Effect of non-stationary accretion on spectral state transitions: An example of a persistent neutron star LMXB 4U 1636-536

doi:10.1088/1674-4527/18/3/33

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	Effect of non-stationary accretion on spectral state transitions: An example of a persistent neutron star LMXB 4U 1636-536
	Zhang, Hui; Yu, Wen-Fei
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2018-03-01
卷号	18 期号:3
关键词	Accretion, Accretion Disks X-rays: Binaries Stars: Neutron
ISSN号	1674-4527
DOI	10.1088/1674-4527/18/3/33
英文摘要	Observations of black hole and neutron star X-ray binaries show that the luminosity of the hard-to-soft state transition is usually higher than that of the soft-to-hard state transition, indicating additional parameters other than mass accretion rate are required to interpret spectral state transitions. It has been found in some individual black hole or neutron star soft X-ray transients that the luminosity corresponding to the hard-to-soft state transition is positively correlated with the peak luminosity of the following soft state. In this work, we report the discovery of the same correlation in the single persistent neutron star low mass X-ray binary (LMXB) 4U 1636-536 based on data from the All Sky Monitor (ASM) on board RXTE, the Gas Slit Camera (GSC) on board MAXI and the Burst Alert Telescope (BAT) on board Swift. We also found such a positive correlation holds in this persistent neutron star LMXB in a luminosity range spanning about a factor of four. Our results indicate that non-stationary accretion also plays an important role in driving X-ray spectral state transitions in persistent accreting systems with small accretion flares, which is much less dramatic compared with the bright outbursts seen in many Galactic LMXB transients.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000428268500009
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32505]
专题	中国科学院上海天文台
通讯作者	Zhang, Hui
作者单位	Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hui,Yu, Wen-Fei. Effect of non-stationary accretion on spectral state transitions: An example of a persistent neutron star LMXB 4U 1636-536[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(3).
APA	Zhang, Hui,&Yu, Wen-Fei.(2018).Effect of non-stationary accretion on spectral state transitions: An example of a persistent neutron star LMXB 4U 1636-536.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(3).
MLA	Zhang, Hui,et al."Effect of non-stationary accretion on spectral state transitions: An example of a persistent neutron star LMXB 4U 1636-536".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.3(2018).