DYNAMICAL MASS CONSTRAINTS ON THE ULTRALUMINOUS X-RAY SOURCE NGC 1313 X-2
文献类型：期刊论文
| 作者 | Liu, Jifeng1,2 ; Orosz, Jerome3; Bregman, Joel N.4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2012-01-20 |
| 卷号 | 745期号:1 |
| 关键词 | accretion, accretion disks black hole physics X-rays: binaries X-rays: individual (NGC 1313 X-2) |
| 英文摘要 | Dynamical mass measurements hold the key to answering whether ultraluminous X-ray sources (ULXs) are intermediate-mass black holes (IMBHs) or stellar-mass black holes with special radiation mechanisms. NGC 1313 X-2 is so far the only ULX with Hubble Space Telescope light curves, the orbital period, and the black hole's radial velocity amplitude based on the He II lambda 4686 disk emission line shift of similar to 200 km s(-1). We constrain its black hole mass and other parameters by fitting observations to a binary light curve code with accommodations for X-ray heating of the accretion disk and the secondary. Given the dynamical constraints from the observed light curves and the black hole radial motion and the observed stellar environment age, the only acceptable models are those with 40-50 Myr old intermediate-mass secondaries in their helium core and hydrogen shell burning phase filling 40%-80% of their Roche lobes. The black hole can be a massive black hole of a few tens of M-circle dot that can be produced from stellar evolution of low-metallicity stars, or an IMBH of a few hundred to above 1000 M-circle dot if its true radial velocity 2K' < 40 km s(-1). Further observations are required to better measure the black hole radial motion and the light curves in order to determine whether NGC1313 X-2 is a stellar-mass black hole or an IMBH. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300316600089 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6286]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Natl Astron Observ China, Beijing 100012, Peoples R China 2.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 3.San Diego State Univ, Dept Astron, San Diego, CA 92182 USA 4.Univ Michigan, Dept Astron, Ann Arbor, MI USA |
| 推荐引用方式 GB/T 7714 | Liu, Jifeng,Orosz, Jerome,Bregman, Joel N.. DYNAMICAL MASS CONSTRAINTS ON THE ULTRALUMINOUS X-RAY SOURCE NGC 1313 X-2[J]. ASTROPHYSICAL JOURNAL,2012,745(1). |
| APA | Liu, Jifeng,Orosz, Jerome,&Bregman, Joel N..(2012).DYNAMICAL MASS CONSTRAINTS ON THE ULTRALUMINOUS X-RAY SOURCE NGC 1313 X-2.ASTROPHYSICAL JOURNAL,745(1). |
| MLA | Liu, Jifeng,et al."DYNAMICAL MASS CONSTRAINTS ON THE ULTRALUMINOUS X-RAY SOURCE NGC 1313 X-2".ASTROPHYSICAL JOURNAL 745.1(2012). |
入库方式： OAI收割
来源：国家天文台
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