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The time lag of high-energy photons of Cyg X-1 in hard state
Qu JL(屈进禄); Li TB(李惕碚); Qu, JL; Li, TP
2001
发表期刊CHINESE ASTRONOMY AND ASTROPHYSICS
卷号25期号:4页码:416-424
通讯作者Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China ; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
摘要The time lag between hard and soft X-rays is an important aspect of the study of high-energy emission. Fourier cross spectrum, often used in calculating the time lag, is unable to measure statistically significant fast light variation above Fourier frequency 30 Hz from the measurements of Cyg X-1. The method of cross correlation function in time domain, developed by Li Ti-pei, can be effectively used in measuring time lags on different time scales. Using Li's method we discuss the properties of the time lag of high-energy photons of Cyg X-1 in hard state at different times. The results show that there is a significant time lap on short times scales (< 0.1 s). We confront different models of hard-state Cygnus X-1 with the observed time lag.
文章类型Article
关键词X-ray binary fast light variation Cyg X-1
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
DOI10.1016/S0275-1062(01)00094-7
URL查看原文
语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000172661300004
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237384
专题院士
粒子天体物理中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Qu JL,Li TB,Qu, JL,et al. The time lag of high-energy photons of Cyg X-1 in hard state[J]. CHINESE ASTRONOMY AND ASTROPHYSICS,2001,25(4):416-424.
APA 屈进禄,李惕碚,Qu, JL,&Li, TP.(2001).The time lag of high-energy photons of Cyg X-1 in hard state.CHINESE ASTRONOMY AND ASTROPHYSICS,25(4),416-424.
MLA 屈进禄,et al."The time lag of high-energy photons of Cyg X-1 in hard state".CHINESE ASTRONOMY AND ASTROPHYSICS 25.4(2001):416-424.
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