Evolution of hard X-ray spectra along the branches in Circinus X-1
文献类型：期刊论文
| 作者 | Ding GQ(丁国强); Qu JL(屈进禄) ; Li TB(李惕碚); Ding, GQ; Qu, JL; Li, TP
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2003 |
| 卷号 | 596期号:2页码:L219-L222 |
| 关键词 | binaries : general stars : individual (Circinus X-1) X-rays : binaries X-rays : general X-rays : individual (Circinus X-1) |
| 通讯作者 | Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, Beijing 100039, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China ; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China ; Tsing Hua Univ, Ctr Astrophys, Beijing 100084, Peoples R China |
| 英文摘要 | Using the data from the Proportional Counter Array and the High-Energy X-Ray Timing Experiment on board the Rossi X-Ray Timing Explorer satellite, we investigate the evolution of the 3-200 keV spectra of the peculiar low-mass X-ray binary Circinus X-1 along the branches on its hardness-intensity diagram (HID) from the vertical horizontal branch, through the horizontal horizontal branch and normal branch, to the flaring branch. We detect a power-law hard component in the spectra. It is found that the derived photon indices (Gamma) of the power-law hard component are correlated with the position on the HID. The power-law component dominates the X-ray emission of Cir X-1 in the energy band higher than similar to 20 keV. The fluxes of the power-law component are compared with those of the bremsstrahlung component in the spectra. A possible origin of the power-law hard component is discussed. |
| 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:000185916100024 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240262]  |
| 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 | Ding GQ,Qu JL,Li TB,et al. Evolution of hard X-ray spectra along the branches in Circinus X-1[J]. ASTROPHYSICAL JOURNAL,2003,596(2):L219-L222. |
| APA | 丁国强,屈进禄,李惕碚,Ding, GQ,Qu, JL,&Li, TP.(2003).Evolution of hard X-ray spectra along the branches in Circinus X-1.ASTROPHYSICAL JOURNAL,596(2),L219-L222. |
| MLA | 丁国强,et al."Evolution of hard X-ray spectra along the branches in Circinus X-1".ASTROPHYSICAL JOURNAL 596.2(2003):L219-L222. |
入库方式： OAI收割
来源：高能物理研究所
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