The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight -HXMT

doi:10.1093/mnras/stae686

	The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight -HXMT
	Jin P(靳沛)8,9; Zhang GB(张国宝)8,9; Zhang, Yuexin 6,7; Méndez, Mariano 7; Qu, Jinlu 5,8; Russell, David M.4; Wang JC(王建成)8,9; Zhang, Shuangnan 5,8; Yang, Yi-Jung 2,3; Jia, Shumei 5,8
刊名	Monthly Notices of the Royal Astronomical Society
	2024-05-01
卷号	530 期号:1 页码:929-946
关键词	accretion, accretion discs stars: black holes stars: individual: 4U 1543 − 47 X rays: binaries
ISSN号	0035-8711
DOI	10.1093/mnras/stae686
产权排序	第1完成单位
文献子类	Journal article (JA)
英文摘要	We present a detailed analysis of the observations with the Hard X-ray Modulation Telescope of the black hole X-ray transient 4U 1543-47 during its outburst in 2021. We find a clear state transition during the outburst decay of the source. Using previous measurements of the black hole mass and distance to the source, the source luminosity during this transition is close to the Eddington limit. The light curves before and after the transition can be fitted by two exponential functions with short ( ∼16 d) and long ( ∼130 d) decay time-scales, respectively. We detect strong reflection features in all observations that can be described with either the RELXILLNS or REFLIONX BB reflection models, both of which have a black-body incident spectrum. In the super- Eddington state, we observe a Comptonized component characterized by a low electron temperature of approximately 2.0 keV. We suggest that this component appears e xclusiv ely within the inner radiation-pressure-dominated region of the supercritical disc as a part of the intrinsic spectrum of the accretion disc itself. This feature vanishes as the source transitions into the sub- Eddington state. The emissivity index of the accretion disc in the reflection component is significantly different before and after the transition, ∼3.0-5.0 and ∼7.0-9.0 in the super- and sub-Eddington states, respectively. Based on the reflection geometry of returning disc radiation, the geometrically thicker the accretion disc, the smaller the emissivity index. Therefore, we propose that the transition is primarily driven by the change of the accretion flow from a supercritical to a thin disc configuration. © 2024 The Author(s).
学科主题	天文学 ; 星系与宇宙学 ; 天体物理学 ; 高能天体物理学
URL标识	查看原文
资助项目	N/A
语种	英语
资助机构	N/A
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/27099]
专题	云南天文台_高能天体物理研究组
作者单位	1.School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, 255000, China 2.Laboratory for Space Research, The University of Hong Kong, Hong Kong; 3.Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong; 4.Center for Astrophysics and Space Science (CASS), New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates; 5.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 6.Center for Astrophysics, Harvard & Smithsonian, 60 Garden St, Cambridge, MA, 02138, United States; 7.Kapteyn Astronomical Institute, University of Groningen, P.O. BOX 800, Groningen, NL-9700 AV, Netherlands; 8.University of Chinese Academy of Sciences, Beijing, 100049, China; 9.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China;
推荐引用方式 GB/T 7714	Jin P,Zhang GB,Zhang, Yuexin,et al. The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight -HXMT[J]. Monthly Notices of the Royal Astronomical Society,2024,530(1):929-946.
APA	靳沛.,张国宝.,Zhang, Yuexin.,Méndez, Mariano.,Qu, Jinlu.,...&Liu, Hexin.(2024).The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight -HXMT.Monthly Notices of the Royal Astronomical Society,530(1),929-946.
MLA	靳沛,et al."The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight -HXMT".Monthly Notices of the Royal Astronomical Society 530.1(2024):929-946.