ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES
文献类型：期刊论文
| 作者 | Xu, Ya-Di1; Cao, Xinwu2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016-08-10 |
| 卷号 | 827期号:1 |
| 关键词 | Accretion, Accretion Disks Black Hole Physics Ism: Jets And Outflows Radiation Mechanisms: Thermal X-rays: Binaries X-rays: Individual (4u 1630) |
| ISSN号 | 0004-637X |
| DOI | 10.3847/0004-637X/827/1/14 |
| 英文摘要 | The atomic features in the X-ray spectra of. ultraluminous X-ray sources (ULXs) may be associated with the outflow, which may provide a way to explore the physics of the ULXs. We construct a conical outflow model. and calculate the thermal X-ray Fe emission lines from the outflows. Our results show that thermal line luminosity decreases with increasing outflow velocity and/or opening angle of the outflow for a fixed kinetic power of the outflows. Assuming the kinetic power of the outflows to be comparable with the accretion power in the ULXs, we find that the equivalent width can be several eV for the thermal X-ray Fe emission line from the outflows in the ULXs with stellar-mass black holes. The thermal line luminosity is proportional to 1/M-bh (M-bh is the black hole mass of the ULX). The equivalent width decreases with the black hole mass, which implies that the Fe line emission from the outflows can hardly be detected if the ULXs contain intermediate-mass black holes. Our results suggest that the thermal X-ray Fe line emission should be preferentially be detected in the ULXs with high kinetic power slowly moving outflows from the accretion disks surrounding stellar-mass black holes/neutron stars. The recently observed X-ray atomic features of the outflows in a. ULX may imply that it contains a stellar-mass black hole. |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; BLACK-HOLE ; ACCRETION DISKS ; RADIO JETS ; METALLICITY GRADIENTS ; 4U 1630-47 ; SS 433 ; DIAGNOSTICS ; LUMINOSITY ; GALAXIES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000382009500014 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23631]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Xu, Ya-Di |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Dept Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, SHAO XMU Joint Ctr Astrophys, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Ya-Di,Cao, Xinwu. ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES[J]. ASTROPHYSICAL JOURNAL,2016,827(1). |
| APA | Xu, Ya-Di,&Cao, Xinwu.(2016).ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES.ASTROPHYSICAL JOURNAL,827(1). |
| MLA | Xu, Ya-Di,et al."ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES".ASTROPHYSICAL JOURNAL 827.1(2016). |
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来源：紫金山天文台
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