Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..177n&link_type=abstract
(NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988) Astrophysical Jou
Astronomy and Astrophysics
Astrophysics
17
Shock Waves, Solar Flares, Type 2 Bursts, Circular Polarization, Emission Spectra, Gamma Ray Bursts, Particle Acceleration, Solar Corona, Solar Electrons
Scientific paper
An unusually high speed (10,000 km/s) type II radio burst was observed in the rising phase of a strong gamma-ray burst which started at 2359:58.7 UT on April 24, 1984. The high-speed type II burst decelerated suddenly to 3600 km/s and, after that, activated an advancing front moving type IV radio burst and an H-alpha Moreton wave. Comparisons of the type II burst with X-ray and gamma-ray emissions suggest that shock acceleration did not play a major role in acceleration of high-energy electrons and ions which were responsible for production of the strong X-ray and gamma-ray emissions in the impulsive phase of the April 24 flare.
Enome Shinzo
Kawashima Shuichi
Nakajima Hiroaki
Rieger Erich
Shinohara Nobuo
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