The distribution of compact object merger sites

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Compact object mergers are one of the currently favoured models for the origin of gamma-ray bursts. The discovery of optical afterglows and subsequent identification of the nearest, presumably host, galaxies makes it possible to analyze the distribution of burst sites with respect to the host 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 supernova explosions and calculate orbits of the surviving binary systems in the galactic gravitational potential. We present the resulting distribution of merger sites and discuss it in the framework of the observed GRB afterglows.

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