中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The correlation timescale of the X-ray flux during the outbursts of soft X-ray transients

文献类型:期刊论文

作者Wu YuXiang1,2,3; Yu WenFei1; Li TiPei2,3
刊名SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
出版日期2010
卷号53期号:1页码:161-167
关键词accretion disks black hole physics star: individual (Aquila X-1 GX 339-4 4U 1705-44)
英文摘要Recent studies of black hole and neutron star low mass X-ray binaries (LMXBs) show a positive correlation between the X-ray flux at which the low/hard(LH)-to-high/soft(HS) state transition occurs and the peak flux of the following HS state. By analyzing the data from the All Sky Monitor (ASM) onboard the Rossi X-ray Timing Explorer (RXTE), we show that the HS state flux after the source reaches its HS flux peak still correlates with the transition flux during soft X-ray transient (SXT) outbursts. By studying large outbursts or flares of GX 339-4, Aql X-1 and 4U 1705-44, we have found that the correlation holds up to 250, 40, and 50 d after the LH-to-HS state transition, respectively. These time scales correspond to the viscous time scale in a standard accretion disk around a stellar mass black hole or a neutron star at a radius of similar to 10(4) (5) R(g), indicating that the mass accretion rates in the accretion flow either correlate over a large range of radii at a given time or correlate over a long period of time at a given radius. If the accretion geometry is a two-flow geometry composed of a sub-Keplerian inflow or outflow and a disk flow in the LH state, the disk flow with a radius up to similar to 10(5) R(g) would have contributed to the nearly instantaneous non-thermal radiation directly or indirectly, and therefore affects the time when the state transition occurs.
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Physics, Multidisciplinary
研究领域[WOS]Physics
关键词[WOS]BLACK-HOLE ; DOMINATED ACCRETION ; GRS 1758-258 ; 2 PATTERNS ; BINARIES ; MASS ; BEHAVIOR ; LUMINOSITY ; GX-339-4 ; STATES
收录类别SCI
语种英语
WOS记录号WOS:000280291800038
公开日期2011-06-29
源URL[http://119.78.226.72//handle/331011/13407]  
专题上海天文台_星系宇宙学重点实验室
作者单位1.Shanghai Astron Observ, Shanghai 100012, Peoples R China
2.Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
3.Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714
Wu YuXiang,Yu WenFei,Li TiPei. The correlation timescale of the X-ray flux during the outbursts of soft X-ray transients[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(1):161-167.
APA Wu YuXiang,Yu WenFei,&Li TiPei.(2010).The correlation timescale of the X-ray flux during the outbursts of soft X-ray transients.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(1),161-167.
MLA Wu YuXiang,et al."The correlation timescale of the X-ray flux during the outbursts of soft X-ray transients".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.1(2010):161-167.

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