A wide star-black-hole binary system from radial-velocity measurements
文献类型：期刊论文
| 作者 | Liu, Jifeng27,28,29; Zhang, Haotong29; Howard, Andrew W.26; Bai, Zhongrui29; Lu, Youjun28,29; Soria, Roberto25,28; Justham, Stephen24,28,29; Li, Xiangdong22,23; Zheng, Zheng21; Wang, Tinggui20 |
| 刊名 | NATURE
 |
| 出版日期 | 2019-11-28 |
| 卷号 | 575期号:7784页码:618-+ |
| ISSN号 | 0028-0836 |
| DOI | 10.1038/s41586-019-1766-2 |
| 通讯作者 | Liu, Jifeng(jfliu@nao.cas.cn) ; Zhang, Haotong(htzhang@bao.ac.cn) |
| 英文摘要 | All stellar-mass black holes have hitherto been identified by X-rays emitted from gas that is accreting onto the black hole from a companion star. These systems are all binaries with a black-hole mass that is less than 30 times that of the Sun(1-4). Theory predicts, however, that X-ray-emitting systems form a minority of the total population of star-black-hole binaries(5,6). When the black hole is not accreting gas, it can be found through radial-velocity measurements of the motion of the companion star. Here we report radial-velocity measurements taken over two years of the Galactic B-type star, LB-1. We find that the motion of the B star and an accompanying Ha emission line require the presence of a dark companion with a mass of 68(+11)(-13) solar masses, which can only be a black hole. The long orbital period of 78.9 days shows that this is a wide binary system. Gravitational-wave experiments have detected black holes of similar mass, but the formation of such massive ones in a high-metallicity environment would be extremely challenging within current stellar evolution theories. |
| WOS关键词 | BLANKETED MODEL ATMOSPHERES ; X-RAY BINARIES ; M-CIRCLE-DOT ; STELLAR EVOLUTION ; FUNDAMENTAL PLANE ; ACCRETION FLOWS ; MASS ; EMISSION ; ISOCHRONES ; SPECTRUM |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | NATURE PUBLISHING GROUP |
| WOS记录号 | WOS:000500036800050 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/35201]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Liu, Jifeng; Zhang, Haotong |
| 作者单位 | 1.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Nanjing, Jiangsu, Peoples R China 2.GRANTECAN, Brena Baja, Spain 3.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Yunnan Observ, Kunming, Yunnan, Peoples R China 4.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China 5.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA 6.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA 7.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing, Peoples R China 8.Tsinghua Univ, Dept Phys, Beijing, Peoples R China 9.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai, Peoples R China 10.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jifeng,Zhang, Haotong,Howard, Andrew W.,et al. A wide star-black-hole binary system from radial-velocity measurements[J]. NATURE,2019,575(7784):618-+. |
| APA | Liu, Jifeng.,Zhang, Haotong.,Howard, Andrew W..,Bai, Zhongrui.,Lu, Youjun.,...&Cui, Xiangqun.(2019).A wide star-black-hole binary system from radial-velocity measurements.NATURE,575(7784),618-+. |
| MLA | Liu, Jifeng,et al."A wide star-black-hole binary system from radial-velocity measurements".NATURE 575.7784(2019):618-+. |
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