THE PROPERTIES OF CROSS-CORRELATION AND SPECTRA OF THE LOW-MASS X-RAY BINARY 4U 1608-52

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	THE PROPERTIES OF CROSS-CORRELATION AND SPECTRA OF THE LOW-MASS X-RAY BINARY 4U 1608-52
	Lei, YJ; Zhang S(张澍); 屈进禄;Zhang, S; Qu, JL; Yuan, HL; Wang, YN; Dong, YQ; Zhang, HT; Li, ZB; Zhang, CM
刊名	ASTRONOMICAL JOURNAL
	2014
卷号	147 期号:3 页码:67
关键词	accretion binaries: close stars: individual (4U 1608-52) X-rays: binaries accretion disks
英文摘要	With RXTE data, we analyzed the cross-correlation function between the soft and hard X-rays of the transient atoll source 4U 1608-52. We found anti-correlations in three outbursts occurred in 1998, 2002, and 2010, and we found significant time lags of several hundreds of seconds in the latter two outbursts. Our results show no correlation between the soft and hard X-rays in the extreme island state and a dominated positive correlation in the lower banana state. Anti-correlations are presented at the upper banana state for the outburst of 2010 and at the island and the lower left banana states for the other two outbursts. So far for atoll sources, the cross-correlation has been studied statistically only for 4U 1735-44, where anti-correlations showed up in the upper banana state. Here our investigation on 4U 1608-52 provides a similar result in its 2010 outburst. In addition, we notice that the luminosities in the upper banana of the 1998 and 2002 outbursts are about 1.5 times that of the 2010 outburst whose luminosity in the upper banana is close to that of 4U 1735-44. The results suggest that the states in the color-color diagram of a source could be correlated with the luminosity of the source. A further spectral analysis during the 2010 outburst is also shown, which suggests that the disk can be a little truncated in the upper banana. The feature on the upper banana is similar to the previous results of the flaring branch in Z sources.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000331125600022
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224833]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Lei, YJ,Zhang S,屈进禄；Zhang, S,et al. THE PROPERTIES OF CROSS-CORRELATION AND SPECTRA OF THE LOW-MASS X-RAY BINARY 4U 1608-52[J]. ASTRONOMICAL JOURNAL,2014,147(3):67.
APA	Lei, YJ.,张澍.,屈进禄；Zhang, S.,Qu, JL.,Yuan, HL.,...&Zhao, YH.(2014).THE PROPERTIES OF CROSS-CORRELATION AND SPECTRA OF THE LOW-MASS X-RAY BINARY 4U 1608-52.ASTRONOMICAL JOURNAL,147(3),67.
MLA	Lei, YJ,et al."THE PROPERTIES OF CROSS-CORRELATION AND SPECTRA OF THE LOW-MASS X-RAY BINARY 4U 1608-52".ASTRONOMICAL JOURNAL 147.3(2014):67.