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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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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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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

    Ya. N. Istomin

  2. Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow region, Russia

    F. L. Soloviev

Authors
  1. Ya. N. Istomin
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  2. F. L. Soloviev
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Additional information

Original Russian Text © Ya.N. Istomin, F.L. Soloviev, 2009, published in Astronomicheskiĭ Zhurnal, 2009, Vol. 86, No. 10, pp. 974–984.

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Istomin, Y.N., Soloviev, F.L. Gamma-ray bursts as a result of an interaction of a supernova shock with the star-companion in a binary system. Astron. Rep. 53, 904–914 (2009). https://doi.org/10.1134/S1063772909100035

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  • DOI: https://doi.org/10.1134/S1063772909100035

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