Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jpsj...55.3683y&link_type=abstract
Physical Society of Japan, Journal (ISSN 0031-9015), vol. 55, Oct. 1986, p. 3683-3688.
Astronomy and Astrophysics
Astronomy
3
Emission Spectra, Gamma Ray Astronomy, Solar Flares, Solar Limb, Solar X-Rays, Temporal Distribution, Nuclear Reactions, Particle Acceleration, Spaceborne Astronomy, Spectrum Analysis
Scientific paper
The Hinotori satellite observed an unusual time history of hard X-ray and gamma-ray emissions from a limb flare on Apr. 4, 1981. The detailed comparison of the time history reveals that the gamma-ray emission precedes the hard X-ray emission by about 10 s. The following three possibilities are suggested to explain the unusual time history: (1) the ion acceleration precedes the electron acceleration; (2) the ions and electrons are simultaneously accelerated, but the nuclear reactions responsible for gamma-ray emission precede the electron bremsstrahlung responsible for hard x-ray emission; and (3) the gamma-rays and hard X-rays are simultaneously emitted, but the hard X-rays are strongly attenuated from the limb effect.
Okudaira Kiyoaki
Yanagimachi Tomoki
Yoshimori Masato
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