Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979acasn..20...73z&link_type=abstract
Acta Astronomica Sinica, vol. 20, Mar. 1979, p. 73-81. In Chinese, with abstract in English.
Astronomy and Astrophysics
Astronomy
2
Annihilation Reactions, Astronomical Models, Cosmic X Rays, Gamma Rays, Energy Dissipation, Kinetic Energy, Magnetic Stars, Neutral Sheets, Reaction Kinetics, Stellar Radiation, Synchrotron Radiation, White Dwarf Stars
Scientific paper
This paper proposes a model to explain the energy supply of cosmic gamma-ray bursts by means of magnetic-energy annihilation in neutral sheets formed in local active regions on magnetic white dwarfs. According to this model the instability process in the plasma consists of two phases, namely, the thermal explosive phase and the steady annihilation phase. The magnetic energy stored in the local source is efficiently converted into kinetic energy and cosmic dissipation energy of the plasma at a rate that is consistent with the observations. With a rapid increase in anomalous resistivity a plasma turbulence field is set up which can immediately be coupled with fast electrons in the Maxwellian high-energy tail. Then the relativistic electrons are produced within a time as short as 10 to the -8th sec, which does not conflict with the fast ascent of a brief 'spike' of gamma rays. The results of calculations indicate also that the gamma-rays can be emitted by accelerated electrons moving around the magnetic field through synchrotron radiation.
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