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Dependence of kilohertz quasi-periodic oscillation properties on the normal-branch oscillation phase in Scorpius X-1
Yu WF(余文飞); Yu, WF; van der Klis, M; Jonker, PG
2001
发表期刊ASTROPHYSICAL JOURNAL
卷号559期号:1页码:L29-L32
通讯作者Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands ; Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands ; Inst High Energy Phys, Lab Cosm Ray & High Energy Astrophys, Beijing 100039, Peoples R China
文章类型Article
摘要We analyzed Rossi X-Ray Timing Explorer data of Scorpius X-1, which show kilohertz quasi-periodic oscillations (QPOs) and the similar to6-8 Hz. normal-branch oscillation (NBO) simultaneously. Using power spectra of 0.03-0.5 s data segments, we find that both the upper kilohertz QPO frequency nu (2) and the ratio of lower to upper kilohertz QPO amplitude are anticorrelated to variations in the X-ray count rate taking place on the NBO timescale. The frequency dependence is similar to (but probably weaker than) that found on longer timescales, but the power ratio dependence is opposite to it. A model where radiative stresses on the disk material, modulated at the NBO frequency, lead to changes in nu (2) can explain the data; this implies that some of the NBO flux changes originate from inside the inner disk radius. We discuss how these findings affect our understanding of kilohertz QPOs and of the low-frequency variability of low-mass X-ray binaries.
关键词accretion, accretion disks stars : individual (Scorpius X-1) stars : neutron X-rays : stars
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/323741
URL查看原文
语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000171371400008
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被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240267
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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Yu WF,Yu, WF,van der Klis, M,et al. Dependence of kilohertz quasi-periodic oscillation properties on the normal-branch oscillation phase in Scorpius X-1[J]. ASTROPHYSICAL JOURNAL,2001,559(1):L29-L32.
APA 余文飞,Yu, WF,van der Klis, M,&Jonker, PG.(2001).Dependence of kilohertz quasi-periodic oscillation properties on the normal-branch oscillation phase in Scorpius X-1.ASTROPHYSICAL JOURNAL,559(1),L29-L32.
MLA 余文飞,et al."Dependence of kilohertz quasi-periodic oscillation properties on the normal-branch oscillation phase in Scorpius X-1".ASTROPHYSICAL JOURNAL 559.1(2001):L29-L32.
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