Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events
文献类型：期刊论文
| 作者 | Yue, Xiao-Jun3,5; Han, Wen-Biao1,5; Chen, Xian2,4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-03-20 |
| 卷号 | 874期号:1页码:13 |
| ISSN号 | 0004-637X |
| 关键词 | dark matter gravitational waves stars: black holes |
| DOI | 10.3847/1538-4357/ab06f6 |
| 英文摘要 | 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 (10(3) similar to 10(5))M-circle dot. 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 10(4) M-circle dot 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. |
| 资助项目 | NSFC[11773059] ; NSFC[11690023] ; NSFC[11873022] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SYS016] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000461790300008 |
| 源URL | [http://119.78.226.72/handle/331011/31897]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Han, Wen-Biao |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Taiyuan Univ Technol, Coll Informat & Comp, Taiyuan 030024, Shanxi, Peoples R China 4.Peking Univ, Sch Phys, Astron Dept, Beijing 100871, Peoples R China 5.Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yue, Xiao-Jun,Han, Wen-Biao,Chen, Xian. Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events[J]. ASTROPHYSICAL JOURNAL,2019,874(1):13. |
| APA | Yue, Xiao-Jun,Han, Wen-Biao,&Chen, Xian.(2019).Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events.ASTROPHYSICAL JOURNAL,874(1),13. |
| MLA | Yue, Xiao-Jun,et al."Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events".ASTROPHYSICAL JOURNAL 874.1(2019):13. |
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来源：上海天文台
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