Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..560r&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, May-June 1976, p. 560-567. In Russian.
Astronomy and Astrophysics
Astrophysics
Cosmic Plasma, Magnetic Field Configurations, Magnetohydrodynamic Waves, Shock Fronts, Synchrotron Radiation, Angular Distribution, Chromosphere, Solar Electrons, Supernovae, Type 2 Bursts
Scientific paper
Synchrotron emission from magnetohydrodynamic shock fronts propagating in an astrophysical plasma is considered. The radiation frequency spectrum and angular distribution are calculated. Radiation properties related to the magnetic-field discontinuity, such as the angular-distribution dependence on the front's propagation direction, spectral bands due to radiation from nonrelativistic electrons, and the change in the nature of the low-frequency 'pile-up' in the radiation spectrum of cosmic electrons, are analyzed in detail. The results obtained are applied to the radiation of electrons which are accelerated in strong-compression shock fronts propagating in supernova shells and the solar chromosphere. In the latter case, it is shown that the electron radiation due to the shock front explains the basic features of type II radio bursts.
Rumiantsev A. A.
Zotov Alexander
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