The spectral-timing analysis of Cygnus X-1 with Insight-HXMT
文献类型：期刊论文
| 作者 | Zhou, M ; Grinberg, V; Bu, QC; Santangelo, A; Cangemi, F; Diez, CM; Konig, O; Ji, L; Nowak, MA; Pottschmidt, K
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2022 |
| 卷号 | 666页码:A172 |
| ISSN号 | 0004-6361 |
| 关键词 | X-rays binaries accretion accretion disks X-rays individuals Cygnus X-1 stars black holes |
| DOI | 10.1051/0004-6361/202244240 |
| 文献子类 | Article |
| 英文摘要 | Cygnus X-1, as the first discovered black hole binary, is a key source for understanding the mechanisms of state transitions and the scenarios of accretion in extreme gravity fields. We present a spectral-timing analysis of observations taken with the Insight-Hard X-ray Modulation Telescope (HXMT) mission, focusing on the spectral-state-dependent timing properties in the broad energy range of 1-150 keV, thus extending previous studies based on Rossi X-ray Timing Explorer (RXTE) to both lower and higher energies. Our main results are the following: (a) We successfully use a simple empirical model to fit all spectra, confirming that the reflection component is stronger in the soft state than in the hard state. (b) The evolution of the total fractional root mean square (rms) depends on the selected energy band and the spectral shape, which is a direct result of the evolution of the power spectral densities (PSDs). (c) In the hard/intermediate state, we see clear short-term variability features and a positive correlation between the central frequencies of the variability components and the soft photon index Gamma(1), which we also see at energies above 15 keV. In the soft state, the power spectrum is instead dominated by red noise. These behaviors can be traced to at least 90 keV. (d) Finally, the coherence and the phase-lag spectra show different behaviors, depending on the different spectral shapes. |
| 电子版国际标准刊号 | 1432-0746 |
| 语种 | 英语 |
| WOS记录号 | WOS:000870824900010 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299231]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_管理与技术支持 硬X射线调制望远镜卫星 |
| 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 | Zhou, M,Grinberg, V,Bu, QC,et al. The spectral-timing analysis of Cygnus X-1 with Insight-HXMT[J]. ASTRONOMY & ASTROPHYSICS,2022,666:A172. |
| APA | Zhou, M.,Grinberg, V.,Bu, QC.,Santangelo, A.,Cangemi, F.,...&Zhang, SN.(2022).The spectral-timing analysis of Cygnus X-1 with Insight-HXMT.ASTRONOMY & ASTROPHYSICS,666,A172. |
| MLA | Zhou, M,et al."The spectral-timing analysis of Cygnus X-1 with Insight-HXMT".ASTRONOMY & ASTROPHYSICS 666(2022):A172. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。