Insight-HXMT observations of thermonuclear X-ray bursts in 4U 1636-53

doi:10.1093/mnras/stae283

	Insight-HXMT observations of thermonuclear X-ray bursts in 4U 1636-53
	Yan Z(颜哲)1,3,4; Zhang GB(张国宝)3,4; Chen, Yu-Peng 1; Zhang, Shu 1; Mendez, Mariano 5; Peng, Jingqiang 1,4; Zhang, Shuang-Nan 1; Qu, Jinlu 1; Lyu, Ming 2,6; Mao JR(毛基荣)3
刊名	Monthly Notices of the Royal Astronomical Society
	2024-04-01
卷号	529 期号:2 页码:1585-1596
关键词	stars: individual: 4U 1636−53 stars: neutron X-rays: binaries X-rays: bursts
ISSN号	0035-8711
DOI	10.1093/mnras/stae283
产权排序	第1完成单位
文献子类	Journal article (JA)
英文摘要	We conducted an analysis of 45 bursts observed from 4U 1636-53. To investigate the mechanism behind the light-curve profiles and the impact of thermonuclear X-ray bursts on the accretion environment in accreting neutron star low-mass X-ray binaries. This analysis employed both light-curve and time-resolved spectroscopy methodologies, with data collected by the Insight-Hard X-ray Modulation Telescope instrument. We found that 30 bursts exhibited similar light-curve profiles and were predominantly in the hard state, and two photospheric radius expansion (PRE) bursts were in the soft state. The light curves of most bursts did not follow a single exponential decay but displayed a dual-exponential behaviour. The initial exponent had a duration of approximately 6 s. We utilized both the standard method and the 'fa' method to fit the burst spectra. The majority of the 'fa' values exceeded 1, indicating an enhancement of the persistent emission during the burst. Under the two Comptonization components assumption, we suggest that the scattering of burst photons by the inner corona may mainly contribute to the persistent emission enhancement. We also observed an inverse correlation between the maximum fa and the persistent emission flux in the non-PRE burst. This anticorrelation suggests that when the accretion rate is lower, there is a greater enhancement of persistent emission during the burst peak. The prediction based on Poynting-Robertson drag (P-R drag) aligns with this observed anticorrelation. © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
学科主题	天文学
URL标识	查看原文
资助项目	National Natural Science Foundation of China[12393813];National Natural Science Foundation of China[U1838116]
语种	英语
资助机构	National Natural Science Foundation of China[12393813, U1838116]
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/26561]
专题	云南天文台_高能天体物理研究组
作者单位	1.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 2.Key Laboratory of Stars and Interstellar Medium, Xiangtan University, Xiangtan, Hunan, 411105, China 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, China; 4.University of Chinese Academy of Science, Chinese Academy of Science, Beijing, 100049, China; 5.Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, Groningen, NL-9700 AV, Netherlands; 6.Department of Physics, Xiangtan University, Xiangtan, Hunan, 411105, China;
推荐引用方式 GB/T 7714	Yan Z,Zhang GB,Chen, Yu-Peng,et al. Insight-HXMT observations of thermonuclear X-ray bursts in 4U 1636-53[J]. Monthly Notices of the Royal Astronomical Society,2024,529(2):1585-1596.
APA	颜哲.,张国宝.,Chen, Yu-Peng.,Zhang, Shu.,Mendez, Mariano.,...&王建成.(2024).Insight-HXMT observations of thermonuclear X-ray bursts in 4U 1636-53.Monthly Notices of the Royal Astronomical Society,529(2),1585-1596.
MLA	颜哲,et al."Insight-HXMT observations of thermonuclear X-ray bursts in 4U 1636-53".Monthly Notices of the Royal Astronomical Society 529.2(2024):1585-1596.