Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009arep...53..904i&link_type=abstract
Astronomy Reports, Volume 53, Issue 10, pp.904-914
Astronomy and Astrophysics
Astronomy
1
Gamma-Ray Sources, Gamma-Ray Bursts, Supernovae
Scientific paper
Interaction of a fast shock wave generated during a supernova explosion with a magnetized star-companion of the supernova precursor produces a current sheet. We consider an evolution of this current sheet and show that a singularity (shock) is formed in finite time within the ideal magnetohydrodynamics framework. Charged particles (electrons) are accelerated in the vicinity of the singularity, and their distribution function has a plateau up to the energies of the order of 104 mc 2. These fast particles radiate in the γ-range in the strong magnetic field of the current sheet ( B ≃ 106 G). Radiation is concentrated within a narrow angle around the current sheet, Δ θ ≃ 3 × 10-4, and its spectrum has the maximum at several hundreds of keV. Presented calculations confirm the model of cosmological GRBs proposed earlier by Istomin & Komberg.
Istomin Ya N.
Soloviev L. F.
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