There are two major physical models for cosmological GRBs: the compact object merger model, and the collapsar model. Both models predict a relation bewtween GRB sites and their galaxies. However, this relation is less strict in the case of the compact object merger model. In this paper we present a calculation of compact object population properties and the consequent distribution of their mergers in relation to the host galaxies. We present our model in Sect. 2, and show the results and compare them with observations in Sect. 3.
|Figure 1: Cumulative distribution of projected distances on the sky: the left panel shows the distribution of distances travelled by a compact object binary in the case of propagation in an empty space, while the right panel shows the distribution of the distances between the center of the massive host galaxy and the merger site. The solid line corresponds to the case kms-1, the dotted line kms-1, the short-dashed line kms-1, and the long dashed line kms-1|
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