The Formation of a 70 M⊙ Black Hole at High Metallicity
文献类型：期刊论文
| 作者 | Belczynski,K.2; Hirschi,R.3,4; Kaiser,E. A.4; Liu,Jifeng5,6 ; Casares,J.7,8; Lu,Youjun5,6; O’Shaughnessy,R.9; Heger,A.10,11; Justham,S.1,6; Soria,R.5,6
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2020-02-19 |
| 卷号 | 890期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Black hole physics Classical black holes Binary stars |
| DOI | 10.3847/1538-4357/ab6d77 |
| 英文摘要 | Abstract A 70 black hole (BH) was discovered in the Milky Way disk in a long-period detached binary system (LB-1) with a high-metallicity 8 B star companion. Current consensus on the formation of BHs from high-metallicity stars limits the BH mass to be below 20 due to strong mass loss in stellar winds. Using analytic evolutionary formulae, we show that the formation of a 70 BH in a high-metallicity environment is possible if wind mass-loss rates are reduced by factor of five. As observations indicate, a fraction of massive stars have surface magnetic fields that may quench the wind mass-loss, independently of stellar mass and metallicity. We confirm such a scenario with detailed stellar evolution models. A nonrotating 85 star model at Z?=?0.014 with decreased winds ends up as a 71 star prior to core collapse with a 32 He core and a 28 CO core. Such a star avoids the pair-instability pulsation supernova mass loss that severely limits BH mass and may form a ～70 BH in the direct collapse. Stars that can form 70 BHs at high Z expand to significant sizes, with radii of R???600 , however, exceeding the size of the LB-1 orbit. Therefore, we can explain the formation of BHs up to 70 at high metallicity and this result is valid whether or not LB-1 hosts a massive BH. However, if LB-1 hosts a massive BH we are unable to explain how such a binary star system could have formed without invoking some exotic scenarios. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-890-2-AB6D77 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/53977]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Anton Pannekoek Institute of Astronomy and GRAPPA, University of Amsterdam, 1090 GE Amsterdam, The Netherlands 2.Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland; chrisbelczynski@gmail.com 3.Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan 4.Astrophysics Group, Keele University, Keele ST5 5BG, UK 5.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 6.School of Astronomy and Space Science, University of the Chinese Academy of Sciences, Beijing 100012, People’s Republic of China 7.Instituto de Astrofísica de Canarias, c/Via Laceta s/n, E-38205 La Laguna, Tenerife, Spain 8.Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain 9.Rochester Institute of Technology, Rochester, NY 14623, USA 10.School of Physics and Astronomy, Monash University, Victoria 3800, Australia |
| 推荐引用方式 GB/T 7714 | Belczynski,K.,Hirschi,R.,Kaiser,E. A.,et al. The Formation of a 70 M⊙ Black Hole at High Metallicity[J]. The Astrophysical Journal,2020,890(2). |
| APA | Belczynski,K..,Hirschi,R..,Kaiser,E. A..,Liu,Jifeng.,Casares,J..,...&Soria,R..(2020).The Formation of a 70 M⊙ Black Hole at High Metallicity.The Astrophysical Journal,890(2). |
| MLA | Belczynski,K.,et al."The Formation of a 70 M⊙ Black Hole at High Metallicity".The Astrophysical Journal 890.2(2020). |
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