Hard X-ray and radio investigations prior to or during the impulsive phase of solar flares

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Adv. Space Res.; (United States)

DOI:https://doi.org/10.1016/0273-1177(84)90177-7· OSTI ID:5672007

Pick, M; Raoult, A

A comparative study of radiation in the different spectral ranges, including X-ray and radio observations, can establish constraints for the electron acceleration/injection mechanisms. Such investigation, focusing on the activity prior to and during the impulsive phase of solar flares, is presented. Observations provide evidence for electron acceleration prior to the impulsive phase. The association between type-III groups and hard X-ray bursts becomes more apparent with increasing starting frequency of the former observed during the impulsive phase. It is shown that pure type-III burst groups, when they are associated with X-rays, do not correspond to an intense X-ray emission. In contrast, the type-III/V events can be associated with strong X-ray emission. Radioheliograph observations place constraints on the geometry of the injection/acceleration site. 12 references.

• Research Organization: Paris Observatoire, France
• OSTI ID: 5672007
• Journal Information: Adv. Space Res.; (United States), Journal Name: Adv. Space Res.; (United States) Vol. 4; ISSN ASRSD
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FLUX DENSITY
HARD X RADIATION
IONIZING RADIATIONS
LEPTONS
MAGNETIC FIELDS
RADIANT FLUX DENSITY
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR ELECTRONS
SOLAR FLARES
SOLAR PARTICLES
SOLAR RADIATION
SOLAR RADIO BURSTS
STELLAR RADIATION
X RADIATION