PROSPECTS FOR CONSTRAINING THE SPIN OF THE MASSIVE BLACK HOLE AT THE GALACTIC CENTER VIA THE RELATIVISTIC MOTION OF A SURROUNDING STAR
文献类型：期刊论文
| 作者 | Yu, Qingjuan1; Zhang, Fupeng1,2; Lu, Youjun3,4 ; Lu,Youjun
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016-08-20 |
| 卷号 | 827期号:2 |
| 关键词 | black hole physics gravitation Galaxy: center relativistic processes |
| 英文摘要 | In this paper, we investigate the quality of constraining the spin of the massive black hole (MBH) at the Galactic center (GC). by using full general relativistic simulations of the motion of a surrounding star. We obtain the dependence mapping. of the spin-induced signals on any spin direction of the MBH for given example stars, which indicates the feasibility to test whether the spin direction is the same as the normal of the young stellar disk located at the GC, and, further, to provide insights into the assembly history of the MBH. We demonstrate the quality of constraining the MBH spin that may be achieved, given any set of the astrometric and the redshift precisions of observational facilities. We find that in the ranges of the astrometric and the velocity precisions with 1-30 mu as and 0.1-10 km s(-1), an improvement in astrometric precision would be more effective at improving the quality of constraining the spin than an improvement in velocity precision. We obtain the parameter space of the semimajor axis and the eccentricity for the orbit of the target star that a high-precision constraint on the GC MBH spin can be obtained via the motion of the star. Our results show that the spin of the GC MBH can be constrained with a. 1 sigma error less than or similar to 0.1 or even less than or similar to 0.02 by monitoring the orbital motion of a star, if existing as expected, with a semimajor axis less than or similar to 300 au and eccentricity greater than or similar to 0.95 over a period shorter than a decade through future facilities. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SAGITTARIUS A-ASTERISK ; STELLAR ORBITS ; SGR ; PULSARS ; MASSES ; LINE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000384001600026 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6888]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou 510275, Guangdong, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Qingjuan,Zhang, Fupeng,Lu, Youjun,et al. PROSPECTS FOR CONSTRAINING THE SPIN OF THE MASSIVE BLACK HOLE AT THE GALACTIC CENTER VIA THE RELATIVISTIC MOTION OF A SURROUNDING STAR[J]. ASTROPHYSICAL JOURNAL,2016,827(2). |
| APA | Yu, Qingjuan,Zhang, Fupeng,Lu, Youjun,&Lu,Youjun.(2016).PROSPECTS FOR CONSTRAINING THE SPIN OF THE MASSIVE BLACK HOLE AT THE GALACTIC CENTER VIA THE RELATIVISTIC MOTION OF A SURROUNDING STAR.ASTROPHYSICAL JOURNAL,827(2). |
| MLA | Yu, Qingjuan,et al."PROSPECTS FOR CONSTRAINING THE SPIN OF THE MASSIVE BLACK HOLE AT THE GALACTIC CENTER VIA THE RELATIVISTIC MOTION OF A SURROUNDING STAR".ASTROPHYSICAL JOURNAL 827.2(2016). |
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来源：国家天文台
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