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Abstract: We simulate black hole binary interactions to examine the probability ofmergers and black hole growth and gravitational radiation signals using aspecific initial distribution of masses for black holes in globular clustersand a simple semi-analytic formalism for dynamical interactions. We include3-body recoil and the latest results in numerical relativity for gravitationalradiation recoil. It is found that while 99% of binaries are ejected from lowmetallicity, low mass clusters; metal rich massive clusters retain 5% of theirbinaries. An interesting fraction of the ejected binaries, especially thosefrom high mass, high metallicity systems, merge on timescales short enough tobe gravitational radiation sources during their mergers with rates approachingthose expected for galactic field black hole binaries. While the merger ratesare comparable, the much larger mass of these binaries and their localizationwill make them appealing targets for advanced LIGO. We single out two possibleMilky Way clusters NGC 6441 and NGC 6388 as having the properties for a goodprobability of retention.



Autor: Kenneth Moody, Steinn Sigurdsson

Fuente: https://arxiv.org/







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