Post-Newtonian Dynamics in Dense Star Clusters: Highly-Eccentric, Highly-Spinning, and Repeated Binary Black Hole Mergers
Autor: | Rodriguez, Carl L., Amaro-Seoane, Pau, Chatterjee, Sourav, Rasio, Frederic A. |
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Rok vydání: | 2017 |
Předmět: | |
Zdroj: | Phys. Rev. D 98, 123005 (2018) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevD.98.123005 |
Popis: | We present models of realistic globular clusters with post-Newtonian dynamics for black holes. By modeling the relativistic accelerations and gravitational-wave emission in isolated binaries and during three- and four-body encounters, we find that nearly half of all binary black hole mergers occur inside the cluster, with about 10% of those mergers entering the LIGO/Virgo band with eccentricities greater than 0.1. In-cluster mergers lead to the birth of a second generation of black holes with larger masses and high spins, which, depending on the black hole natal spins, can sometimes be retained in the cluster and merge again. As a result, globular clusters can produce merging binaries with detectable spins regardless of the birth spins of black holes formed from massive stars. These second-generation black holes would also populate any upper mass gap created by pair-instability supernovae. Comment: 9 pages, 3 figures, 2 appendices. To appear in Physical Review Letters |
Databáze: | arXiv |
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