Abstract
We present the results of population syntheses for binary stars carried out using the “Scenario Machine” code with the aim of analyzing events that may result in long gamma-ray bursts. We show that the observed distribution of morphological types of the host galaxies of long gamma-ray bursts can be explained in a model in which long gamma-ray bursts result from the core collapse of massive Wolf-Rayet stars in close binaries. The dependence of the burst rate on galaxy type is associated with an increase in the rate of stellar-wind mass-loss with increasing stellar metallicity. The separation of binary components at the end of their evolution increases with the stellar-wind rate, resulting in a reduction of the number of binaries that produce gamma-bursts.
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Original Russian Text © A.I. Bogomazov, V.M. Lipunov, A.V. Tutukov, 2008, published in Astronomicheskiĭ Zhurnal, 2008, Vol. 85, No. 6, pp. 520–523.
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Bogomazov, A.I., Lipunov, V.M. & Tutukov, A.V. Long gamma-ray bursts and the morphology of their host galaxies. Astron. Rep. 52, 463–466 (2008). https://doi.org/10.1134/S1063772908060036
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DOI: https://doi.org/10.1134/S1063772908060036