MG13 - Talk detail

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Abstract

It has been known for some time that neutron stars receive natal kicks when they are formed in core-collapse supernovae. Whether black holes receive these kicks too is still a matter of debate. Do black holes have to receive natal kicks in order to explain the observed Galactic distribution of low-mass X-ray binaries? We perform population synthesis calculations of these binaries, applying both kicks due to the supernova mass loss and natal kicks to the newly-formed black hole. We then integrate the trajectories of the binaries in the Galactic potential. We find that natal kicks are in fact necessary to reach the large distances above the Galactic plane achieved by some binaries. Further, we find that the distribution of natal kicks would seem to be similar to that of neutron stars, rather than one where the kick velocities are reduced by the ratio of black hole to neutron star mass.

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