Distribution of compact object mergers around galaxies |
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| Authors: | Tomasz Bulik Krzysztof Belczy&#;ski Wojciech Zbijewski |
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| Institution: | Nicolaus Copernicus Astronomical Center, Bartycka 18, 00716 Warszawa, Poland; Department of Physics, Warsaw University, Ho?a 69, Warszawa, Poland |
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| Abstract: | Compact object mergers are one of the currently favoured models for the origin of gamma-ray bursts (GRBs). The discovery of optical afterglows and identification of the nearest, presumably host, galaxies allow the analysis of the distribution of burst sites with respect to these galaxies. Using a model of stellar binary evolution we synthesize a population of compact binary systems which merge within the Hubble time. We include the kicks in the supernovae explosions and calculate orbits of these binaries in galactic gravitational potentials. We present the resulting distribution of merger sites and discuss the results in the framework of the observed GRB afterglows. |
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| Keywords: | binaries: general stars: evolution gamma-rays: bursts |
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