DYNAMICAL FORMATION OF THE GW150914 BINARY BLACK HOLE

被引：187

作者：

Rodriguez, Carl L. ^{[1
,2
]}

Haster, Carl-Johan ^{[3
]}

Chatterjee, Sourav ^{[1
,2
]}

Kalogera, Vicky ^{[1
,2
]}

Rasio, Frederic A. ^{[1
,2
]}

机构：

[1] CIERA, 2145 Sheridan Rd, Evanston, IL 60208 USA

[2] Northeastern Univ, Dept Phys & Astron, 2145 Sheridan Rd, Evanston, IL 60208 USA

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 824卷 / 01期

基金：

美国国家科学基金会;

关键词：

globular clusters: general; gravitational waves; stars: black holes; GLOBULAR-CLUSTER SYSTEMS; STELLAR EVOLUTION; STAR-CLUSTERS; MASS; LUMINOSITY; RETENTION; GALAXIES; MERGERS;

D O I：

10.3847/2041-8205/824/1/L8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore the possibility that GW150914, the binary black hole (BBH) merger recently detected by Advanced LIGO, was formed by gravitational interactions in the core of a dense star cluster. Using models of globular clusters (GCs) with detailed N-body dynamics and stellar evolution, we show that a typical cluster with a mass of 3 x 10(5) M-circle dot. to 6 x 10(5) M-circle dot is optimal for forming GW150914-like BBHs that will merge in the local universe. We identify the most likely dynamical processes for forming GW150914 in such a cluster, and we show that the detection of GW150914 is consistent with the masses and merger rates expected for BBHs from GCs. Our results show that dynamical processes provide a significant and well-understood pathway for forming BBH mergers in the local universe. Understanding the contribution of dynamics to the BBH merger problem is a critical step in unlocking the full potential of gravitational-wave astronomy.

引用

页数：7

共 42 条

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