Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events
文献类型：期刊论文
| 作者 | Yue,Xiao-Jun1,2; Han,Wen-Biao1,3; Chen,Xian4,5 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-03-19 |
| 卷号 | 874期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | dark matter gravitational waves stars: black holes |
| DOI | 10.3847/1538-4357/ab06f6 |
| 英文摘要 | Abstract 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. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-874-1-AB06F6 |
| 源URL | [http://119.78.226.72/handle/331011/31881]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.Shanghai Astronomical Observatory, Shanghai 200030, People’s Republic of China; wbhan@shao.ac.cn 2.College of Information and Computing, Taiyuan University of Technology, Taiyuan 030024, People’s Republic of China 3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 4.Astronomy Department, School of Physics, Peking University, Beijing 100871, People’s Republic of China 5.Kavli Institute for Astronomy and Astrophysics at Peking University, Beijing 100871, People’s Republic of 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]. The Astrophysical Journal,2019,874(1). |
| APA | Yue,Xiao-Jun,Han,Wen-Biao,&Chen,Xian.(2019).Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events.The Astrophysical Journal,874(1). |
| MLA | Yue,Xiao-Jun,et al."Dark Matter: An Efficient Catalyst for Intermediate-mass-ratio-inspiral Events".The Astrophysical Journal 874.1(2019). |
入库方式： OAI收割
来源：上海天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。