X-ray spectroscopy of dips of Cir X-1
文献类型：期刊论文
| 作者 | Lei YJ(雷亚娟); Lu FJ(卢方军) ; Qu JL(屈进禄); Song LM(宋黎明); Lei, YJ; Lu, FJ; Qu, JL; Song, LM; Zhang, CM
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| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2007 |
| 卷号 | 7期号:5页码:693-704 |
| 关键词 | stars : individual (Circinus X-1) stars : neutron X-rays : stars |
| 通讯作者 | Chinese Acad Sci, Inst High Energy Phys, Lab Particle Astrophys, Beijing 100049, Peoples R China ; Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 英文摘要 | We present X-ray spectral analyses of the low-mass X-ray binary Cir X-1 during X-ray dips, using the Rossi X-ray Timing Explorer (RXTE) data. Each dip was divided into several segments, and the spectrum of each segment was fitted with a three-component blackbody model, in which the first two components are affected by partial covering and the third one is unaffected. A Gaussian emission line is also included in the spectral model to represent the Fe K alpha line at similar to 6.4keV. The fitted temperatures of the two partially covered components are about 2 keV and I keV, while the uncovered component has a temperature of similar to 0.5-0.6keV. The equivalent blackbody emission radius of the hottest component is the smallest and that of the coolest component is the largest. During the dips the fluxes of the two hot components are linearly correlated, while that of the third component does not show any significant variation. The Fe line flux remains constant, within the errors, during the short dips. However, during the long dips the line flux varies significantly and is positively correlated with the fluxes of the two hot components. These results suggest: (1) that the temperature of the X-ray emitting region decreases with radius, (2) that the Fe Ka line emitting region is close to the hot continuum emitting region, and (3) that the size of the Fe line emitting region is larger than that of the obscuring matter causing the short dips but smaller than the region of that causing the long dips. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000250426300010 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/238287]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Lei YJ,Lu FJ,Qu JL,et al. X-ray spectroscopy of dips of Cir X-1[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2007,7(5):693-704. |
| APA | 雷亚娟.,卢方军.,屈进禄.,宋黎明.,Lei, YJ.,...&Zhang, CM.(2007).X-ray spectroscopy of dips of Cir X-1.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,7(5),693-704. |
| MLA | 雷亚娟,et al."X-ray spectroscopy of dips of Cir X-1".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 7.5(2007):693-704. |
入库方式： OAI收割
来源：高能物理研究所
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