Constraining Stellar-mass Black Hole Mergers in AGN Disks Detectable with LIGO

被引：189

作者：

McKernan, Barry ^{[1
,2
,3
]}

Ford, K. E. Saavik ^{[1
,2
,3
]}

Bellovary, J. ^{[2
,4
]}

Leigh, N. W. C. ^{[2
]}

Haiman, Z. ^{[5
]}

Kocsis, B. ^{[6
]}

Lyra, W. ^{[2
]}

Mac Low, M. -M. ^{[2
]}

Metzger, B. ^{[5
]}

O'Dowd, M. ^{[2
,3
,7
]}

Endlich, S. ^{[8
]}

Rosen, D. J. ^{[2
]}

机构：

[1] CUNY, BMCC, Dept Sci, 199 Chambers St, New York, NY 10007 USA

[2] Amer Museum Nat Hist, Dept Astrophys, Cent Pk West, New York, NY 10028 USA

[3] CUNY, Grad Ctr, 365 5th Ave, New York, NY 10016 USA

[4] CUNY, QCC, Dept Phys, New York, NY 11364 USA

[5] Columbia Univ, Columbia Astrophys Lab, 538 W 120th St, New York, NY 10027 USA

[6] Eotvos Lorand Univ, Inst Phys, H-1117 Budapest, Hungary

[7] CUNY Lehman, Dept Phys, New York, NY 10468 USA

[8] Stanford Univ, Stanford Inst Theoret Phys, Palo Alto, CA 94306 USA

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 866卷 / 01期

关键词：

accretion; accretion disks; binaries: close; black hole physics; galaxies: active; gravitational waves; ACTIVE GALACTIC NUCLEI; X-RAY BINARIES; CENTRAL PARSEC; GALAXY; DISCS; ACCRETION; EVOLUTION; MIGRATION; DYNAMICS; DURATION;

D O I：

10.3847/1538-4357/aadae5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Black hole (BH) mergers detectable with the Laser Interferometer Gravitational-wave Observatory (LIGO) can occur in active galactic nucleus (AGN) disks. Here we parameterize the merger rates, the mass spectrum, and the spin spectrum of BHs in AGN disks. The predicted merger rate spans similar to 10(-3)-10(4) Gpc(-1) yr(-1), so upper limits from LIGO (< 212 Gpc(-1) yr(-1)) already constrain it. The predicted mass spectrum has the form of a broken power law, consisting of a pre-existing BH power-law mass spectrum and a harder power-law mass spectrum resulting from mergers. The predicted spin spectrum is multipeaked with the evolution of retrograde spin BHs in the gas disk playing a key role. We outline the large uncertainties in each of these LIGO observables for this channel and we discuss ways in which they can be constrained in the future.

引用

页数：7

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