The clumpy absorber in the high-mass X-ray binary Vela X-1
文献类型：期刊论文
| 作者 | Grinberg, V.14; Hell, N.13; El Mellah, I.12; Neilsen, J.11; Sander, A. A. C.10; Leutenegger, M.7,8,9; Furst, F.6; Huenemoerder, D. P.1; Kretschmar, P.6; Kuehnel, M.4,5 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2017-12-15 |
| 卷号 | 608 |
| ISSN号 | 1432-0746 |
| 关键词 | X-rays: Individuals: Vela X-1 X-rays: Binaries Stars: Winds, Outflows Stars: Massive |
| DOI | 10.1051/0004-6361/201731843 |
| 英文摘要 | Bright and eclipsing, the high-mass X-ray binary Vela X-1 offers a unique opportunity to study accretion onto a neutron star from clumpy winds of O/B stars and to disentangle the complex accretion geometry of these systems. In Chandra-HETGS spectroscopy at orbital phase similar to 0.25, when our line of sight towards the source does not pass through the large-scale accretion structure such as the accretion wake, we observe changes in overall spectral shape on timescales of a few kiloseconds. This spectral variability is, at least in part, caused by changes in overall absorption and we show that such strongly variable absorption cannot be caused by unperturbed clumpy winds of O/B stars. We detect line features from high and low ionization species of silicon, magnesium, and neon whose strengths and presence depend on the overall level of absorption. These features imply a co-existence of cool and hot gas phases in the system, which we interpret as a highly variable, structured accretion flow close to the compact object such as has been recently seen in simulations of wind accretion in high-mass X-ray binaries. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000418460000009 |
| 源URL | [http://119.78.226.72/handle/331011/32455]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Grinberg, V. |
| 作者单位 | 1.MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA 2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain 4.Univ Erlangen Nurnberg, ECAP, D-96049 Bamberg, Germany 5.Univ Erlangen Nurnberg, Dr Karl Remeis Sternwarte, D-96049 Bamberg, Germany 6.ESA, European Space Astron Ctr ESAC, Sci Operat Dept, Madrid 28692, Spain 7.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA 8.UMBC, Ctr Space Sci & Technol, Baltimore, MD 21250 USA 9.UMBC, Dept Phys, CRESST, Baltimore, MD 21250 USA 10.Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Potsdam, Germany |
| 推荐引用方式 GB/T 7714 | Grinberg, V.,Hell, N.,El Mellah, I.,et al. The clumpy absorber in the high-mass X-ray binary Vela X-1[J]. ASTRONOMY & ASTROPHYSICS,2017,608. |
| APA | Grinberg, V..,Hell, N..,El Mellah, I..,Neilsen, J..,Sander, A. A. C..,...&Nowak, M. A..(2017).The clumpy absorber in the high-mass X-ray binary Vela X-1.ASTRONOMY & ASTROPHYSICS,608. |
| MLA | Grinberg, V.,et al."The clumpy absorber in the high-mass X-ray binary Vela X-1".ASTRONOMY & ASTROPHYSICS 608(2017). |
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来源：上海天文台
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