB
SIMBA dshort code: HXB
type: Class
subclass of: GammaRaySource
subclass of: XRayBinary
subclass of: Restriction
  all values from: Class
    union of: BlueSuperGiant
    union of: NeutronStar
    union of: StellarBlackHole
  on property: hasComponent
disjoint with: LowMassXRayBinary
disjoint with: Magnetar

HighPowerRadioLoudAGN
MIS cgeneric keywords: high##power##radio##loud##agn##active##galactic##nucleus##nuclei##highpower##radioloud##galaxy
MIS cnatural name: High-power Radio-loud AGN
type: Class
subclass of: RadioLoudAGN

HighPowerRadioQuietAGN QSO
AD ckeyword: QSOs
IAU thesaurus alias: qso
IAU thesaurus alias: quasi stellar galaxies
IAU thesaurus alias: quasi stellar objects
IAU thesaurus alias: quasi stellar radio sources
IAU thesaurus label: DOUBLE QUASARS
IAU thesaurus label: QUASARS
IAU thesaurus label: RADIO QUIET QUASARS
IAU thesaurus token: DoubleQuasars
IAU thesaurus token: Quasars
IAU thesaurus token: RadioQuietQuasars
MIS cgeneric keywords: high##power##radio##quiet##agn##active##galaxy##nucleus##nuclei##quasar##quasi##stellar##quasistellar##object##objects##qso##qsos
MIS cnatural name: High-power Radio-quiet AGN
MIS cregistry alternate single subject: QSO
MIS cregistry alternate single subject: QSOs
MIS cregistry alternate single subject: Quasars: general
NE dcode: QSO
SIMBA dname: QSO
SIMBA dshort code: QSO
VIZIE rkeyword: QSOs
type: Class
subclass of: RadioQuietAGN
subclass of: Restriction
  on property: isComponentOf
  some values from: Class
    union of: EllipticalGalaxy
    union of: SpiralGalaxy
subclass of: Restriction
  on property: hasPortion
  some values from: Jet
disjoint with: LowPowerRadioQuietAGN Seyfert

HighProperMotionStar
MIS cgeneric keywords: high##proper##motion##star
MIS cnatural name: High-proper motion Star
SIMBA dname: PM*
SIMBA dshort code: PM*
type: Class
subclass of: HighVelocityStar
subclass of: Restriction
  on property: hasMeasurement
  some values from: ProperMotion

HighRedshiftGalaxy
MIS cgeneric keywords: high##redshift##galaxy##gal##galaxies##g
MIS cnatural name: Galaxy with High Redshift
SIMBA dname: High_z_G
SIMBA dshort code: HzG
type: Class
subclass of: Galaxy

HighVelocityCloud
IAU thesaurus label: HIGH VELOCITY CLOUDS
IAU thesaurus token: HighVelocityClouds
MIS ccomment: HVC (High Velocity Cloud)
MIS cgeneric keywords: high##velocity##cloud##coulds##hvc##hvcld
MIS cnatural name: High-velocity Cloud
SIMBA dname: HVCld
SIMBA dshort code: HVC
type: Class
subclass of: Cloud
subclass of: Restriction
  on property: hasMeasurement
  some values from: Velocity

HighVelocityStar
AD ckeyword: Stars, high-velocity
IAU thesaurus label: HIGH VELOCITY STARS
IAU thesaurus token: HighVelocityStars
MIS cgeneric keywords: highvelocity##high##velocity##star
MIS cnatural name: High-velocity Star
SIMBA dname: HV*
SIMBA dshort code: HV*
type: Class
subclass of: PeculiarStar
subclass of: Restriction
  on property: hasMeasurement
  some values from: Velocity

HorizontalBranchStar
AD ckeyword: Stars, horizontal branch
IAU thesaurus label: HORIZONTAL BRANCH STARS
IAU thesaurus token: HorizontalBranchStars
MIS cgeneric keywords: hb##star##horizontal##branch
MIS cnatural name: Horizontal-branch Star
SIMBA dname: HB*
SIMBA dshort code: HB*
type: Class
subclass of: PeculiarStar

Infrared
AD ckeyword: Spectra, infrared
IAU thesaurus label: INFRARED
IAU thesaurus token: Infrared
MIS cgeneric keywords: ir##infrared
MIS cnatural name: Infrared
VIZIE rkeyword: IR
type: Class
subclass of: EMSpectrumRange
disjoint with: GammaRays
disjoint with: Optical
disjoint with: Radio
disjoint with: UltraViolet
disjoint with: XRays

InfraredSource
AD ckeyword: Infrared sources
IAU thesaurus label: INFRARED SOURCES
IAU thesaurus token: InfraredSources
MIS cgeneric keywords: ir##infrared##source
MIS cnatural name: Infrared Source
MIS cregistry alternate single subject: Infrared
MIS cregistry alternate single subject: Infrared:stars
NE dcode: IrS
SIMBA dname: IR
SIMBA dshort code: IR
type: Class
subclass of: EMSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: Infrared

InterStellarMedium
AD ckeyword: Interstellar medium
MIS cgeneric keywords: inter##stellar##interstellar##medium##ism
MIS cnatural name: ISM
MIS cregistry alternate single subject: Interstellar medium
MIS cregistry alternate single subject: interstellar medium
SIMBA dname: Cloud
SIMBA dname: Neb
SIMBA dshort code: Cld
SIMBA dshort code: Neb
VIZIE rkeyword: Interstellar_Medium
type: Class
subclass of: AstrObject
disjoint with: StellarObject
disjoint with: SubStellarObject
disjoint with: SupermassiveBlackHole
disjoint with: Unknown
disjoint with: VariableStellarObject

InteractingGalaxy
IAU thesaurus label: INTERACTING GALAXIES
IAU thesaurus token: InteractingGalaxies
MIS cdescription: galaxy in strong interaction with others (within a pair or a group)
MIS cgeneric keywords: interacting##galaxy##galaxies
MIS cnatural name: Interacting Galaxy
SIMBA dname: IG
SIMBA dshort code: IG
type: Class
subclass of: Galaxy

IrregularGalaxy
IAU thesaurus label: IRREGULAR GALAXIES
IAU thesaurus token: IrregularGalaxies
MIS cgeneric keywords: irregular##galaxy##gal##galaxies##g
MIS cnatural name: Irregular Galaxy
type: Class
subclass of: Galaxy

IrregularVariableStellarObject
IAU thesaurus label: IRREGULAR VARIABLE STARS
IAU thesaurus token: IrregularVariableStars
MIS ccomment: Variable Star of Irregular type
MIS cdescription: Stars showing variations of irregular (non-periodic) type. Mostly (?) of eruptive type.
MIS cgeneric keywords: irregular##variable##star##variables##stars
MIS cnatural name: Irregular Variable Star
SIMBA dname: Irregular_V*
SIMBA dshort code: Ir*
type: Class
subclass of: VariableStellarObject
subclass of: Restriction
  on property: hasProcess
  some values from: NonPeriodicProcess

Jet
IAU thesaurus alias: astrophysical jets
IAU thesaurus label: JETS
IAU thesaurus token: Jets
MIS cgeneric keywords: jet##jets
MIS cnatural name: Jet
type: Class
subclass of: AstroPortion
subclass of: Restriction
  all values from: Class
    union of: RadioGalaxy
    union of: RadioQuietAGN
  on property: isPortionOf

KStar
AD ckeyword: Stars, K-type
MIS ccomment: Star of Spectral Type K
MIS cgeneric keywords: kstar##k##star#stars##kstars
MIS cnatural name: K Star
type: Class
subclass of: LateTypeStar

LINER
MIS ccomment: LINER-type Active Galaxy Nucleus
MIS cgeneric keywords: liner##agn##galactic##nucleus##nuclei##liners##galaxy
MIS cnatural name: LINER AGN
SIMBA dname: LINER
SIMBA dshort code: LIN
type: Class
subclass of: AGN

LTypeIrregularStar
MIS cgeneric keywords: l##ltype##type##irregular##stars##star
MIS cnatural name: L-type Irregular Star
type: Class
subclass of: LongPeriodVariable
disjoint with: MiraCeti
disjoint with: SemiRegularPulsatingStar

LargeSeparationRadioLobes
MIS cgeneric keywords: large##separation##lobes##radio
MIS cnatural name: Large Separation Lobes
type: Class
subclass of: Morphology
subclass of: Restriction
  all values from: HighPowerRadioLoudAGN
  on property: isMorphologyOf
subclass of: Class
  complement of: SmallSeparationRadioLobes
disjoint with: SmallSeparationRadioLobes

LateTypeStar
AD ckeyword: Stars, S
AD ckeyword: Stars, carbon
AD ckeyword: Stars, cyanogen
AD ckeyword: Stars, late-type
IAU thesaurus alias: cool stars
IAU thesaurus label: LATE TYPE STARS
IAU thesaurus token: LateTypeStars
MIS ccomment: Star of the late spectral types
MIS cgeneric keywords: late##type##star##latetype##stars
MIS cnatural name: Late-type Star
VIZIE rkeyword: Stars:late-type
type: Class
subclass of: Star
disjoint with: EarlyTypeStar
disjoint with: FStar
disjoint with: GStar

LensedGalaxy
MIS ccomment: Gravitationnaly Lensed Image of a Galaxy
MIS cgeneric keywords: lensed##gravitationnal##gal##galaxy##galaxies##g
MIS cnatural name: Lensed Galaxy
NE dcode: G_Lens
SIMBA dname: LensedG
SIMBA dshort code: LeG
type: Class
subclass of: Galaxy
subclass of: Restriction
  on property: hasProcess
  some values from: CosmologicalLensing

LensedQuasiStellarObject
MIS ccomment: Gravitationnaly Lensed Image of a Quasar
MIS cgeneric keywords: lensed##quasar##qso##gravitationnaly##quasars##quasistellar##quasi##stellar##qsos
MIS cnatural name: Lensed Quasar
NE dcode: Q_Lens
SIMBA dname: LensedQ
SIMBA dshort code: LeQ
type: Class
subclass of: HighPowerRadioQuietAGN QSO
subclass of: Restriction
  on property: hasProcess
  some values from: CosmologicalLensing

Lensing
AD ckeyword: Gravitational lensing
IAU thesaurus label: GRAVITATIONAL LENSES
IAU thesaurus token: GravitationalLenses
MIS cgeneric keywords: lensing##process##processes##lens
MIS cnatural name: Lensing Process
VIZIE rkeyword: Gravitational_lensing
type: Class
subclass of: Process

LenticularGalaxy
IAU thesaurus label: EARLY TYPE GALAXIES
IAU thesaurus token: EarlyTypeGalaxies
MIS cgeneric keywords: lenticular##gal##galaxy##galaxies##g
MIS cnatural name: Lenticular Galaxy
type: Class
subclass of: Galaxy

LightCurve
IAU thesaurus label: LIGHT CURVES
IAU thesaurus token: LightCurves
MIS cgeneric keywords: light##curve
MIS cnatural name: Light Curve
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

LineEmission
IAU thesaurus alias: herbig stars
IAU thesaurus label: Ae STARS
IAU thesaurus label: EMISSION LINES
IAU thesaurus token: AeStars
IAU thesaurus token: EmissionLines
MIS cgeneric keywords: emission##line##lines##process##processes
MIS cnatural name: Line Emission
type: Class
subclass of: Emission

LineWidth
IAU thesaurus alias: spectral line widths
IAU thesaurus label: LINE WIDTHS
IAU thesaurus label: LineWidths
MIS cgeneric keywords: line##width
MIS cnatural name: Line Width
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

LobeDominated
MIS ccomment: Core/Extended Flux Ratio < 1)
MIS cgeneric keywords: lobe##dominated##lobedominated
MIS cnatural name: Lobe Dominated
type: Class
subclass of: Morphology
subclass of: Class
  complement of: CoreDominated
subclass of: Restriction
  all values from: Class
    union of: FanaroffRileyTypeI
    union of: FanaroffRileyTypeII
  on property: isMorphologyOf
disjoint with: CoreDominated

LongPeriodVariable
IAU thesaurus label: LONG PERIOD VARIABLE STARS
IAU thesaurus token: LongPeriodVariableStars
MIS cgeneric keywords: lpv##long##period##variable##variables##stars##star
MIS cnatural name: Long-period Variable
type: Class
subclass of: LateTypeStar
subclass of: PulsatingStellarObject
subclass of: Class
  union of: AsymptoticGiantBranchStar
  union of: RedSuperGiant
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: WVirginisStar

LowMassXRayBinary
MIS cdescription: 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.
MIS cgeneric keywords: x##ray##xray##binary##binaries##low##mass##lmxb##lmxrb
MIS cnatural name: Low-mass X-ray Binary
SIMBA dname: LMXB
SIMBA dshort code: LXB
type: Class
subclass of: GammaRaySource
subclass of: XRayBinary
subclass of: Restriction
  all values from: Class
    union of: DwarfStar
    union of: RedGiant
    union of: StellarRemnant
  on property: hasComponent
disjoint with: HighMassXrayBinary
disjoint with: Magnetar

LowPowerRadioLoudAGN
MIS cgeneric keywords: low##power##radio##loud##agn##active##galactic##nucleus##nuclei##lowpower##radioloud##galaxy
MIS cnatural name: Low-Power Radio-loud AGN
type: Class
subclass of: RadioLoudAGN

LowPowerRadioQuietAGN Seyfert
AD ckeyword: Galaxies, Seyfert
IAU thesaurus label: SEYFERT GALAXIES
IAU thesaurus label: SEYFERT NUCLEI
IAU thesaurus token: SeyfertGalaxies
IAU thesaurus token: SeyfertNuclei
MIS cgeneric keywords: low##power##radio##quiet##agn##active##galaxy##nucleus##seyfert##galactic##nuclei##seyferts
MIS cnatural name: Seyfert Galaxy
SIMBA dname: Seyfert
SIMBA dshort code: SyG
VIZIE rkeyword: Seyfert_Galaxies
type: Class
subclass of: InfraredSource
subclass of: RadioQuietAGN
subclass of: UltraVioletSource
subclass of: XRaySource
subclass of: Restriction
  on property: isComponentOf
  some values from: Class
    union of: IrregularGalaxy
    union of: SpiralGalaxy
subclass of: Restriction
  on property: hasPortion
  some values from: Jet
disjoint with: HighPowerRadioQuietAGN QSO
disjoint with: MiraCeti
disjoint with: MolecularCloud
disjoint with: OHIREnvelopeTypeStar
disjoint with: Pulsar
disjoint with: RSCanumVenaticorum
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri
disjoint with: XRayBinary

LowSurfaceBrightnessGalaxy
MIS cgeneric keywords: low##surface##brightness##lsb##gal##galaxy##galaxies##g
MIS cnatural name: Low Surface Brightness Galaxy
SIMBA dname: LSB_G
SIMBA dshort code: LSB
type: Class
subclass of: Galaxy

LumX
MIS cgeneric keywords: lumx
MIS cnatural name: LumX
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

LuminosityClass
IAU thesaurus label: LUMINOSITY CLASS
IAU thesaurus label: LUMINOSITY CLASSIFICATION
IAU thesaurus token: LuminosityClass
IAU thesaurus token: LuminosityClassification
MIS cgeneric keywords: luminosity##class
MIS cnatural name: Luminosity Class
type: Class
subclass of: ClassificationCategory
subclass of: Restriction
  all values from: StellarObject
  on property: isClassificationOf
subclass of: Class
  complement of: Restriction
    on property: isClassificationOf
    some values from: StellarBlackHole
subclass of: Class
  complement of: Restriction
    on property: isClassificationOf
    some values from: NeutronStar
disjoint with: SpectralType

LuminosityClassI
SIMBA dluminosity class: I
type: Class
subclass of: LuminosityClass
subclass of: Restriction
  all values from: SuperGiantStar
  on property: isClassificationOf
disjoint with: LuminosityClassII
disjoint with: LuminosityClassIII
disjoint with: LuminosityClassIV
disjoint with: LuminosityClassV

LuminosityClassII
SIMBA dluminosity class: II
type: Class
subclass of: LuminosityClass
subclass of: Restriction
  all values from: BrilliantGiantStar
  on property: isClassificationOf
disjoint with: LuminosityClassIII
disjoint with: LuminosityClassIV
disjoint with: LuminosityClassV

LuminosityClassIII
SIMBA dluminosity class: III
type: Class
subclass of: LuminosityClass
subclass of: Restriction
  all values from: GiantStar
  on property: isClassificationOf
disjoint with: LuminosityClassIV
disjoint with: LuminosityClassV

LuminosityClassIV
SIMBA dluminosity class: IV
type: Class
subclass of: LuminosityClass
subclass of: Restriction
  all values from: SubGiantStar
  on property: isClassificationOf
disjoint with: LuminosityClassV

LuminosityClassV
SIMBA dluminosity class: V
type: Class
subclass of: LuminosityClass
subclass of: Restriction
  all values from: DwarfStar
  on property: isClassificationOf

MISCcomment
MIS ccomment: any kind of comment on an element of the ontology
type: AnnotationProperty
type: DatatypeProperty
range: string

MISCdescription
MIS cdescription: Text definition of a concept, as complete as possible
type: AnnotationProperty
type: DatatypeProperty
range: string

MISCexternalTests
MIS cdescription: tests that should be taken care of outside of the ontology (e.g. check that a value is within sensible boundaries)
type: AnnotationProperty
type: DatatypeProperty
range: string

MISCgenericKeywords
MIS cdescription: keywords for various purposes like plain text search
type: AnnotationProperty
type: DatatypeProperty
range: string

MISCnaturalName
MIS cdescription: name in natural language for display purposes
type: AnnotationProperty
type: DatatypeProperty
range: string

MISCregistryAlternateSingleSubject
MIS cregistry alternate single subject: non-standardized keywords used in registry subjects
type: AnnotationProperty
type: DatatypeProperty
range: string

MStar
IAU thesaurus label: M STARS
IAU thesaurus token: MStars
MIS ccomment: Star of Spectral Type M
MIS cgeneric keywords: m##star##mstar##mstars##stars
MIS cnatural name: M Star
type: Class
subclass of: LateTypeStar

Magnetar
MIS cgeneric keywords: magnetar##pulsar##magnetic##field##pulsars##magnetars
MIS cnatural name: Magnetar
type: Class
subclass of: GammaRaySource
subclass of: Pulsar
disjoint with: HighMassXrayBinary
disjoint with: LowMassXRayBinary

MagneticField
AD ckeyword: Magnetic fields
IAU thesaurus label: MAGNETIC FIELDS
IAU thesaurus token: MagneticFields
MIS cgeneric keywords: magnetic##field
MIS cnatural name: magnetic Field
VIZIE rkeyword: Magnetic_fields
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

Maser
AD ckeyword: Maser
AD ckeyword: Stars, masers
IAU thesaurus label: MASERS
IAU thesaurus token: Masers
MIS cgeneric keywords: maser
MIS cnatural name: Maser
SIMBA dname: Maser
SIMBA dshort code: Mas
VIZIE rkeyword: Masers
type: Class
subclass of: RadioSource
subclass of: Restriction
  on property: hasProcess
  some values from: MaserEmission

MaserEmission
MIS cgeneric keywords: emission##maser##process##processes
MIS cnatural name: Maser Emission
type: Class
subclass of: Emission
subclass of: Restriction
  all values from: Maser
  on property: isProcessOf
disjoint with: SynchrotronEmission

Mass
IAU thesaurus label: MASS
IAU thesaurus token: Mass
MIS cgeneric keywords: mass
MIS cnatural name: Mass
VIZIE rkeyword: Masses
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

Measurement
IAU thesaurus label: MEASUREMENT
IAU thesaurus token: Measurement
MIS ccomment: Measured observational parameters/properties
MIS cgeneric keywords: measure##measurement##measures##measurements
MIS cnatural name: Measurement
type: Class
disjoint with: AstrObject
disjoint with: AstroPortion
disjoint with: AtomicElement
disjoint with: ClassificationCategory
disjoint with: EMSpectrumRange
disjoint with: Morphology
disjoint with: Process

MetricRadioSource
MIS cgeneric keywords: radio##source##metric
MIS cnatural name: Metric Radio Source
SIMBA dname: Radio(m)
SIMBA dshort code: mR
type: Class
subclass of: RadioSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: RadioMetric

MicroLensing
IAU thesaurus label: MICROLENSING
IAU thesaurus token: Microlensing
MIS cgeneric keywords: microlensing##micro##lensing##process##processes
MIS cnatural name: Micro-lensing
type: Class
subclass of: Lensing
disjoint with: CosmologicalLensing

MillimetricRadioSource
AD ckeyword: Millimetric/submm sources
MIS cgeneric keywords: millimetric##radio##source
MIS cnatural name: Millimetric Radio Source
SIMBA dname: Radio(mm)
SIMBA dshort code: mm
type: Class
subclass of: RadioSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: RadioMillimetric

MiraCeti
GCV scode: M
IAU thesaurus alias: miras
IAU thesaurus alias: omicron ceti stars
IAU thesaurus alias: zeta aurigae stars
IAU thesaurus label: MIRA VARIABLE STARS
IAU thesaurus token: MiraVariableStars
MIS ccomment: Variable Star of Mira Cet type
MIS cdescription: 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.
MIS cgeneric keywords: mira##ceti##omicron##variable##variables##stars##star##miraceti
MIS cnatural name: Mira Ceti Variable
SIMBA dname: Mira
SIMBA dshort code: Mi*
type: Class
subclass of: InfraredSource
subclass of: LongPeriodVariable
disjoint with: LTypeIrregularStar
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MolecularCloud
disjoint with: OHIREnvelopeTypeStar
disjoint with: SemiRegularPulsatingStar
disjoint with: StarburstGalaxy

MolecularCloud
AD ckeyword: Molecular clouds
IAU thesaurus label: DARK NEBULAE
IAU thesaurus label: GIANT MOLECULAR CLOUDS
IAU thesaurus label: MOLECULAR CLOUDS
IAU thesaurus token: DarkNebulae
IAU thesaurus token: GiantMolecularClouds
IAU thesaurus token: MolecularClouds
MIS cgeneric keywords: molecular##cloud##clouds
MIS cnatural name: Molecular Cloud
NE dcode: MCld
SIMBA dname: MolCld
SIMBA dshort code: MoC
type: Class
subclass of: Cloud
subclass of: InfraredSource
subclass of: RadioSource
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MiraCeti
disjoint with: OHIREnvelopeTypeStar
disjoint with: Pulsar
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

Molecules
IAU thesaurus label: MOLECULES
IAU thesaurus token: Molecules
MIS cgeneric keywords: molecules##molecule
MIS cnatural name: Molecules
type: Class
subclass of: AstroPortion
subclass of: Restriction
  all values from: MolecularCloud
  on property: isPortionOf

Morphology
AD ckeyword: Morphology
IAU thesaurus label: MORPHOLOGY
IAU thesaurus token: Morphology
MIS ccomment: Geometry or morphology of astronomical objects (including components which are not astronomical objects)
MIS cgeneric keywords: morphology##morphological##geometry##geometrical##feature##features
MIS cnatural name: Morphological Feature
type: Class
disjoint with: AstrObject
disjoint with: AstroPortion
disjoint with: AtomicElement
disjoint with: ClassificationCategory
disjoint with: EMSpectrumRange
disjoint with: Measurement
disjoint with: Process

MorphologyCompoundObject
MIS cgeneric keywords: compound##object##morphology
MIS cnatural name: Compound Object Morphology
type: Class
subclass of: Morphology
subclass of: Restriction
  all values from: CompoundObject
  on property: isMorphologyOf

MultipleStar
AD ckeyword: Stars, double and multiple
IAU thesaurus alias: triple stars
IAU thesaurus label: MULTIPLE STARS
IAU thesaurus token: MultipleStars
MIS ccomment: A system of two or more distinct stars
MIS cgeneric keywords: multiple##star##stars##system
MIS cnatural name: Multiple Star
SIMBA dname: Double or multiple star
SIMBA dshort code: **
VIZIE rkeyword: Multiple_Stars
type: Class
subclass of: CompoundObject
subclass of: StellarObject
subclass of: Restriction
  min cardinality: 2
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: PlanetaryNebula
disjoint with: SuperClusterOfGalaxies

NEDcode
MIS cdescription: NED object type code
type: AnnotationProperty
type: DatatypeProperty
range: string

NearInfrared
IAU thesaurus label: NEAR INFRARED RADIATION
IAU thesaurus token: NearInfraredRadiation
MIS ccomment: Wavelength under 10 microns
MIS cgeneric keywords: near##ir##infrared
MIS cnatural name: Near Infrared
type: Class
subclass of: Infrared
disjoint with: FarInfrared

NearInfraredSource
MIS cgeneric keywords: near##ir##infrared##source
MIS cnatural name: Near-IR Source
MIS cregistry alternate single subject: Near IR
SIMBA dname: IR<10µ
SIMBA dshort code: NIR
type: Class
subclass of: InfraredSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: NearInfrared

Nebula
AD ckeyword: Nebula
IAU thesaurus label: BRIGHT NEBULAE
IAU thesaurus label: COMPACT NEBULAE
IAU thesaurus label: DIFFUSE NEBULAE
IAU thesaurus label: FILAMENTARY NEBULAE
IAU thesaurus label: FILAMENTS [NEBULAE]
IAU thesaurus label: GASEOUS NEBULAE
IAU thesaurus label: NEBULAE
IAU thesaurus token: BrightNebulae
IAU thesaurus token: CompactNebulae
IAU thesaurus token: DiffuseNebulae
IAU thesaurus token: FilamentaryNebulae
IAU thesaurus token: FilamentsNebulae
IAU thesaurus token: GaseousNebulae
IAU thesaurus token: Nebulae
MIS cgeneric keywords: neb##nebula##nebulae
MIS cregistry alternate single subject: Nebula
MIS cregistry alternate single subject: Nebulae
NE dcode: Neb
VIZIE rkeyword: Nebula
type: Class
subclass of: InterStellarMedium

NeutralGas
IAU thesaurus label: NEUTRAL GASES
IAU thesaurus token: NeutralGases
MIS cgeneric keywords: neutral##gas##gases
MIS cnatural name: Neutral Gas
type: Class
subclass of: AstroPortion

NeutronStar
IAU thesaurus label: NEUTRON STARS
IAU thesaurus token: NeutronStars
MIS cgeneric keywords: neutron##star##stars
MIS cnatural name: Neutron Star
type: Class
subclass of: StellarRemnant
subclass of: Restriction
  on property: hasMeasurement
  some values from: MagneticField
disjoint with: PlanetaryNebulaCentralStar
disjoint with: StellarBlackHole
disjoint with: WhiteDwarf

NonPeriodicProcess
MIS cgeneric keywords: non##not##periodic##process##processes
MIS cnatural name: Non-periodic process
type: Class
subclass of: Process
subclass of: Restriction
  all values from: Class
    intersection of: AstrObject
    intersection of: Class
      complement of: Restriction
        on property: hasMeasurement
        some values from: Period
  on property: isProcessOf

NonRadialPulsation
MIS cgeneric keywords: not##non##radial##pulsation##pulse##pulsating##process##processes
MIS cnatural name: Non-radial Pulsation
type: Class
subclass of: Pulsation
subclass of: Class
  complement of: RadialPulsation
disjoint with: RadialPulsation

NonStellarBody
AD ckeyword: Nonstellar objects
MIS cgeneric keywords: non##stellar##body##bodies##object##objects##nonstellar
MIS cnatural name: Non-stellar Body
VIZIE rkeyword: Nonstellar
VIZIE rkeyword: Planets+Asteroids
type: Class
subclass of: SubStellarObject
subclass of: Class
  complement of: StellarObject

Nova
AD ckeyword: Novae
GCV scode: N
IAU thesaurus alias: prenovas
IAU thesaurus alias: symbiotic novas
IAU thesaurus label: NOVAS
IAU thesaurus token: Novas
MIS cdescription: 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.
MIS cgeneric keywords: nova##novae
MIS cnatural name: Nova
NE dcode: Nova
SIMBA dname: Nova
SIMBA dshort code: No*
VIZIE rkeyword: Novae
type: Class
subclass of: CataclysmicVariable
disjoint with: AMHerCataclysmicVariable
disjoint with: DQHerCataclysmicVariable
disjoint with: RSCanumVenaticorum

NovaLikeObject
GCV scode: NL
MIS cdescription: 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.
MIS cgeneric keywords: novalike##like##nova##object##objects
MIS cnatural name: Nova-like Object
SIMBA dname: Nova-like
SIMBA dshort code: NL*
type: Class
subclass of: CataclysmicVariable
disjoint with: AMHerCataclysmicVariable
disjoint with: DQHerCataclysmicVariable
disjoint with: RSCanumVenaticorum

OBAssociation
IAU thesaurus label: OB ASSOCIATIONS
IAU thesaurus token: ObAssociations
MIS ccomment: association of stars of type O or B
MIS cgeneric keywords: association##star##stars##associations##ob##o##b
type: Class
subclass of: AssociationOfStars
subclass of: Restriction
  all values from: Class
    union of: BStar
    union of: OStar
  on property: hasComponent

OHIREnvelopeTypeStar
IAU thesaurus label: COCOON STARS
IAU thesaurus label: OH IR STARS
IAU thesaurus token: CocoonStars
IAU thesaurus token: OhIrStars
MIS cgeneric keywords: oh##ir##envelope##star##stars##ohir
MIS cnatural name: OH/IR Envelope-type Star
SIMBA dname: OH/IR
SIMBA dshort code: OH*
type: Class
subclass of: AsymptoticGiantBranchStar
subclass of: InfraredSource
subclass of: Maser
subclass of: RedSuperGiant
disjoint with: CarbonStar
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MiraCeti
disjoint with: MolecularCloud
disjoint with: SStar
disjoint with: StarburstGalaxy

OStar
AD ckeyword: Stars, O
IAU thesaurus label: O STARS
IAU thesaurus token: OStars
MIS ccomment: Star of Spectral Type O
MIS cgeneric keywords: o##star##ostar##stars##ostars
MIS cnatural name: O Star
type: Class
subclass of: EarlyTypeStar

OldDisk
MIS ccomment: Galactic Sperical Component (old disk)
MIS cgeneric keywords: old##disk##galactic##sperical##component##disks##components
MIS cnatural name: Old Disk
type: Class
subclass of: PortionOfGalaxy
disjoint with: Halo
disjoint with: SpiralArm

OpenCluster
AD ckeyword: Clusters, open
IAU thesaurus alias: galactic clusters
IAU thesaurus label: OPEN STAR CLUSTERS
IAU thesaurus token: OpenStarClusters
MIS cgeneric keywords: open##cluster##star##stars##clusters
MIS cnatural name: Open Cluster
SIMBA dname: OpCl
SIMBA dshort code: OpC
VIZIE rkeyword: Open_clusters
type: Class
subclass of: ClusterOfStars
disjoint with: GlobularCluster

Optical
MIS cgeneric keywords: optical
MIS cnatural name: Optical
VIZIE rkeyword: optical
type: Class
subclass of: EMSpectrumRange
disjoint with: GammaRays
disjoint with: Infrared
disjoint with: Radio
disjoint with: UltraViolet
disjoint with: XRays

OpticalSource
MIS cgeneric keywords: optical##source
MIS cnatural name: Optical Source
MIS cregistry alternate single subject: Optical
type: Class
subclass of: EMSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: Optical

OpticallyViolentlyVariableQuasar
MIS cgeneric keywords: ovv##optically##variable##objects##object
MIS cnatural name: Optically Violently Variable Object
SIMBA dname: OVV
SIMBA dshort code: OVV
type: Class
subclass of: FlatSpectrumRadioQuasar
disjoint with: Blazar

OrionVariableStar
GCV scode: IN
IAU thesaurus label: ORION POPULATION STARS
IAU thesaurus token: OrionPopulationStars
MIS ccomment: Variable Star of Orion type
MIS cdescription: 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.
MIS cgeneric keywords: orion##variable##star##stars##variables
MIS cnatural name: Orion Variable Star
SIMBA dname: Orion_V*
SIMBA dshort code: Or*
type: Class
subclass of: EruptiveVariableStellarObject
subclass of: IrregularVariableStellarObject
subclass of: PreMainSequenceStar
disjoint with: CataclysmicVariable
disjoint with: RCoronaeBorealis

Parallax
AD ckeyword: Parallaxes, trigonometric
IAU thesaurus label: PARALLAXES
IAU thesaurus token: Parallaxes
VIZIE rkeyword: Parallaxes
type: Class
subclass of: Measurement
subclass of: Restriction
  all values from: Class
    union of: MultipleStar
    union of: OpenCluster
    union of: StellarObject
    union of: SubStellarObject
  on property: isMeasuredFor
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

PartOfCloud
MIS cgeneric keywords: part##of##cloud##parts##clouds
MIS cnatural name: Part Of Cloud
SIMBA dname: PartofCloud
SIMBA dshort code: PoC
type: Class
subclass of: AstroPortion

PartOfGalaxy
MIS cgeneric keywords: part##of##galaxy##parts##galaxies
MIS cnatural name: Part of Galaxy
NE dcode: PofG
SIMBA dname: PartofG
SIMBA dshort code: PoG
type: Class
subclass of: PortionOfGalaxy

PeculiarGalaxy
AD ckeyword: Galaxies, peculiar
IAU thesaurus label: PECULIAR GALAXIES
IAU thesaurus token: PeculiarGalaxies
MIS cgeneric keywords: peculiar##gal##galaxy##galaxies##g
MIS cnatural name: Peculiar Galaxy
type: Class
subclass of: Galaxy

PeculiarStar
AD ckeyword: Stars, Am
AD ckeyword: Stars, Ap
AD ckeyword: Stars, Bp
AD ckeyword: Stars, barium
AD ckeyword: Stars, metal-deficient
AD ckeyword: Stars, peculiar
IAU thesaurus label: Am STARS
IAU thesaurus label: Ap STARS
IAU thesaurus label: Bw STARS
IAU thesaurus label: PECULIAR STARS
IAU thesaurus token: AmStars
IAU thesaurus token: ApStars
IAU thesaurus token: BwStars
IAU thesaurus token: PeculiarStars
MIS cgeneric keywords: peculiar##star##stellar##object
MIS cnatural name: Peculiar Stellar Object
SIMBA dname: Pec*
SIMBA dshort code: Pe*
VIZIE rkeyword: Stars:peculiar
type: Class
subclass of: Star

Period
IAU thesaurus label: PERIOD
IAU thesaurus token: Period
MIS cgeneric keywords: period
MIS cnatural name: Period
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

Photosphere
IAU thesaurus label: PHOTOSPHERE
IAU thesaurus token: Photosphere
MIS cgeneric keywords: photosphere
MIS cnatural name: Photosphere
type: Class
subclass of: PortionOfStellarObject

Planet
AD ckeyword: Planets
IAU thesaurus label: EXTRASOLAR PLANETS
IAU thesaurus label: GIANT PLANETS
IAU thesaurus label: PLANETS
IAU thesaurus token: ExtrasolarPlanets
IAU thesaurus token: GiantPlanets
IAU thesaurus token: Planets
MIS ccomment: (Extra-solar) Planet (or candidate)
MIS cgeneric keywords: planet##planets
MIS cnatural name: Planet
MIS cregistry alternate single subject: Planets
SIMBA dname: Planet?
SIMBA dshort code: Pl?
type: Class
subclass of: NonStellarBody
disjoint with: Asteroid
disjoint with: Comet

PlanetaryNebula
AD ckeyword: Planetary nebulae
IAU thesaurus label: PLANETARY NEBULAE
IAU thesaurus token: PlanetaryNebulae
MIS ccomment: A planetary nebula is a nebula surrounding a stellar remnant (white dwarf)
MIS cgeneric keywords: planetary##nebula##nebulae
MIS cnatural name: Planetary Nebula
NE dcode: PN
SIMBA dname: PN
SIMBA dshort code: PN
VIZIE rkeyword: Planetary_Nebulae
type: Class
subclass of: CompoundObject
subclass of: Restriction
  all values from: Class
    union of: PlanetaryNebulaCentralStar
    union of: PlanetaryNebulaShell
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: MultipleStar
disjoint with: SuperClusterOfGalaxies

PlanetaryNebulaCentralStar
IAU thesaurus label: CENTRAL STARS
IAU thesaurus token: CentralStars
MIS cgeneric keywords: planetary##nebula##central##star##stars
MIS cnatural name: Planetary Nebula Central Star
type: Class
subclass of: StellarRemnant
subclass of: Restriction
  all values from: PlanetaryNebula
  on property: isComponentOf
disjoint with: NeutronStar
disjoint with: StellarBlackHole
disjoint with: WhiteDwarf

PlanetaryNebulaShell
MIS cgeneric keywords: planetary##nebula##shell##shells##nebulae
MIS cnatural name: Planetary Nebula Shell
SIMBA dname: PN
SIMBA dshort code: PN
type: Class
subclass of: EmissionNebula
subclass of: Restriction
  all values from: PlanetaryNebulaCentralStar
  on property: isIonizedBy
subclass of: Restriction
  all values from: PlanetaryNebula
  on property: isComponentOf
disjoint with: HIIRegion
disjoint with: SupernovaRemnantShell

PolarRingGalaxy
MIS cgeneric keywords: polar##ring##gal##galaxy##galaxies##g
MIS cnatural name: Polar Ring Galaxy
type: Class
subclass of: RingGalaxy

Polarization
IAU thesaurus alias: light polarization
IAU thesaurus label: POLARIZATION [WAVES]
IAU thesaurus token: PolarizationWaves
MIS cgeneric keywords: polarization
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

PortionOfGalaxy
MIS ccomment: Any component of a galaxy
MIS cgeneric keywords: portion##of##galaxy##galaxies##portions
MIS cnatural name: Portion of Galaxy
type: Class
subclass of: AstroPortion
subclass of: Restriction
  all values from: Galaxy
  on property: isPortionOf
disjoint with: PortionOfStellarObject

PortionOfStellarObject
MIS ccomment: any component of a stellar object
MIS cgeneric keywords: portion##of##stellar##object##objects##portions
MIS cnatural name: Portion of Stellar Object
type: Class
subclass of: AstroPortion
subclass of: Restriction
  all values from: Class
    union of: MultipleStar
    union of: StellarObject
  on property: isPortionOf
disjoint with: PortionOfGalaxy

PostAsymptoticGiantBranchStar
MIS cgeneric keywords: postagb##post##agb##asymptotic##giant##branch##star
MIS cnatural name: Post-AGB Star
SIMBA dname: post-AGB*
SIMBA dshort code: pA*
type: Class
subclass of: GiantStar

PostTTauri
MIS ccomment: Naked T Tauri stars are basically the same as Post-T Tauri stars.
MIS cdescription: 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.
MIS cgeneric keywords: ptts##post#t##tauri##ttauri##star##stars##post-t
MIS cnatural name: Post-T Tauri Star
type: Class
subclass of: YoungStellarObject

PowerRadio
MIS cgeneric keywords: power##radio
MIS cnatural name: Power Radio
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

PowerRadioGhz
MIS cgeneric keywords: power##radio##ghz##radioghz##powerradioghz
MIS cnatural name: Power Radio Ghz
type: Class
subclass of: PowerRadio
disjoint with: PowerRadioMhz

PowerRadioMhz
MIS cgeneric keywords: power##radio##mhz##powerradiomhz##radiomhz
MIS cnatural name: Power Radio Mhz
type: Class
subclass of: PowerRadio

PreMainSequenceStar
AD ckeyword: Stars, pre-main sequence
IAU thesaurus alias: early stage stars
IAU thesaurus label: PREMAINSEQUENCE STARS
IAU thesaurus token: PremainsequenceStars
MIS cdescription: Pre-Main-Sequence Object (PMS) (NJE) 1. Observational, a star that lies above the main sequence.
MIS cgeneric keywords: pre##main##sequence##star##stars
MIS cnatural name: Pre-Main Sequence Star
SIMBA dname: pMS*
SIMBA dshort code: pr*
type: Class
subclass of: YoungStellarObject
subclass of: Class
  complement of: Restriction
    on property: hasPortion
    some values from: CircumstellarDisk
disjoint with: ProtoStar

Process
MIS ccomment: Phenomenon or associated process
MIS cgeneric keywords: process
MIS cgeneric keywords: process##processes
MIS cnatural name: Process
type: Class
disjoint with: AstrObject
disjoint with: AstroPortion
disjoint with: AtomicElement
disjoint with: ClassificationCategory
disjoint with: EMSpectrumRange
disjoint with: Measurement
disjoint with: Morphology

ProperMotion
AD ckeyword: Proper motions
IAU thesaurus alias: ProperMotions
IAU thesaurus label: PROPER MOTIONS
MIS ccomment: component of SpaceVelocity
MIS cgeneric keywords: pm##proper##motion
MIS cnatural name: Proper Motion
VIZIE rkeyword: Proper_Motions
type: Class
subclass of: Velocity
subclass of: Restriction
  all values from: Class
    intersection of: Class
      union of: MultipleStar
      union of: OpenCluster
      union of: StellarObject
      union of: SubStellarObject
    intersection of: Class
      complement of: Restriction
        on property: hasMeasurement
        some values from: Redshift
  on property: isMeasuredFor
disjoint with: RadialVelocity
disjoint with: Redshift
disjoint with: SpaceVelocity
disjoint with: VelocityDispersion

ProtoPlanetaryDisk
MIS ccomment: alternate name: proplyd
MIS cdescription: protoplanetary disk (CL) 1. Physical, a primordial disk with the potential to form planets.
MIS cgeneric keywords: protoplanetary##proto##planetary##disk##proplyd##proplyds##disks
MIS cnatural name: Protoplanetary disk
type: Class
subclass of: CircumstellarDisk
subclass of: Restriction
  all values from: ProtoStar
  on property: isPortionOf

ProtoStar
AD ckeyword: Protostars
IAU thesaurus label: PROTOSTARS
IAU thesaurus token: Protostars
MIS cdescription: 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.
MIS cgeneric keywords: protostar##proto##star##protostars##stars
MIS cnatural name: Protostar
type: Class
subclass of: SubMillimetricRadioSource
subclass of: YoungStellarObject
disjoint with: PreMainSequenceStar

Pulsar
AD ckeyword: Pulsars
GCV scode: PSR
IAU thesaurus label: PULSARS
IAU thesaurus token: Pulsars
MIS cdescription: 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.
MIS cgeneric keywords: pulsar##psr##pulsars
MIS cnatural name: Pulsar
MIS cregistry alternate single subject: Pulsar
NE dcode: Psr
SIMBA dname: Pulsar
SIMBA dshort code: Psr
VIZIE rkeyword: Pulsars
type: Class
subclass of: NeutronStar
subclass of: OpticalSource
subclass of: RadioSource
subclass of: RotationallyVariableStellarObject
subclass of: XRaySource
disjoint with: AGN
disjoint with: Alpha2CanumVenaticorum
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MolecularCloud
disjoint with: RSCanumVenaticorum
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri
disjoint with: XRayBinary

PulsatingAlpha2CVn
MIS cgeneric keywords: pulsating##alpha##2##alpha2##cv##cvn##canum##venaticorum
MIS cnatural name: Pulsating Alpha2 Canum Venaticorum
type: Class
subclass of: Alpha2CanumVenaticorum
subclass of: PulsatingStellarObject
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: WVirginisStar

PulsatingStellarObject
IAU thesaurus label: PULSATING VARIABLE STARS
IAU thesaurus token: PulsatingVariableStars
MIS ccomment: Pulsating Variable Star
MIS cdescription: 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.
MIS cgeneric keywords: pulsating##variable##star##variables##stars
MIS cnatural name: Pulsating Star
SIMBA dname: PulsV*
SIMBA dshort code: Pu*
type: Class
subclass of: VariableStellarObject
subclass of: Restriction
  on property: hasProcess
  some values from: Pulsation

PulsatingWhiteDwarf
MIS cgeneric keywords: pulsating##white##dwarf##wd
MIS cnatural name: Pulsating White Dwarf
SIMBA dname: PulsWD*
SIMBA dshort code: ZZ*
type: Class
subclass of: PulsatingStellarObject
subclass of: WhiteDwarf
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: WVirginisStar

Pulsation
IAU thesaurus label: DOUBLE MODE PULSATION
IAU thesaurus label: PULSATIONS
IAU thesaurus token: DoubleModePulsation
IAU thesaurus token: Pulsations
MIS cgeneric keywords: pulsation##process##processes##pulse##pulsating
MIS cnatural name: Pulsation Process
type: Class
subclass of: Process

QSO1AGN
MIS ccomment: Type1 QSO Active Galactic Nucleus
MIS cgeneric keywords: qso##quasi##stellar##object##quasar##type1##type##1##quasars##objects##quasistellar##qsos
MIS cnatural name: QSO type 1
type: Class
subclass of: HighPowerRadioQuietAGN QSO
disjoint with: QSO2AGN

QSO2AGN
MIS ccomment: Type2 QSO Active Galactic Nucleus
MIS cgeneric keywords: qso##2##quasar##qso2##object##objects##quasi##stellar##quasistellar##type##2##type2##quasars##qsos
MIS cnatural name: QSO2
type: Class
subclass of: HighPowerRadioQuietAGN QSO
disjoint with: QSO1AGN

RCoronaeBorealis
GCV scode: RCB
IAU thesaurus alias: rcb stars
IAU thesaurus label: R CORONAE BOREALIS STARS
IAU thesaurus token: RCoronaeBorealisStars
MIS ccomment: Variable Star of R CrB type
MIS cdescription: 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.
MIS cgeneric keywords: rcb##r##coronae##borealis##variable##variables##stars##star##variable##variables
MIS cnatural name: R Coronae Borealis Variable
SIMBA dname: Erupt*RCrB
SIMBA dshort code: RC*
type: Class
subclass of: EruptiveVariableStellarObject
subclass of: PulsatingStellarObject
subclass of: SuperGiantStar
disjoint with: BSuperGiant
disjoint with: BetaCephei
disjoint with: CataclysmicVariable
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: FlareStar
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: OrionVariableStar
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RRLyrae
disjoint with: RVTauri
disjoint with: RapidIrregularVariableStar
disjoint with: WVirginisStar

RRLyrae
GCV scode: RR
IAU thesaurus alias: ab variable stars
IAU thesaurus alias: cluster type variable stars
IAU thesaurus label: RR LYRAE STARS
IAU thesaurus token: RrLyraeStars
MIS ccomment: Variable Star of RR Lyr type
MIS cdescription: 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).
MIS cgeneric keywords: rr##lyrae##variable##star##stars##variables##rrlyrae
MIS cnatural name: RR Lyrae Variable
SIMBA dname: RRLyr
SIMBA dshort code: RR*
type: Class
subclass of: GiantStar
subclass of: PulsatingStellarObject
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RVTauri
disjoint with: WVirginisStar

RSCanumVenaticorum
GCV scode: RS
MIS ccomment: Variable of RS CVn type
MIS cdescription: 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.
MIS cgeneric keywords: rs##canum##venaticorum##cv##rscv##binary##binaries
MIS cnatural name: RS Canum Venaticorum Variable Star
SIMBA dname: RSCVn
SIMBA dshort code: RS*
type: Class
subclass of: CataclysmicVariable
subclass of: RotationallyVariableStellarObject
subclass of: XRaySource
disjoint with: AMHerCataclysmicVariable
disjoint with: Alpha2CanumVenaticorum
disjoint with: DQHerCataclysmicVariable
disjoint with: DwarfNova
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: Nova
disjoint with: NovaLikeObject
disjoint with: Pulsar
disjoint with: SupernovaRemnantShell
disjoint with: TTauri
disjoint with: XRayBinary

RVTauri
GCV scode: RV
IAU thesaurus label: RV TAURI STARS
IAU thesaurus token: RvTauriStars
MIS ccomment: Variable Star of RV Tau type
MIS cdescription: 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).
MIS cgeneric keywords: rv##tau##tauri##rvtau##rvtauri##star##variable##stars##variables
MIS cnatural name: RV Tauri Variable Star
SIMBA dname: PulsV*RVTau
SIMBA dshort code: RV*
type: Class
subclass of: PulsatingStellarObject
subclass of: SuperGiantStar
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: WVirginisStar

RadialPulsation
MIS cgeneric keywords: radial##pulsation##pulse##pulsating##process##processes
MIS cnatural name: Radial Pulsation
type: Class
subclass of: Pulsation
disjoint with: NonRadialPulsation

RadialVelocity
AD ckeyword: Radial velocities
IAU thesaurus label: RADIAL VELOCITY
IAU thesaurus token: RadialVelocity
MIS ccomment: component of SpaceVelocity
MIS cexternal tests: value < 300000
MIS cgeneric keywords: radial##velocity
MIS cnatural name: Radial Velocity
type: Class
subclass of: Velocity
disjoint with: Redshift
disjoint with: SpaceVelocity
disjoint with: VelocityDispersion

Radio
IAU thesaurus alias: twenty one cm line
IAU thesaurus label: 21 CM LINE
IAU thesaurus label: RADIO EMISSION
IAU thesaurus label: RADIO FREQUENCIES
IAU thesaurus label: RADIO WAVES
IAU thesaurus token: 21CmLine
IAU thesaurus token: RadioEmission
IAU thesaurus token: RadioFrequencies
IAU thesaurus token: RadioWaves
MIS cgeneric keywords: radio
MIS cnatural name: Radio
VIZIE rkeyword: Radio
type: Class
subclass of: EMSpectrumRange
disjoint with: GammaRays
disjoint with: Infrared
disjoint with: Optical
disjoint with: UltraViolet
disjoint with: XRays

RadioCentimetric
MIS cgeneric keywords: radio##cm##centimetric
MIS cnatural name: Radio Centimetric
type: Class
subclass of: Radio
disjoint with: RadioMetric
disjoint with: RadioMillimetric
disjoint with: RadioSubMillimetric

RadioGalaxy
AD ckeyword: Galaxies, radio
IAU thesaurus label: RADIO GALAXY
IAU thesaurus token: RadioGalaxies
MIS cgeneric keywords: radio##gal##galaxy##galaxies##g
MIS cnatural name: Radio Galaxy
SIMBA dname: RadioG
SIMBA dshort code: rG
type: Class
subclass of: Galaxy
subclass of: RadioSource
subclass of: Restriction
  on property: hasPortion
  some values from: Jet
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: MolecularCloud
disjoint with: Pulsar
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

RadioLoudAGN
MIS cgeneric keywords: agn##radio##loud##active##galactic##nucleus##nuclei##galaxy
MIS cnatural name: Radio-loud AGN
type: Class
subclass of: AGN
subclass of: RadioSource
subclass of: Restriction
  all values from: EllipticalGalaxy
  on property: isComponentOf
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: MolecularCloud
disjoint with: Pulsar
disjoint with: RadioGalaxy
disjoint with: RadioQuietAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

RadioMetric
MIS cgeneric keywords: radio##metric##m
MIS cnatural name: Radio Metric
type: Class
subclass of: Radio
disjoint with: RadioCentimetric
disjoint with: RadioMillimetric
disjoint with: RadioSubMillimetric

RadioMillimetric
AD ckeyword: Spectra, millimetric/submm
IAU thesaurus alias: mm radiation
IAU thesaurus label: MILLIMETER RADIATION
IAU thesaurus label: MILLIMETER WAVES
IAU thesaurus token: MillimeterRadiation
IAU thesaurus token: MillimeterWaves
MIS cgeneric keywords: radio##millimetric##mm
MIS cnatural name: Radio Millimetric
type: Class
subclass of: Radio
disjoint with: RadioCentimetric
disjoint with: RadioMetric
disjoint with: RadioSubMillimetric

RadioQuietAGN
MIS cgeneric keywords: radio##quiet##agn##active##galactic##nucleus##nuclei##galaxy
MIS cnatural name: Radio-quiet AGN
type: Class
subclass of: AGN
subclass of: Class
  complement of: RadioLoudAGN
disjoint with: RadioLoudAGN

RadioSource
AD ckeyword: Radio sources
IAU thesaurus label: EXTRAGALACTIC RADIO SOURCES
IAU thesaurus label: RADIO SOURCES
IAU thesaurus token: ExtragalacticRadioSources
IAU thesaurus token: RadioSources
MIS cgeneric keywords: radio##source
MIS cnatural name: Radio Source
MIS cregistry alternate single subject: Radio
MIS cregistry alternate single subject: radio
NE dcode: RadioS
SIMBA dname: Radio
SIMBA dshort code: Rad
type: Class
subclass of: EMSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: Radio

RadioSubMillimetric
AD ckeyword: Spectra, millimetric/submm
IAU thesaurus label: SUBMILLIMETER WAVES
IAU thesaurus token: SubmillimeterWaves
MIS cgeneric keywords: radio##sub##millimetric##submillimetric
MIS cnatural name: Radio Submillimetric
type: Class
subclass of: Radio
disjoint with: RadioCentimetric
disjoint with: RadioMetric
disjoint with: RadioMillimetric

RapidIrregularVariableStar
GCV scode: IS
MIS ccomment: Variable Star with rapid variations
MIS cdescription: 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.
MIS cgeneric keywords: rapid##irregular##variable##star##variables##stars
MIS cnatural name: Rapid Irregular Variable Star
SIMBA dname: Rapid_Irreg_V*
SIMBA dshort code: RI*
type: Class
subclass of: EruptiveVariableStellarObject
subclass of: IrregularVariableStellarObject
disjoint with: CataclysmicVariable
disjoint with: RCoronaeBorealis

Red
MIS cgeneric keywords: red
MIS cnatural name: Red
type: Class
subclass of: Optical

RedGiant
MIS cgeneric keywords: red##redgiant##giant##redgiants##giants
MIS cnatural name: Red Giant
type: Class
subclass of: GiantStar
subclass of: LateTypeStar

RedObject
MIS cgeneric keywords: red##object
MIS cnatural name: Red Object
NE dcode: Red*
SIMBA dname: Red
SIMBA dshort code: red
type: Class
subclass of: EMSource

RedSuperGiant
MIS cgeneric keywords: red##super##giant##supergiant##giants##supergiants
MIS cnatural name: Red Supergiant
type: Class
subclass of: LateTypeStar
subclass of: SuperGiantStar

Redshift
AD ckeyword: Redshifts
IAU thesaurus label: REDSHIFT
IAU thesaurus token: Redshift
MIS cexternal tests: -12 < value < 12
MIS cgeneric keywords: redshift##red##shift
MIS cnatural name: Redshift
VIZIE rkeyword: Redshifts
type: Class
subclass of: Velocity
subclass of: Restriction
  all values from: Class
    intersection of: Class
      union of: AGN
      union of: ClusterOfGalaxies
      union of: GalaxiesGroup
      union of: Galaxy
      union of: GalaxyPair
      union of: LINER
      union of: PartOfGalaxy
      union of: SuperClusterOfGalaxies
    intersection of: Class
      complement of: Restriction
        on property: hasMeasurement
        some values from: ProperMotion
  on property: isMeasuredFor
disjoint with: SpaceVelocity
disjoint with: VelocityDispersion

Reflection
IAU thesaurus label: REFLECTION
IAU thesaurus token: Reflection
MIS ccomment: Reflection of stellar light
MIS cgeneric keywords: reflection##process##processes
MIS cnatural name: Reflection Process
type: Class
subclass of: Process

ReflectionNebula
IAU thesaurus label: REFLECTION NEBULAE
IAU thesaurus token: ReflectionNebulae
MIS cgeneric keywords: reflection##nebula##nebulae
MIS cnatural name: Reflection Nebula
NE dcode: RfN
SIMBA dname: RfNeb
SIMBA dshort code: RNe
type: Class
subclass of: Nebula
subclass of: Restriction
  on property: hasMeasurement
  some values from: Polarization
subclass of: Restriction
  on property: hasProcess
  some values from: Reflection
disjoint with: EmissionNebula

RingGalaxy
AD ckeyword: Galaxies, ring
IAU thesaurus label: RING GALAXIES
IAU thesaurus token: RingGalaxies
MIS cgeneric keywords: ring##gal##galaxy##galaxies##g
MIS cnatural name: Ring Galaxy
type: Class
subclass of: LenticularGalaxy
subclass of: SpiralGalaxy

RocheLobe
IAU thesaurus label: ROCHE LOBE
IAU thesaurus token: RocheLobe
MIS cgeneric keywords: roche##lobe##rochelobe
MIS cnatural name: Roche Lobe
type: Class
subclass of: Morphology
subclass of: Restriction
  all values from: MultipleStar
  on property: isMorphologyOf

Rotation
IAU thesaurus label: ROTATION
IAU thesaurus token: Rotation
MIS cgeneric keywords: rotation##process##processes##rotational
MIS cnatural name: Rotation Process
type: Class
subclass of: Process

RotationPoweredPulsar
MIS cgeneric keywords: rotation##powered##pulsar##psr##pulsars
MIS cnatural name: Rotation-powered Pulsar
type: Class
subclass of: Pulsar
disjoint with: AccretionPoweredPulsar

RotationallyVariableStellarObject
IAU thesaurus label: ROTATING STARS
IAU thesaurus token: RotatingStars
MIS cdescription: 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.
MIS cgeneric keywords: rotational##rotationally##variable##object##star##stars##objects##variables
MIS cnatural name: Rotationally Variable Object
SIMBA dname: RotV*
SIMBA dshort code: Ro*
type: Class
subclass of: VariableStellarObject
subclass of: Restriction
  on property: hasProcess
  some values from: Rotation

SIMBADluminosityClass
MIS cdescription: Main part of the luminosity class in SIMBAD (letters only, found within SIMBAD's spectral type value after said spectral type)
type: AnnotationProperty
type: DatatypeProperty
range: string

SIMBADmorphologicalType
MIS cdescription: morphological type for galaxies in SIMBAD
type: AnnotationProperty
type: DatatypeProperty
range: string

SIMBADname
MIS cdescription: Standard name in Simbad's object classification
type: AnnotationProperty
type: DatatypeProperty
range: string

SIMBADshortCode
MIS cdescription: Short code in Simbad's object classification
type: AnnotationProperty
type: DatatypeProperty
range: string

SIMBADspectralType
MIS cdescription: Main part of the spectral type in SIMBAD (letters only, found at the beginning of SIMBAD's spectral type value)
type: AnnotationProperty
type: DatatypeProperty
range: string

SStar
IAU thesaurus alias: se stars
IAU thesaurus label: S STARS
IAU thesaurus token: SStars
MIS cgeneric keywords: s##type##stype##star##sstar##stars##sstars
MIS cnatural name: S-type Star
SIMBA dname: S*
SIMBA dshort code: S*
type: Class
subclass of: AsymptoticGiantBranchStar
disjoint with: CarbonStar
disjoint with: OHIREnvelopeTypeStar

SemiRegularPulsatingStar
GCV scode: SR
MIS ccomment: Semi-regular pulsating star
MIS cgeneric keywords: semi##regular##semiregular##pulsating##star##stars##reg
MIS cnatural name: Semi-regular Pulsating Star
SIMBA dname: PulsV*semi-reg
SIMBA dshort code: sr*
type: Class
subclass of: LongPeriodVariable
disjoint with: LTypeIrregularStar
disjoint with: MiraCeti

Seyfert15AGN
MIS ccomment: Type1.5 Seyfert Active Galactic Nucleus
MIS cgeneric keywords: seyfert1.5##1.5##seyferts##low##power##radio##quiet##agn##active##galaxy##nucleus##seyfert##galactic##nuclei##seyferts
MIS cnatural name: Seyfert 1.5 Galaxy
SIMBA dname: Seyfert
type: Class
subclass of: LowPowerRadioQuietAGN Seyfert
disjoint with: Seyfert1AGN
disjoint with: Seyfert2AGN

Seyfert1AGN
MIS ccomment: Type1 Seyfert Active Galactic Nucleus
MIS cgeneric keywords: seyfert##seyfert1##1##low##power##radio##quiet##agn##active##galaxy##nucleus##galactic##nuclei##seyferts
MIS cnatural name: Seyfert 1 Galaxy
SIMBA dname: Seyfert_1
SIMBA dshort code: Sy1
type: Class
subclass of: LowPowerRadioQuietAGN Seyfert
disjoint with: Seyfert15AGN
disjoint with: Seyfert2AGN

Seyfert2AGN
MIS ccomment: Type2 Seyfert Active Galactic Nucleus
MIS cgeneric keywords: seyfert2##2low##power##radio##quiet##agn##active##galaxy##nucleus##seyfert##galactic##nuclei##seyferts
MIS cnatural name: Seyfert 2 Galaxy
SIMBA dname: Seyfert_2
SIMBA dshort code: Sy2
type: Class
subclass of: LowPowerRadioQuietAGN Seyfert
disjoint with: Seyfert15AGN
disjoint with: Seyfert1AGN

Shell
IAU thesaurus label: CIRCUMSTELLAR SHELLS
IAU thesaurus token: CircumstellarShells
MIS cgeneric keywords: shell##shells
MIS cnatural name: Shell
type: Class
subclass of: AstroPortion

Shockwave
IAU thesaurus label: IONIZING SHOCK WAVES
IAU thesaurus label: SHOCK WAVES
IAU thesaurus label: ShockWaves
IAU thesaurus token: IonizingShockWaves
MIS ccomment: The shockwave-generating process or the resulting Shockwave
MIS cgeneric keywords: shockwave##shock##wave##waves##shockwaves
MIS cnatural name: Shockwave
type: Class
subclass of: Process

SmallSeparationRadioLobes
MIS cgeneric keywords: small##separation##lobes##radio
type: Class
subclass of: Morphology
subclass of: Class
  complement of: LargeSeparationRadioLobes
disjoint with: LargeSeparationRadioLobes

SpaceVelocity
MIS cgeneric keywords: space##velocity
MIS cnatural name: Space Velocity
type: Class
subclass of: Velocity
disjoint with: VelocityDispersion

SpectralIndex
MIS cgeneric keywords: spectral##index
MIS cnatural name: Spectral Index
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

SpectralType
AD ckeyword: MK spectral classification
AD ckeyword: Spectral types
IAU thesaurus label: SPECTRAL TYPES
IAU thesaurus token: SpectralTypes
MIS ccomment: Any class in Morgan Keeman's spectral classification
MIS cgeneric keywords: spectral##type
MIS cnatural name: Spectral Type
VIZIE rkeyword: Spectral_Classification
type: Class
subclass of: ClassificationCategory

SpectralTypeA
SIMBA dspectral type: A
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: AStar
  on property: isClassificationOf
disjoint with: SpectralTypeB
disjoint with: SpectralTypeC
disjoint with: SpectralTypeDA
disjoint with: SpectralTypeDB
disjoint with: SpectralTypeDC
disjoint with: SpectralTypeDH
disjoint with: SpectralTypeDO
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeA i
MIS ccomment: default instance
type: SpectralTypeA

SpectralTypeB
SIMBA dspectral type: B
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: BStar
  on property: isClassificationOf
disjoint with: SpectralTypeC
disjoint with: SpectralTypeDA
disjoint with: SpectralTypeDB
disjoint with: SpectralTypeDC
disjoint with: SpectralTypeDH
disjoint with: SpectralTypeDO
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeB i
MIS ccomment: default instance
type: SpectralTypeB

SpectralTypeC
SIMBA dspectral type: C
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: CarbonStar
  on property: isClassificationOf
disjoint with: SpectralTypeDA
disjoint with: SpectralTypeDB
disjoint with: SpectralTypeDC
disjoint with: SpectralTypeDH
disjoint with: SpectralTypeDO
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDA
MIS ccomment: white dwarf with hydrogen lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDB
disjoint with: SpectralTypeDC
disjoint with: SpectralTypeDH
disjoint with: SpectralTypeDO
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDB
MIS ccomment: white dwarf with He I lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDC
disjoint with: SpectralTypeDH
disjoint with: SpectralTypeDO
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDC
MIS ccomment: white dwarfs with continuous spectrum
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDH
disjoint with: SpectralTypeDO
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDO
MIS ccomment: white dwarf with He II lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDP
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDP
MIS ccomment: White dwarf with metal lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDQ
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDQ
MIS ccomment: white dwarfs with carbon lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDX
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDX
MIS ccomment: White dwarf with metal lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeDZ
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeDZ
MIS ccomment: White dwarf with metal lines
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: WhiteDwarf
  on property: isClassificationOf
disjoint with: SpectralTypeF
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeF
SIMBA dspectral type: F
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: FStar
  on property: isClassificationOf
disjoint with: SpectralTypeG
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeG
SIMBA dspectral type: G
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: GStar
  on property: isClassificationOf
disjoint with: SpectralTypeK
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeK
SIMBA dspectral type: K
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: KStar
  on property: isClassificationOf
disjoint with: SpectralTypeL
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeL
SIMBA dspectral type: L
type: Class
subclass of: SpectralType
disjoint with: SpectralTypeM
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeM
SIMBA dspectral type: M
type: Class
subclass of: SpectralType
disjoint with: SpectralTypeO
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeO
SIMBA dspectral type: O
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: OStar
  on property: isClassificationOf
disjoint with: SpectralTypeS
disjoint with: SpectralTypeT

SpectralTypeS
SIMBA dspectral type: S
type: Class
subclass of: SpectralType
subclass of: Restriction
  all values from: SStar
  on property: isClassificationOf
disjoint with: SpectralTypeT

SpectralTypeT
SIMBA dspectral type: T
type: Class
subclass of: SpectralType

SpectroscopicBinary
AD ckeyword: Binaries, spectroscopic
IAU thesaurus alias: spectrum binary stars
IAU thesaurus label: DELTA DELPHINI STARS
IAU thesaurus label: SPECTROSCOPIC BINARY STARS
IAU thesaurus token: DeltaDelphiniStars
IAU thesaurus token: SpectroscopicBinaryStars
MIS cgeneric keywords: binary##binaries##spectroscopic##doubles##double##sb##sbs
MIS cnatural name: Spectroscopic Binary
SIMBA dname: SB
SIMBA dshort code: SB*
VIZIE rkeyword: Binaries:spectroscopic
type: Class
subclass of: DoubleStar
subclass of: VariableStellarObject
disjoint with: CataclysmicVariable

Spectrum
MIS cgeneric keywords: spectrum
MIS cnatural name: Spectrum
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

SpiralArm
IAU thesaurus alias: arms
IAU thesaurus label: SPIRAL ARMS
IAU thesaurus token: SpiralArms
MIS ccomment: Spiral Arm of a galaxy
MIS cgeneric keywords: spiral##arm##arms
MIS cnatural name: Spiral Arm
type: Class
subclass of: PortionOfGalaxy
disjoint with: Halo
disjoint with: OldDisk

SpiralGalaxy
IAU thesaurus label: SPIRAL GALAXIES
IAU thesaurus token: SpiralGalaxies
MIS cgeneric keywords: spiral##gal##galaxy##galaxies##g
MIS cnatural name: Spiral Galaxy
type: Class
subclass of: Galaxy

Star
IAU thesaurus label: HELIUM POOR STARS
IAU thesaurus label: HELIUM RICH STARS
IAU thesaurus label: HYDROGEN DEFICIENT STARS
IAU thesaurus token: HeliumPoorStars
IAU thesaurus token: HeliumRichStars
IAU thesaurus token: HydrogenDeficientStars
MIS cgeneric keywords: star##stars
MIS cnatural name: Star
MIS cregistry alternate single subject: Star
MIS cregistry alternate single subject: Stars
MIS cregistry alternate single subject: stars
type: Class
subclass of: StellarObject
subclass of: Restriction
  max cardinality: 1
  on property: hasComponent
disjoint with: StellarRemnant

Starburst
MIS cgeneric keywords: star##burst##starburst
MIS cnatural name: Starburst Process
type: Class
subclass of: Process

StarburstGalaxy
IAU thesaurus label: STARBURST GALAXIES
IAU thesaurus token: StarburstGalaxies
MIS cgeneric keywords: starburst##gal##galaxy##galaxies##g
MIS cnatural name: Starburst Galaxy
SIMBA dname: StarburstG
SIMBA dshort code: SBG
type: Class
subclass of: Galaxy
subclass of: InfraredSource
subclass of: RadioSource
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MiraCeti
disjoint with: MolecularCloud
disjoint with: OHIREnvelopeTypeStar
disjoint with: Pulsar
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

SteepSpectrumRadioQuasar
MIS cgeneric keywords: steep##spectrum##radio##quasar##qso##quasi##stellar##object##objects
MIS cnatural name: Steep-spectrum Radio Quasar
type: Class
subclass of: HighPowerRadioLoudAGN
disjoint with: FanaroffRileyTypeII
disjoint with: FlatSpectrumRadioQuasar

StellarBlackHole
IAU thesaurus label: BLACK HOLES
IAU thesaurus token: BlackHoles
MIS cgeneric keywords: stellar##black##hole##blackhole##blackholes##holes
MIS cnatural name: Stellar Black Hole
type: Class
subclass of: StellarRemnant
disjoint with: NeutronStar
disjoint with: PlanetaryNebulaCentralStar
disjoint with: WhiteDwarf

StellarObject
IAU thesaurus label: STARS
IAU thesaurus label: STELLAR
IAU thesaurus token: Stars
IAU thesaurus token: Stellar
MIS cgeneric keywords: stellar##object##objects
MIS cnatural name: Stellar Object
NE dcode: *
SIMBA dname: Star
SIMBA dshort code: *
VIZIE rkeyword: Stars
type: Class
subclass of: AstrObject
subclass of: Restriction
  all values from: StellarObject
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: InterStellarMedium
disjoint with: SuperClusterOfGalaxies
disjoint with: SupermassiveBlackHole
disjoint with: Supernova

StellarObjectInAssociation
MIS cgeneric keywords: stellar##object##star##in##association##stars##objects##associations
MIS cnatural name: Stellar Object in Association
SIMBA dname: *inAssoc
SIMBA dshort code: *iA
type: Class
subclass of: EarlyTypeStar
subclass of: StellarObjectInCluster
subclass of: Restriction
  on property: isComponentOf
  some values from: AssociationOfStars

StellarObjectInCluster
MIS ccomment: An individual star located in a star cluster
MIS cgeneric keywords: stellar##object##star##in##cluster
MIS cnatural name: Stellar Object in Cluster
SIMBA dname: *inCl
SIMBA dshort code: *iC
type: Class
subclass of: StellarObject
subclass of: Restriction
  on property: isComponentOf
  some values from: ClusterOfStars

StellarObjectInDoubleStar
MIS ccomment: A star that is part of a double star
MIS cgeneric keywords: stellar##object##star##in##double##stars##objects
MIS cnatural name: Stellar Object in Double Star
SIMBA dname: *in**
SIMBA dshort code: *i*
type: Class
subclass of: StellarObject
subclass of: Restriction
  on property: isComponentOf
  some values from: DoubleStar

StellarObjectInNebula
MIS cgeneric keywords: stellar##object##star##in##nebula##stars##objects
MIS cnatural name: Stellar Object in Nebula
SIMBA dname: *inNeb
SIMBA dshort code: *iN
type: Class
subclass of: StellarObject
subclass of: Restriction
  on property: isComponentOf
  some values from: InterStellarMedium

StellarRemnant
IAU thesaurus label: DEGENERATE DWARF STARS
IAU thesaurus label: DEGENERATE STARS
IAU thesaurus token: DegenerateDwarfStars
IAU thesaurus token: DegenerateStars
MIS cgeneric keywords: stellar##remnant##remnants
MIS cnatural name: Stellar Remnant
type: Class
subclass of: StellarObject
subclass of: Restriction
  max cardinality: 1
  on property: hasComponent
disjoint with: Star
disjoint with: YoungStellarObject

SubDwarfStar
MIS ccomment: Star of LuminosityClass VI
MIS cgeneric keywords: subdwarf##sub##subdwarves
MIS cnatural name: Subdwarf
type: Class
subclass of: Star
subclass of: Restriction
  on property: isClassifiedAs
  some values from: LuminosityClassVI

SubGiantStar
IAU thesaurus label: SUBGIANT STARS
IAU thesaurus token: SubgiantStars
MIS ccomment: Star of Luminosity Class IV
MIS cgeneric keywords: sub##giant##subgiant##giants##subgiants
MIS cnatural name: Subgiant
type: Class
subclass of: Star
subclass of: Restriction
  on property: isClassifiedAs
  some values from: LuminosityClassIV

SubMillimetricRadioSource
AD ckeyword: Millimetric/submm sources
MIS cgeneric keywords: sub##millimetric##submillimetric##radio##source
MIS cnatural name: Sub-millimetric Radio Source
SIMBA dname: Radio(sub-mm)
SIMBA dshort code: smm
type: Class
subclass of: RadioSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: RadioSubMillimetric

SubStellarObject
MIS cgeneric keywords: sub##substellar##object##objects##stellar
MIS cnatural name: Substellar Object
SIMBA dname: Sub-stellar
SIMBA dshort code: su*
type: Class
subclass of: AstrObject
disjoint with: SupermassiveBlackHole
disjoint with: Supernova
disjoint with: Unknown
disjoint with: VariableStellarObject

SuperClusterOfGalaxies
IAU thesaurus label: SUPERCLUSTERS
IAU thesaurus token: Superclusters
MIS cgeneric keywords: super##cluster##supercluster##galaxies##galaxy##superclusters##clusters##g##gal
MIS cnatural name: Super Cluster of Galaxies
SIMBA dname: SuperClG
SIMBA dshort code: SCG
type: Class
subclass of: CompoundObject
subclass of: Restriction
  all values from: ClusterOfGalaxies
  on property: hasComponent
disjoint with: AGN
disjoint with: AssociationOfStars
disjoint with: ClusterOfGalaxies
disjoint with: ClusterOfStars
disjoint with: GalaxiesGroup
disjoint with: Galaxy
disjoint with: GalaxyPair
disjoint with: MultipleStar
disjoint with: PlanetaryNebula
disjoint with: StellarObject

SuperGiantStar
AD ckeyword: Stars, supergiant
IAU thesaurus label: HYPERGIANT STARS
IAU thesaurus token: HypergiantStars
MIS ccomment: Star of Luminosity Class I
MIS cgeneric keywords: super##giant##supergiant##giants##supergiants
MIS cnatural name: Supergiant
type: Class
subclass of: Star
subclass of: Restriction
  on property: isClassifiedAs
  some values from: LuminosityClassI

SuperNovaExplosionCoreCollapse
MIS cgeneric keywords: supernova##explosion##core##collapse##process##processes
MIS cnatural name: Core Collapse Supernova Explosion
type: Class
subclass of: SupernovaExplosion
disjoint with: SuperNovaExplosionThermonuclear

SuperNovaExplosionThermonuclear
MIS cgeneric keywords: supernova##explosion##thermonuclear##thermo##nuclear##process##processes
MIS cnatural name: Thermonuclear Supernova Explosion
type: Class
subclass of: SupernovaExplosion
disjoint with: SuperNovaExplosionCoreCollapse

SuperNovaTypeI
GCV scode: SNI
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##typei##type1##type##1##i
MIS cnatural name: Supernova type I
type: Class
subclass of: Supernova
subclass of: Class
  complement of: Restriction
    on property: hasAbsorptionSpectralLine
    some values from: AtomicElementH
disjoint with: SuperNovaTypeII

SuperNovaTypeII
GCV scode: SNII
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##supernovae##super##nova##novae##sn##typeii##type2##type##2##ii
MIS cnatural name: Supernova type II
type: Class
subclass of: Supernova
subclass of: Restriction
  all values from: HighMassStar
  on property: hasProgenitor
subclass of: Restriction
  on property: hasAbsorptionSpectralLine
  some values from: AtomicElementH
disjoint with: SuperNovaTypeI

SuperNovaTypeIILP
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##typeiilp##type2lp##type##2##iilpb##typeii##type2
MIS cnatural name: Supernova type IILP
type: Class
subclass of: SuperNovaTypeII
subclass of: Class
  complement of: SuperNovaTypeIIb
disjoint with: SuperNovaTypeIIb

SuperNovaTypeIIb
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##typeiib##type2b##type##2##ii##b##typeii##type2
MIS cnatural name: Supernova type IIb
type: Class
subclass of: SuperNovaTypeII
subclass of: Restriction
  on property: hasAbsorptionSpectralLine
  some values from: AtomicElementHe
disjoint with: SuperNovaTypeIILP

SuperNovaTypeIa
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##typeia##type1a##type##1a##ia##a##1##i
MIS cnatural name: Supernova type Ia
type: Class
subclass of: SuperNovaTypeI
subclass of: Restriction
  all values from: WhiteDwarf
  on property: hasProgenitor
subclass of: Restriction
  on property: hasAbsorptionSpectralLine
  some values from: AtomicElementSi
disjoint with: SuperNovaTypeIb
disjoint with: SuperNovaTypeIc

SuperNovaTypeIb
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##typeia##type1b##type##1b##ib##b##1##i
MIS cnatural name: Supernova type Ib
type: Class
subclass of: SuperNovaTypeI
subclass of: Restriction
  all values from: WolfRayetStar
  on property: hasProgenitor
subclass of: Class
  complement of: Restriction
    on property: hasAbsorptionSpectralLine
    some values from: AtomicElementSi
subclass of: Restriction
  on property: hasAbsorptionSpectralLine
  some values from: AtomicElementHe
disjoint with: SuperNovaTypeIa
disjoint with: SuperNovaTypeIc

SuperNovaTypeIc
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn##typeic##type1c##type##1c##ic##c##1##i
MIS cnatural name: Supernova type Ic
type: Class
subclass of: SuperNovaTypeI
subclass of: Class
  complement of: Restriction
    on property: hasAbsorptionSpectralLine
    some values from: AtomicElementHe
subclass of: Class
  complement of: Restriction
    on property: hasAbsorptionSpectralLine
    some values from: AtomicElementSi
disjoint with: SuperNovaTypeIa
disjoint with: SuperNovaTypeIb

SupermassiveBlackHole
MIS cgeneric keywords: super##massive##supermassive##black##hole##blackhole##holes#blackholes##smbh
MIS cnatural name: Supermassive Black Hole
type: Class
subclass of: AstrObject
disjoint with: Supernova
disjoint with: Unknown
disjoint with: VariableStellarObject

Supernova
AD ckeyword: Supernovae
GCV scode: SN
IAU thesaurus label: SUPERNOVAS
IAU thesaurus token: Supernovas
MIS cgeneric keywords: supernova##supernovae##super##nova##novae##sn
MIS cnatural name: supernova
MIS cregistry alternate single subject: Supernova
MIS cregistry alternate single subject: supernova
NE dcode: SN
SIMBA dname: SN
SIMBA dshort code: SN*
VIZIE rkeyword: SuperNovae
type: Class
subclass of: AstrObject
subclass of: Restriction
  all values from: Class
    union of: HighMassStar
    union of: WhiteDwarf
    union of: WolfRayetStar
  on property: hasProgenitor
disjoint with: StellarObject
disjoint with: Unknown

SupernovaExplosion
MIS cgeneric keywords: supernova##explosion##processes##process
MIS cnatural name: Supernova Explosion
type: Class
subclass of: Explosion
subclass of: Restriction
  all values from: Supernova
  on property: isProcessOf

SupernovaRemnantShell
AD ckeyword: Supernova remnants
IAU thesaurus label: SUPERNOVA REMNANTS
IAU thesaurus token: SupernovaRemnants
MIS cgeneric keywords: supernova##shell##remnant##shells##remnants##snr##supernovae##snrs
MIS cnatural name: Supernova Remnant Shell
MIS cregistry alternate single subject: SNR
NE dcode: SNR
SIMBA dname: SNR
SIMBA dshort code: SNR
VIZIE rkeyword: SuperNovae_Remnants
type: Class
subclass of: EmissionNebula
subclass of: RadioSource
subclass of: XRaySource
subclass of: Restriction
  all values from: Shockwave
  on property: isIonizedBy
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MolecularCloud
disjoint with: PlanetaryNebulaShell
disjoint with: Pulsar
disjoint with: RSCanumVenaticorum
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: TTauri
disjoint with: XRayBinary

SurfaceBrightness
IAU thesaurus label: SURFACE BRIGHTNESS
IAU thesaurus token: SurfaceBrightness
MIS ccomment: for extended objects
MIS cgeneric keywords: surface##brightness
MIS cnatural name: Surface Brightness
type: Class
subclass of: Measurement
subclass of: Restriction
  all values from: Class
    union of: InterStellarMedium
    union of: Class
      intersection of: CompoundObject
      intersection of: Class
        complement of: MultipleStar
  on property: isMeasuredFor
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: Temperature
disjoint with: VariabilityTimeScale
disjoint with: Velocity

SymbioticStar
GCV scode: ZAND
IAU thesaurus alias: symbiotic novas
IAU thesaurus label: SYMBIOTIC STARS
IAU thesaurus token: SymbioticStars
MIS cdescription: 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.
MIS cgeneric keywords: symbiotic##star##stars
MIS cnatural name: Symbiotic Star
SIMBA dname: Symbiotic*
SIMBA dshort code: Sy*
type: Class
subclass of: DoubleStar
subclass of: VariableStellarObject
subclass of: Restriction
  all values from: Class
    union of: EarlyTypeStar
    union of: Class
      intersection of: LateTypeStar
      intersection of: Restriction
        on property: hasPortion
        some values from: Envelope
  on property: hasComponent

SynchrotronEmission
MIS cgeneric keywords: emission synchrotron
MIS cgeneric keywords: synchrotron##emission##process##processes
MIS cnatural name: Synchrotron Emission
type: Class
subclass of: Emission

TTauri
GCV scode: INT,IT
IAU thesaurus alias: yy orionis stars
IAU thesaurus label: T TAURI STARS
IAU thesaurus token: TTauriStars
MIS ccomment: near IR emission, age around 10^6years
MIS cgeneric keywords: t##tauri##star##tau##ttauri##stars
MIS cnatural name: T Tauri Star
SIMBA dshort code: TT*
type: Class
subclass of: NearInfraredSource
subclass of: OrionVariableStar
subclass of: RadioSource
subclass of: RotationallyVariableStellarObject
subclass of: XRaySource
disjoint with: Alpha2CanumVenaticorum
disjoint with: EllipsoidalVariableStar
disjoint with: HIIRegion
disjoint with: HIRegion
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: MolecularCloud
disjoint with: Pulsar
disjoint with: RSCanumVenaticorum
disjoint with: RadioGalaxy
disjoint with: RadioLoudAGN
disjoint with: StarburstGalaxy
disjoint with: SupernovaRemnantShell
disjoint with: XRayBinary

Temperature
IAU thesaurus label: TEMPERATURE
IAU thesaurus token: Temperature
MIS cnatural name: temperature
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: VariabilityTimeScale
disjoint with: Velocity

UltraViolet
AD ckeyword: Spectra, ultraviolet
AD ckeyword: Ultraviolet
IAU thesaurus alias: ultraviolet light
IAU thesaurus alias: uv
IAU thesaurus label: ULTRAVIOLET
IAU thesaurus label: ULTRAVIOLET RADIATION
IAU thesaurus token: Ultraviolet
IAU thesaurus token: UltravioletRadiation
MIS cgeneric keywords: uv##ultraviolet##ultra##violet
MIS cnatural name: Ultraviolet
VIZIE rkeyword: UV
type: Class
subclass of: EMSpectrumRange
disjoint with: GammaRays
disjoint with: Infrared
disjoint with: Optical
disjoint with: Radio
disjoint with: XRays

UltraVioletSource
IAU thesaurus alias: ultraviolet objects
IAU thesaurus label: ULTRAVIOLET SOURCES
IAU thesaurus token: UltravioletSources
MIS cgeneric keywords: uv##ultraviolet##ultra##violet##source
MIS cnatural name: UV Source
MIS cregistry alternate single subject: UV
MIS cregistry alternate single subject: Ultraviolet
SIMBA dname: UV
SIMBA dshort code: UV
type: Class
subclass of: EMSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: UltraViolet

Unknown
MIS cgeneric keywords: unknown
MIS cnatural name: Object of unknown nature
SIMBA dname: Unknown
SIMBA dshort code: ?
type: Class
subclass of: AstrObject
disjoint with: CompoundObject
disjoint with: EMSource
disjoint with: InterStellarMedium
disjoint with: SubStellarObject
disjoint with: SupermassiveBlackHole
disjoint with: Supernova

VIZIERkeyword
MIS cdescription: VizieR keyword corresponding to an item of the ontology
type: AnnotationProperty
type: DatatypeProperty
range: string

VariabilityTimeScale
MIS cgeneric keywords: time##scale##timescale##variability
MIS cnatural name: Variability Time Scale
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: Velocity

VariableStellarObject
AD ckeyword: Stars, variable
IAU thesaurus label: DOUBLE MODE VARIABLE STARS
IAU thesaurus label: VARIABLE STARS
IAU thesaurus token: DoubleModeVariableStars
IAU thesaurus token: VariableStars
MIS cgeneric keywords: variable##star##stellar##object##objects##variability##stars
MIS cregistry alternate single subject: Variable Star
MIS cregistry alternate single subject: Variable stars
NE dcode: V*
SIMBA dname: V*
SIMBA dshort code: V*
VIZIE rkeyword: Stars:variable
type: Class
subclass of: StellarObject
subclass of: Restriction
  on property: hasProcess
  some values from: Class
    union of: Eclipse
    union of: Explosion
    union of: Pulsation
    union of: Rotation

Velocity
AD ckeyword: Space velocities
IAU thesaurus label: VELOCITY
IAU thesaurus token: Velocity
MIS cgeneric keywords: velocity
MIS cnatural name: Velocity
VIZIE rkeyword: Velocities
type: Class
subclass of: Measurement
disjoint with: AbsoluteMagnitude
disjoint with: Abundances
disjoint with: Age
disjoint with: Continuum
disjoint with: Distance
disjoint with: EquivalentWidth
disjoint with: Flux
disjoint with: FluxAmplitudeVariation
disjoint with: FluxRatio
disjoint with: InclinationWrtLOS
disjoint with: LightCurve
disjoint with: LineWidth
disjoint with: LumX
disjoint with: MagneticField
disjoint with: Mass
disjoint with: Parallax
disjoint with: Period
disjoint with: Polarization
disjoint with: PowerRadio
disjoint with: SpectralIndex
disjoint with: Spectrum
disjoint with: SurfaceBrightness
disjoint with: Temperature
disjoint with: VariabilityTimeScale

VelocityDispersion
AD ckeyword: Velocity dispersion
IAU thesaurus label: VELOCITY DISPERSION
IAU thesaurus token: VelocityDispersion
type: Class
subclass of: Velocity

Velocity i
MIS ccomment: default instance
type: Velocity

WVirginisStar
GCV scode: CW
IAU thesaurus label: W VIRGINIS STARS
IAU thesaurus token: WVirginisStars
MIS ccomment: Variable Star of W Vir type
MIS cdescription: 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.
MIS cgeneric keywords: w##virginis##wvirginis##type##variable##star##stars##variables
MIS cnatural name: W Virginis Variable Star
SIMBA dname: PulsV*WVir
SIMBA dshort code: WV*
type: Class
subclass of: PulsatingStellarObject
disjoint with: BetaCephei
disjoint with: Cepheid
disjoint with: DeltaScuti
disjoint with: GammaDoradus
disjoint with: LongPeriodVariable
disjoint with: PulsatingAlpha2CVn
disjoint with: PulsatingWhiteDwarf
disjoint with: RCoronaeBorealis
disjoint with: RRLyrae
disjoint with: RVTauri

WeakLineTTauri
MIS cdescription: 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.
MIS cgeneric keywords: wtts##weak##line##t##tau##tauri##star##stars##ttauri##weakline
MIS cnatural name: Weak-line T Tauri
type: Class
subclass of: TTauri
disjoint with: ClassicalTTauri
disjoint with: HerbigHaro

WhiteDwarf
AD ckeyword: Stars, white dwarf
IAU thesaurus alias: da stars
IAU thesaurus label: WHITE DWARF STARS
IAU thesaurus token: WhiteDwarfStars
MIS cgeneric keywords: white##dwarf##wd
MIS cnatural name: White Dwarf
MIS cregistry alternate single subject: White Dwarf
MIS cregistry alternate single subject: White dwarfs
NE dcode: WD
SIMBA dname: WD*
SIMBA dshort code: WD*
VIZIE rkeyword: Stars:white_dwarf
type: Class
subclass of: StellarRemnant
disjoint with: NeutronStar
disjoint with: PlanetaryNebulaCentralStar
disjoint with: StellarBlackHole

WolfRayetStar
AD ckeyword: Stars, Wolf-Rayet
IAU thesaurus alias: wc stars
IAU thesaurus alias: wcn stars
IAU thesaurus alias: wn stars
IAU thesaurus alias: wr stars
IAU thesaurus label: WOLF RAYET STARS
IAU thesaurus token: WolfRayetStars
MIS cgeneric keywords: wolf##rayet##wolfrayet##star##wr
MIS cnatural name: Wolf-Rayet Star
NE dcode: WR
SIMBA dname: WR*
SIMBA dshort code: WR*
VIZIE rkeyword: Stars:WR
type: Class
subclass of: EmissionLineStar
disjoint with: BeStar

XRayBinary
AD ckeyword: Binaries, X-ray
GCV scode: X
IAU thesaurus label: X RAY BINARY STARS
IAU thesaurus token: XRayBinaryStars
MIS cdescription: 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.
MIS cgeneric keywords: x##ray##xray##binary##binaries##stars##xb##xrb
MIS cnatural name: X-ray Binary
MIS cregistry alternate single subject: XRB
SIMBA dname: XB
SIMBA dshort code: XB*
type: Class
subclass of: DoubleStar
subclass of: VariableStellarObject
subclass of: XRaySource
subclass of: Restriction
  all values from: Class
    union of: StellarObject
    union of: StellarRemnant
  on property: hasComponent
disjoint with: CataclysmicVariable
disjoint with: LowPowerRadioQuietAGN Seyfert
disjoint with: Pulsar
disjoint with: RSCanumVenaticorum
disjoint with: SupernovaRemnantShell
disjoint with: TTauri

XRaySource
AD ckeyword: X-ray sources
IAU thesaurus label: X RAY SOURCES
IAU thesaurus token: XRaySources
MIS cnatural name: X-ray Source
MIS cregistry alternate single subject: x-ray
MIS cregistry alternate single subject: xray
NE dcode: XRayS
SIMBA dname: X
SIMBA dshort code: X
type: Class
subclass of: EMSource
subclass of: Restriction
  on property: hasEmissionIn
  some values from: XRays

XRays
IAU thesaurus alias: X ray radiation
IAU thesaurus label: X RAYS
IAU thesaurus token: XRays
MIS cgeneric keywords: x##ray##xray##rays##xrays
MIS cnatural name: X-Rays
VIZIE rkeyword: X-Ray
type: Class
subclass of: EMSpectrumRange
disjoint with: GammaRays
disjoint with: Infrared
disjoint with: Optical
disjoint with: Radio
disjoint with: UltraViolet

YoungStellarObject
AD ckeyword: YSOs
IAU thesaurus label: YOUNG STARS
IAU thesaurus token: YoungStars
MIS cdescription: 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)
MIS cgeneric keywords: yso##young##stellar##object##objects
MIS cnatural name: YSO
SIMBA dname: YSO
SIMBA dshort code: Y*O
VIZIE rkeyword: YSOs
type: Class
subclass of: StellarObject
disjoint with: StellarRemnant

hasAbsorptionSpectralLine
MIS cnatural name: features absorption spectral line(s) for
type: ObjectProperty
domain: AstrObject
range: AtomicElement

hasAbundanceOf
MIS cnatural name: features an abundance of
type: ObjectProperty
domain: AstrObject
range: AtomicElement

hasComponent
MIS ccomment: 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)
MIS cnatural name: has among its (direct) components
type: ObjectProperty
domain: CompoundObject
range: AstrObject

hasEmissionIn
MIS cnatural name: features a noticeable emission in
type: ObjectProperty
domain: Class
  union of: AstrObject
  union of: AstroPortion
range: EMSpectrumRange

hasEmissionSpectralLineFor
MIS cnatural name: features emission spectral line(s) for
type: ObjectProperty
domain: AstrObject
range: AtomicElement

hasMeasurement
MIS ccomment: Indicates that the DOMAIN AstrObject has the RANGE Measurement among its (observational) measurements
MIS cnatural name: has among its measurements
type: ObjectProperty
domain: AstrObject
range: Measurement

hasMorphology
MIS cnatural name: has among its morphological features
type: ObjectProperty
domain: AstrObject
range: Morphology
inverse of: isMorphologyOf

hasPortion
MIS ccomment: Indicates that the RANGE AstroPortion can be found whithin the DOMAIN CompoundObject or AstroPortion
MIS cnatural name: Indicates that the RANGE AstroPortion can be found whithin the DOMAIN CompoundObject or AstroPortion
type: ObjectProperty
domain: Class
  union of: AstrObject
  union of: AstroPortion
range: AstroPortion

hasProcess
MIS ccomment: Indicates that an astronomical object is the location of a Process/has an attached process
MIS cnatural name: has among its processes
type: ObjectProperty
domain: AstrObject
range: Process
inverse of: isProcessOf

hasProgenitor
MIS ccomment: Indicates the Progenitor of a Supernova
MIS cnatural name: has for progenitor
type: ObjectProperty
domain: Supernova
range: Class
  union of: HighMassStar
  union of: WhiteDwarf
  union of: WolfRayetStar

isClassificationOf
MIS cnatural name: is class of
type: ObjectProperty
domain: ClassificationCategory
range: AstrObject
inverse of: isClassifiedAs

isClassifiedAs
MIS cnatural name: is a member of the class:
type: ObjectProperty
domain: AstrObject
range: ClassificationCategory

isComponentOf
MIS ccomment: Indicates that the DOMAIN AstrObject is a direct physical component of the RANGE CompositeObject (not a component of a component of the RANGE CompositeObject)
MIS cnatural name: is component of
type: ObjectProperty
domain: AstrObject
range: CompoundObject
inverse of: hasComponent

isIonizedBy
MIS ccomment: Indicates what ionizes the gas of a given ISM
MIS cnatural name: is ionized by
type: ObjectProperty
domain: InterStellarMedium
range: Class
  union of: EarlyTypeStar
  union of: PlanetaryNebulaCentralStar
  union of: Shockwave

isMeasuredFor
MIS cnatural name: is measured for
type: ObjectProperty
domain: Measurement
range: AstrObject
inverse of: hasMeasurement

isMorphologyOf
MIS cnatural name: is morphology of
type: ObjectProperty
domain: Morphology
range: AstrObject

isPortionOf
MIS cnatural name: is portion of
type: ObjectProperty
domain: AstroPortion
range: Class
  union of: AstrObject
  union of: AstroPortion
inverse of: hasPortion

Thing
MIS ccomment: TOP concept
MIS cgeneric keywords: thing##top##anything
MIS cnatural name: TOP
type: Class