X-ray spectral variability in Cygnus X-1
文献类型：期刊论文
| 作者 | Liu, CZ ; Li TB(李惕碚); Li, TP
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2004 |
| 卷号 | 611期号:2页码:1084-1090 |
| 关键词 | accretion, accretion disks black hole physics stars : individual (Cygnus X-1) X-rays : stars |
| 通讯作者 | Tsing Hua Univ, Dept Engn Phys, Beijing 100084, Peoples R China ; Tsing Hua Univ, Ctr Astrophys, Beijing 100084, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Particle Astrophys Lab, Beijing, Peoples R China |
| 英文摘要 | Spectral variability in different energy bands of X-rays from Cyg X-1 in different states is studied with Rossi X-Ray Timing Explorer (RXTE) observations and time-domain approaches. In the hard tail of the energy spectrum above similar to10 keV, average peak-aligned shots are softer than the average steady emission and the hardness ratio decreases when the flux increases during a shot for all states. With regard to a soft band below similar to10 keV, the hardness in the soft state varies in an opposite manner: it peaks when the flux of the shot peaks. For the hard and transition states, the hardness ratio with respect to a soft band during a shot is in general lower than that of the steady component, and a sharp rise is observed at about the shot peak. For the soft state, the correlation coefficient between the intensity and hardness ratio in the hard tail is negative and decreases monotonically as the timescale increases from 0.01 to 50 s, which is opposite to the behavior in a soft band. For the hard and transition states, the correlation coefficients are in general negative and have a trend of decreasing with increasing timescale. |
| 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:000223403400040 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239019]  |
| 专题 | 高能物理研究所_院士 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 | Liu, CZ,Li TB,Li, TP. X-ray spectral variability in Cygnus X-1[J]. ASTROPHYSICAL JOURNAL,2004,611(2):1084-1090. |
| APA | Liu, CZ,李惕碚,&Li, TP.(2004).X-ray spectral variability in Cygnus X-1.ASTROPHYSICAL JOURNAL,611(2),1084-1090. |
| MLA | Liu, CZ,et al."X-ray spectral variability in Cygnus X-1".ASTROPHYSICAL JOURNAL 611.2(2004):1084-1090. |
入库方式： OAI收割
来源：高能物理研究所
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