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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来源：上海天文台
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