The Evolution of the Broadband Temporal Features Observed in the Black-hole Transient MAXI J1820+070 with Insight-HXMT
文献类型：期刊论文
| 作者 | Wang,Yanan7; Ji,Long8; Zhang,S. N.9,10; Méndez,Mariano11; Qu,J. L.9,10; Maggi,Pierre7; Ge,M. Y.9; Qiao,Erlin1 ; Tao,L.9; Zhang,S.9
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2020-06-01 |
| 卷号 | 896期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Black holes Compact objects Low-mass x-ray binary stars |
| DOI | 10.3847/1538-4357/ab8db4 |
| 英文摘要 | Abstract We study the evolution of the temporal properties of MAXI?J1820+070 during the 2018 outburst in its hard state from MJD?58,190 to 58,289 with Insight-HXMT in a broad energy band 1–150 keV. We find different behaviors of the hardness ratio, the fractional rms and time lag before and after MJD?58,257, suggesting a transition occurred around this point. The observed time lags between the soft photons in the 1–5 keV band and the hard photons in higher energy bands, up to 150 keV, are frequency-dependent: the time lags in the low-frequency range, 2–10?mHz, are both soft and hard lags with a timescale of dozens of seconds but without a clear trend along the outburst; the time lags in the high-frequency range, 1–10?Hz, are only hard lags with a timescale of tens of milliseconds; they first increase until around MJD?58,257 and decrease after this date. The high-frequency time lags are significantly correlated to the photon index derived from the fit to the quasi-simultaneous NICER spectrum in the 1–10 keV band. This result is qualitatively consistent with a model in which the high-frequency time lags are produced by Comptonization in a jet. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-896-1-AB8DB4 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63495]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 2.Physics & Astronomy, University of Southampton, Southampton, Hampshire SO17 1BJ, UK 3.Department of Astronomy, Tsinghua University, Beijing 100084, People’s Republic of China 4.Department of Engineering Physics, Tsinghua University, Beijing 100084, People’s Republic of China 5.Istanbul University, Science Faculty, Department of Astronomy and Space Sciences, Beyaz?t, 34119, Istanbul, Turkey 6.Department of Astronomy, Beijing Normal University, Beijing 100088, People’s Republic of China 7.Université de Strasbourg, CNRS, Observatoire astronomique de Strasbourg, UMR 7550, F-67000 Strasbourg, France; yanan.wang@astro.unistra.fr 8.Institut für Astronomie und Astrophysik, Kepler Center for Astro and Particle Physics, Eberhard Karls Universit?t, Sand 1, D-72076 Tübingen, Germany 9.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People’s Republic of China 10.University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Wang,Yanan,Ji,Long,Zhang,S. N.,et al. The Evolution of the Broadband Temporal Features Observed in the Black-hole Transient MAXI J1820+070 with Insight-HXMT[J]. The Astrophysical Journal,2020,896(1). |
| APA | Wang,Yanan.,Ji,Long.,Zhang,S. N..,Méndez,Mariano.,Qu,J. L..,...&Wang,Lingjun.(2020).The Evolution of the Broadband Temporal Features Observed in the Black-hole Transient MAXI J1820+070 with Insight-HXMT.The Astrophysical Journal,896(1). |
| MLA | Wang,Yanan,et al."The Evolution of the Broadband Temporal Features Observed in the Black-hole Transient MAXI J1820+070 with Insight-HXMT".The Astrophysical Journal 896.1(2020). |
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来源：国家天文台
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