Stellar black hole binary mergers in open clusters

被引：0
|
作者：
Rastello, S. [1 ,2 ]
Arca-Sedda, M. [3 ]
Capuzzo-Dolcetta, R. [1 ]
机构：
[1] Sapienza Univ Roma, Dep Phys, Ple A Moro 5, I-00185 Rome, Italy
[2] Univ Padua, Dip Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy
[3] Astron Rech Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany
来源：
15TH MARCEL GROSSMANN MEETING, PT A | 2022年
关键词：
Galaxy: open clusters and associations: general; stars: black holes stars: kinematics and dynamics; gravitational waves; GRAVITATIONAL-WAVE GENERATION;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the evolution of a massive primordial hard black hole binary (BHB) in small- and intermediate-size isolated star clusters, modelled as proxies of galactic open clusters (OCs), by means of direct N-body simulations. Some of our models show a significant hardening of the BHB in a relatively short time. Some of them merge within the cluster. The perturbation of stars around BHB systems is key to induce their coalescence. Under our assumptions, we estimate a BHB merger rate of R-mrg similar to 2 yr(-1) Gpc(-3). In some cases the BHB triggers tidal disruption events which, however, are not linked to the GW emission.
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收藏
页码：1634 / 1641
页数：8
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