SUZAKU OBSERVATION OF THE HIGH-INCLINATION BINARY EXO 0748–676 IN THE HARD STATE
文献类型：期刊论文
| 作者 | Zhang,Zhongli2,4; Sakurai,Soki4; Makishima,Kazuo3,4,5; Nakazawa,Kazuhiro3,4; Ono,Ko4; Yamada,Shin’ya1; Xu,Haiguang6,7 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2016-05-31 |
| 卷号 | 823期号:2 |
| 关键词 | accretion, accretion disks radiative transfer stars: neutron X-rays: binaries |
| ISSN号 | 0004-637X |
| DOI | 10.3847/0004-637X/823/2/131 |
| 英文摘要 | ABSTRACT Utilizing archived Suzaku data acquired on 2007 December 25 for 46 ks, the X-ray spectroscopic properties of the dipping and eclipsing low-mass X-ray binary EXO 0748?676 were studied. At an assumed distance of 7.1 kpc, the data provided a persistent unabsorbed luminosity of 3.4 × 10 36 erg cm?2 s?1 in 0.6?55 keV. The source was in a relatively bright low/hard state, wherein the 0.6?55 keV spectrum can be successfully explained by a “double-seed” Comptonization model incorporating a common corona with an electron temperature of ～13 keV. The seed photons are thought to be supplied from both the neutron star surface and a cooler truncated disk. Compared to a sample of non-dipping, low-mass X-ray binaries in the low/hard state, the spectrum is subject to stronger Comptonization with a relatively larger Comptonizing y-parameter of ～1.4 and a larger coronal optical depth of ～5. This result, when attributed to the high inclination of EXO 0748?676, suggests that the Comptonizing corona may elongate along the disk plane and provide a longer path for the seed photons when viewed from edge-on inclinations. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-823-2-131 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://119.78.226.72/handle/331011/32151]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.Department of Physics, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji-shi, Tokyo 192-0397, Japan 2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, 200030 Shanghai, PR China 3.Research Center for the Early Universe, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 4.Department of Physics, School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; zzhang@juno.phys.s.u-tokyo.ac.jp 5.MAXI Team, Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan 6.IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, China 7.Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang, Shanghai 200240, China |
| 推荐引用方式 GB/T 7714 | Zhang,Zhongli,Sakurai,Soki,Makishima,Kazuo,et al. SUZAKU OBSERVATION OF THE HIGH-INCLINATION BINARY EXO 0748–676 IN THE HARD STATE[J]. The Astrophysical Journal,2016,823(2). |
| APA | Zhang,Zhongli.,Sakurai,Soki.,Makishima,Kazuo.,Nakazawa,Kazuhiro.,Ono,Ko.,...&Xu,Haiguang.(2016).SUZAKU OBSERVATION OF THE HIGH-INCLINATION BINARY EXO 0748–676 IN THE HARD STATE.The Astrophysical Journal,823(2). |
| MLA | Zhang,Zhongli,et al."SUZAKU OBSERVATION OF THE HIGH-INCLINATION BINARY EXO 0748–676 IN THE HARD STATE".The Astrophysical Journal 823.2(2016). |
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