Unusual Time History of Hard X-Ray and Gamma-Ray Emissions from the 1981 April 4 Flare

概要

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The Hinotori satellite observed an unusual time history of hard X-ray and gamma-ray emissions from a limb flare on 4 April, 1981. The detailed comparison of the timehistory reveals that the gamma-ray emission precedes the hard X-ray emission byabout 10 s. Following three possibilities are suggested to explain the unusual timehistory: (l) The ion acceleration precedes the electron acceleration, (2) the ions andelectrons are simultaneously accelerated, but the nuclear reactions responsible forgamma-ray emission precede tlte electron bremsstrahlung responsible for hard X-rayemission, and (3) the gamma-rays and hard X-rays are simultaneously emitted, butthe hard X-rays are strongly attenuated from the limb effect.
社団法人日本物理学会の論文
1986-10-15