The frequency ratio and time delay of fundamental and harmonic components in solar radio bursts by X. Chen et al

2023-02-28 196 views

Solar radio bursts generated through the plasma emission mechanism produce radiation near the local plasma frequency (fundamental emission, hereafter, F) and double the plasma frequency (harmonic, hereafter, H). While the theoretical ratio of these two frequencies is close to 2, simultaneous observations give ratios ranging from 1.6 to 2, suggesting either a ratio different from 2, a delay of the F emission, or both. Observations suggest that a delayed F […]

The Radial Variation of the Solar Wind Turbulence Spectra near the Kinetic Break Scale from Parker Solar Probe Measurements, by Lotz et al

2023-02-14 104 views

The Parker Solar Probe (PSP) has enabled unprecedented opportunity to study the plasma and magnetic field properties of the solar wind from near the Earth (~1 au radial distance r) to very close to the sun (r < 0.1 au). We are interested in the turbulence characteristics of the solar wind and how it evolves from close to the sun to far away. This information is crucial to the understanding […]

Special issue “Recent progress in the physics of the Sun and heliosphere”, by E. Kontar and I. Ballai

2023-02-10 197 views

The present Special Issue published in Advances of Space Research contains a collection of peer-reviewed contributions that builds on the recent observational and theoretical advances, surveying the existing knowledge in reconnecting magnetic fields, flares and plasma heating, the generation, evolutions and dynamics of small-scale solar jets, dynamics in various layers of the solar atmosphere, recent advances in coronal spectroscopy and the evolution of the solar wind inspired by European Solar […]