Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-10-03
Mon.Not.Roy.Astron.Soc.407:1946,2010
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
19 pages, 5 Tables, 12 Figures, updated in response to referee report, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2010.17040.x
We study the compact binary population in star clusters, focusing on binaries containing black holes, using a self-consistent Monte Carlo treatment of dynamics and full stellar evolution. We find that the black holes experience strong mass segregation and become centrally concentrated. In the core the black holes interact strongly with each other and black hole-black hole binaries are formed very efficiently. The strong interactions, however, also destroy or eject the black hole-black hole binaries. We find no black hole-black hole mergers within our simulations but produce many hard escapers that will merge in the galactic field within a Hubble time. We also find several highly eccentric black hole-black hole binaries that are potential LISA sources, suggesting that star clusters are interesting targets for space-based detectors. We conclude that star clusters must be taken into account when predicting compact binary population statistics.
Benacquista Matthew J.
Downing Jonathan M. B.
Giersz Mirek
Spurzem Rainer
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