Spin-Orbit Misalignment of Merging Black Hole Binaries with Tertiary Companions

doi:10.3847/2041-8213/aa8727

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	Spin-Orbit Misalignment of Merging Black Hole Binaries with Tertiary Companions
	Liu, Bin 1,2; Lai, Dong 2
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2017-09-01
卷号	846 期号:1
关键词	Black Hole Physics Gravitational Waves
ISSN号	2041-8205
DOI	10.3847/2041-8213/aa8727
英文摘要	We study the effect of an external companion on the orbital and spin evolution of merging black hole (BH) binaries. A sufficiently nearby and inclined companion can excite Lidov-Kozai (LK) eccentricity oscillations in the binary, thereby shortening its merger time. During such LK-enhanced orbital decay, the spin axis of the BH generally exhibits chaotic evolution, leading to a wide range (0 degrees-180 degrees) of the final spin-orbit misalignment angle from an initially aligned configuration. For systems that do not experience eccentricity excitation, only modest (less than or similar to 20 degrees) spin-orbit misalignment can be produced, and we derive an analytic expression for the final misalignment using the principle of adiabatic invariance. The spin-orbit misalignment directly impacts the gravitational waveform and can be used to constrain the formation scenarios of BH binaries and dynamical influences of external companions.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000408776300001
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32559]
专题	中国科学院上海天文台
通讯作者	Liu, Bin
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Cornell Univ, Cornell Ctr Astrophys & Planetary Sci, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Liu, Bin,Lai, Dong. Spin-Orbit Misalignment of Merging Black Hole Binaries with Tertiary Companions[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,846(1).
APA	Liu, Bin,&Lai, Dong.(2017).Spin-Orbit Misalignment of Merging Black Hole Binaries with Tertiary Companions.ASTROPHYSICAL JOURNAL LETTERS,846(1).
MLA	Liu, Bin,et al."Spin-Orbit Misalignment of Merging Black Hole Binaries with Tertiary Companions".ASTROPHYSICAL JOURNAL LETTERS 846.1(2017).