Re-estimating the Spin Parameter of the Black Hole in Cygnus X-1
文献类型：期刊论文
| 作者 | Zhao,Xueshan3,5; Gou,Lijun3,5 ; Dong,Yanting3,5; Zheng,Xueying3,5; Steiner,James F.2; Miller-Jones,James C. A.1; Bahramian,Arash1; Orosz,Jerome A.4; Feng,Ye3,5
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-02-01 |
| 卷号 | 908期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | X-ray binary stars Black hole physics High energy astrophysics |
| DOI | 10.3847/1538-4357/abbcd6 |
| 英文摘要 | Abstract Cygnus X-1 is a well-studied persistent black hole X-ray binary. Recently, the three parameters needed to estimate the black hole spin of this system, namely the black hole mass M, the orbital inclination i, and the source distance D, have been updated. In this work we redetermine the spin parameter using the continuum-fitting technique for those updated parameter values. Based on the assumption that the spin axis of the black hole is aligned with the orbital plane, we fit the thermal disk component to a fully relativistic thin accretion disk model. The error in the spin estimate arising from the combined observational uncertainties is obtained via Monte Carlo simulations. We demonstrate that, without considering the counteracting torque effect, the new spin parameter is constrained to be a*?>?0.9985 (3σ), which confirms that the spin of the black hole in Cygnus X-1 is extreme. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-908-2-ABBCD6 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/60544]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Gou,Lijun |
| 作者单位 | 1.International Centre for Radio Astronomy Research—Curtin University, GPO Box U1987, Perth, WA 6845, Australia 2.Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA 3.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Datun Road A20, Beijing 100049, People’s Republic of China 4.Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1221, USA 5.Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Datun Road A20, Beijing 100012, People’s Republic of China; xszhao@nao.cas.cn, lgou@nao.cas.cn |
| 推荐引用方式 GB/T 7714 | Zhao,Xueshan,Gou,Lijun,Dong,Yanting,et al. Re-estimating the Spin Parameter of the Black Hole in Cygnus X-1[J]. The Astrophysical Journal,2021,908(2). |
| APA | Zhao,Xueshan.,Gou,Lijun.,Dong,Yanting.,Zheng,Xueying.,Steiner,James F..,...&Feng,Ye.(2021).Re-estimating the Spin Parameter of the Black Hole in Cygnus X-1.The Astrophysical Journal,908(2). |
| MLA | Zhao,Xueshan,et al."Re-estimating the Spin Parameter of the Black Hole in Cygnus X-1".The Astrophysical Journal 908.2(2021). |
入库方式： OAI收割
来源：国家天文台
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。