Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l.107y&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. L107-L110.
Astronomy and Astrophysics
Astronomy
16
Gamma Ray Astronomy, Light Curve, Solar Flares, Solar Spectra, Solar Spectrometers, Broadband, Gamma Ray Spectra, Japanese Spacecraft
Scientific paper
Gamma-ray flares were observed with the Yohkoh Wide-Band Spectrometer (WBS) on 1991 October 27, and 1991 December 3. The October 27 flare (X6.1/3B) shows a strong gamma-ray line emission and different light curves between hard X-rays and gamma-ray lines, while the December 3 flare (X2.0/2B) shows a double power-law spectrum and similar light curves over a wide energy range. These results imply that the electron-to-proton ratio in flares varies greatly from flare to flare. The characteristics of two gamma-ray flares are described and the particle acceleration process is discussed on the basis of the light curve and energy spectrum.
Morimoto Kouji
Ohki Kenichiro
Suga Kazuharu
Takai Yukio
Yoshimori Masato
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