Affordable Access

Publisher Website

Statistical properties of solar gamma-ray flares

Authors
Journal
Chinese Astronomy and Astrophysics
0275-1062
Publisher
Elsevier
Publication Date
Volume
15
Issue
3
Identifiers
DOI: 10.1016/0275-1062(91)90027-u
Keywords
  • The Sun—Gamma-Ray Bursts—Flares

Abstract

Abstract We studied the 120 solar gamma-ray events observed by the gamma-ray spectrometer (GRS) on board the SMM satellite between 1980 March and 1983 June with particular emphasis on the basic properties of the active regions producing such events. Combined with observed data of Type-II and Type-IV metre wave radio bursts, we further discussed the physical mechanisms in solar flares. Our results show 1) that gamma-ray flares generally occur in morphologically and magnetically complicated regions; 2) that flares with gamma-ray lines (nuclear lines) are closely related to Type-II and Type-IV bursts; 3) that there are regions with multiple gamma-ray flares. These have particularly complicated structures, the δ-type magnetic configuration without exception and many other interesting features which should provide a clear observational basis for building a reasonable flare model; 4) that a deep study of the electric current in the active region and plasma instabilities involving the current is important for understanding the basic physical process of flares; and 6) that different flares may have different particle acceleration mechanisms at work.

There are no comments yet on this publication. Be the first to share your thoughts.