Gamma-ray bursts as a result of an interaction of a supernova shock with the star-companion in a binary system |
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Authors: | Ya N Istomin F L Soloviev |
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Institution: | 1.Lebedev Physical Institute,Russian Academy of Sciences,Moscow,Russia;2.Moscow Institute of Physics and Technology (State University),Dolgoprudny, Moscow region,Russia |
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Abstract: | 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, Δθ ≃ 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. |
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Keywords: | |
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