Probing dark matter spikes via gravitational waves of extreme-mass-ratio inspirals

doi:10.1007/s11433-022-1930-9

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	Probing dark matter spikes via gravitational waves of extreme-mass-ratio inspirals
	Li, Gen-Liang ; Tang, Yong 3; Wu, Yue-Liang
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2022
卷号	65 期号:10 页码:100412
关键词	EXISTENCE
ISSN号	1674-7348
DOI	10.1007/s11433-022-1930-9
英文摘要	The exact properties of dark matter remain largely unknown despite the accumulating evidence. If dark matter is composed of weakly interacting massive particles, it would be accreted by the black hole in the galactic center and form a dense, cuspy spike. Dynamical friction from this spike may have observable effects in a binary system. We consider extreme-mass-ratio inspiral (EMRI) binaries comprising massive black holes harbored in dark matter spikes and stellar mass objects in elliptic orbits. We find that the gravitational-wave waveforms in the frequency domain can be substantially modified. In particular, we show that dark matter can suppress the characteristic strain of a gravitational wave at low frequency but enhance it at a higher domain. These effects are more dramatic as the dark matter density increases. The results indicate that the signal-to-noise ratio of EMRIs can be strongly reduced near 10(-3)-0.3 Hz but enhanced near 1.0 Hz with a higher sensitivity, which can be probed via the future space-borne gravitational-wave (GW) detectors, LISA and TAIJI. The findings will have important impacts on the detection and parameter inference of EMRIs.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27828]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci UCAS, Beijing 100049, Peoples R China 2.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 3.UCAS, Int Ctr Theoret Phys Asia Pacific ICTP AP, UNESCO, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Gen-Liang,Tang, Yong,Wu, Yue-Liang. Probing dark matter spikes via gravitational waves of extreme-mass-ratio inspirals[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2022,65(10):100412.
APA	Li, Gen-Liang,Tang, Yong,&Wu, Yue-Liang.(2022).Probing dark matter spikes via gravitational waves of extreme-mass-ratio inspirals.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,65(10),100412.
MLA	Li, Gen-Liang,et al."Probing dark matter spikes via gravitational waves of extreme-mass-ratio inspirals".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 65.10(2022):100412.