Fast solar hard X-ray bursts and large-scale coronal structures

Abstract

view Abstract Citations (9) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Fast solar hard X-ray bursts and large-scale coronal structures Simnett, G. M. Abstract The conditions at the sun at the times corresponding to a selected set of 22 fast impulsive hard X-ray bursts reported by Crannell et al. (1978) are examined. It is suggested that one of the bursts must arise from a precipitating beam of subrelativistic electrons; the source of the electrons is postulated to be in a region very remote from the X-ray site on the basis of type III and other radio data. The connection is via a coronal magnetic loop extending to approximately 3 solar radii above the photosphere. The energy in the electron beam is estimated at 3 x 10 to the 27th ergs. Intense soft X-ray and/or microwave radio storms at times corresponding to many of the impulsive X-ray bursts lead to the conclusion that 14, and possibly 18, of the 22 bursts could have the same interpretation. The energy in such an electron beam could be important when considering the trigger phase of some flares. Publication: The Astrophysical Journal Pub Date: April 1982 DOI: 10.1086/159871 Bibcode: 1982ApJ...255..721S Keywords: Solar Corona; Solar X-Rays; Type 3 Bursts; Coronal Loops; Electron Acceleration; Electron Precipitation; Energetic Particles; Noise Storms; Relativistic Electron Beams; Solar Flares; Solar Storms; X Ray Spectra; Solar Physics full text sources ADS |