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, Zhongli1,3 ; Sakurai, Soki3; Makishima, Kazuo2,3,4; Nakazawa, Kazuhiro3,4; Ono, Ko3; Yamada, Shin'ya5; Xu, Haiguang6,7
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2016-06-01 |
| 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 | 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 x 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 similar to 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 similar to 1.4 and a larger coronal optical depth of similar to 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. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000377410000062 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32801]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Zhang, Zhongli |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.RIKEN, Inst Phys & Chem Res, MAXI Team, 2-1 Hirosawa, Wako, Saitama 3510198, Japan 3.Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan 4.Univ Tokyo, Res Ctr Early Universe, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan 5.Tokyo Metropolitan Univ, Dept Phys, Minami Osawa 1-1, Hachioji, Tokyo 1920397, Japan 6.Shanghai Jiao Tong Univ, Dept Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 7.Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, 800 Dongchuan Rd, Shanghai 200240, Peoples R 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]. 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.ASTROPHYSICAL JOURNAL,823(2). |
| MLA | Zhang, Zhongli,et al."SUZAKU OBSERVATION OF THE HIGH-INCLINATION BINARY EXO 0748-676 IN THE HARD STATE".ASTROPHYSICAL JOURNAL 823.2(2016). |
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来源：上海天文台
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