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Gamma-Ray Precursors of Solar Flares

Published online by Cambridge University Press:  12 April 2016

E. Rieger
E. Rieger*
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, 8046 Garching, Germany

Abstract

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Bursts have been observed by the gamma-ray spectrometer on SMM at medium- and high-energy gamma-rays that precede the flare maximum. The negligible contribution of nuclear lines in the spectra of these events and their impulsive appearance suggests that they are hard-electron-dominated events superposed on the flares. Spatial resolution at gamma-ray energies will be necessary to decide whether this kind of bursts is cospatial with the flares or whether they occur in the flares’ vicinity.

Subject headings: Sun: flares — Sun: X-rays, gamma rays

Type
Solar Flares
Information
International Astronomical Union Colloquium , Volume 142: Particle Acceleration Phenomena in Astrophysical Plasmas , 1994 , pp. 645 - 648
Copyright
Copyright © The American Astronomical Society 1994

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