Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events
Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events
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暗物质：中等质量比激发事件的有效催化剂
DOI：
10.3847/1538-4357/ab06f6
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发表时间：
2018-02
影响因子：
4.9
通讯作者：
Chen Xian
中科院分区：
文献类型：
--
作者：
Yue Xiao-Jun;Han Wen-Biao;Chen Xian
Gravitational waves (GWs) can be produced if a stellar compact object, such as a black hole (BH) or neutron star, inspirals into an intermediate-massive black hole of . Such a system may be produced in the center of a globular cluster or a nuclear star cluster and is known as an intermediate- or extreme-mass-ratio inspiral (IMRI or EMRI). Motivated by the recent suggestions that dark matter minispikes could form around IMBHs, we study the effect of dynamical friction against DM on the merger rate of IMRIs/EMRIs. We find that the merger timescale of IMBHs with BHs and NSs would be shortened by two to three orders of magnitude. As a result, the event rate of IMRIs/EMRIs are enhanced by orders of magnitude relative to that in the case of no DM minispikes. In the most extreme case where IMBHs are small and the DM minispikes have a steep density profile, all the BH in GCs and NSCs might be exhausted so that the mergers with NSs would dominate the current IMRIs/EMRIs. Our results suggest that the mass function of the IMBHs below 104 M⊙ would bear imprints of the distribution of DM minispikes because these low-mass IMBHs can grow efficiently in the presence of DM minispikes by merging with BHs and NSs. Future space-based GW detectors, like LISA, Taiji, and Tianqin, can measure the IMRI/EMRI rate and hence constrain the distribution of DM around IMBHs.
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DOI：
10.1086/158553
发表时间：
1980-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
P. Young
通讯作者：
P. Young
DOI：
10.1007/978-94-010-2105-0
发表时间：
1974
期刊：
--
影响因子：
--
作者：
R. Giacconi;H. Gursky
通讯作者：
R. Giacconi;H. Gursky
DOI：
10.1016/s1384-1076(97)00039-0
发表时间：
1996-01
期刊：
--
影响因子：
--
作者：
G. Quinlan
通讯作者：
G. Quinlan
DOI：
10.1111/j.1365-2966.2008.13348.x
发表时间：
2008-04
影响因子：
4.8
作者：
I. Baldry;K. Glazebrook;S. Driver
通讯作者：
I. Baldry;K. Glazebrook;S. Driver
DOI：
--
发表时间：
2008
期刊：
--
影响因子：
--
作者：
通讯作者：
--