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.
Rok vydání:	2017
Předmět:	Astrophysics - High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
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
Externí odkaz:	http://arxiv.org/abs/1712.04937 Zobrazit plný text záznamu View this record from Arxiv