NAOC Open IR
Re-estimating the Spin Parameter of the Black Hole in Cygnus X-1
Zhao,Xueshan1,2; Gou,Lijun1,2; Dong,Yanting1,2; Zheng,Xueying1,2; Steiner,James F.3; Miller-Jones,James C. A.4; Bahramian,Arash4; Orosz,Jerome A.5; Feng,Ye1,2
2021-02-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume908Issue:2
AbstractAbstract 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.
KeywordX-ray binary stars Black hole physics High energy astrophysics
DOI10.3847/1538-4357/abbcd6
Language英语
WOS IDIOP:0004-637X-908-2-abbcd6
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/60545
Collection中国科学院国家天文台
Corresponding AuthorGou,Lijun
Affiliation1.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
2.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Datun Road A20, Beijing 100049, People’s Republic of China
3.Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
4.International Centre for Radio Astronomy Research—Curtin University, GPO Box U1987, Perth, WA 6845, Australia
5.Astronomy Department, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1221, USA
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhao,Xueshan]'s Articles
[Gou,Lijun]'s Articles
[Dong,Yanting]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhao,Xueshan]'s Articles
[Gou,Lijun]'s Articles
[Dong,Yanting]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhao,Xueshan]'s Articles
[Gou,Lijun]'s Articles
[Dong,Yanting]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.