| XTE J1550-564 2001年“迷你爆发”的X射线能谱研究 |
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| 引用本文： | 葛康,董爱军,刘畅,支启军.XTE J1550-564 2001年“迷你爆发”的X射线能谱研究[J].天文学报,2021,62(4):35. |
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| 作者姓名： | 葛康 董爱军 刘畅 支启军 |
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| 作者单位： | 贵州师范大学物理与电子科学学院 贵阳 550001;贵州师范大学贵州射电天文数据处理重点实验室 贵阳 550001 |
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| 基金项目： | 国家自然科学基金项目(U1831120、U1731238), 贵州省科学技术基金项目([2019]1241、\lk [2017][2017]7349)资助 |
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| 摘 要： | 黑洞X射线暂现源的迷你爆发是一类峰值光度较低、持续时间较短的爆发.由于观测数据较少,其物理机制仍不清楚.利用RXTE (Rossi X-ray Timing Explorer)卫星从2001年1月28日到3月14日的数据,研究了黑洞X射线暂现源XTE J1550–564 2001年迷你爆发的X射线能谱特性.发现在本次迷你爆发中, XTE J1550–564的X射线能谱可以用幂律谱很好地拟合.整个爆发的硬度强度图不是标准的q型,而是一直保持在最右侧.此外,还分析了此次爆发谱指数Γ与未吸收的2–10 keV能段的X射线流量F_(2–10 keV)的相关性,发现Γ-F_(2–10 keV)呈反相关关系,且谱指数Γ∈1.35, 1.72].上述结果表明2001年这次爆发一直处于低/硬态,它的X射线辐射主要来自于辐射低效的吸积模式,如ADAF(Advection-Dominated Accretion Flow).
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| 关 键 词： | 恒星: 黑洞 X射线: 个别: XTE J1550--564 黑洞物理 吸积 |
| 收稿时间： | 2020/10/9 0:00:00 |
X-ray Energy Spectra Study of Mini-outburst of XTE J1550--564 in 2001 |
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| GE Kang,DONG Ai-jun,LIU Chang,ZHI Qi-jun.X-ray Energy Spectra Study of Mini-outburst of XTE J1550--564 in 2001[J].Acta Astronomica Sinica,2021,62(4):35. |
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| Authors: | GE Kang DONG Ai-jun LIU Chang ZHI Qi-jun |
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| Institution: | School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001;Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang 550001 |
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| Abstract: | The mini-outbursts of the black hole X-ray transients are a kind of outburst with low peak luminosity and short duration. Due to the lack of observational data, the physical mechanism is still unclear. Using data from RXTE (Rossi X-Ray Timing Explore) satellite from January 28 to March 14, 2001, we studied the X-ray energy spectrum characteristics in the mini-outburst from X-ray transient XTE J1550--564 of the black hole. It was found that the X-ray energy spectrum of XTE J1550--564 in this mini-outburst could be well fitted with a power law spectrum. The evolution of the hardness-intensity diagram throughout the outburst is not a canonical ``q-track pattern'', but lies on the far right. In addition, we also analyzed the correlation between X-ray photon index T and unabsorbed 2- 10 keV X-ray fux F2- 10keV, and found that there is an anti-correlation between T and F2 10keV. Meanwhile, the photon index T is 1.35 to 1.72. Our results suggest that the outburst in 2001 has been in a low/hard state, its X-ray radiation mainly comes from the low-efficient accretion mode, such as ADAF (Advection-Dominated Accretion Flow). |
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| Keywords: | stars: black holes X-rays: individual: XTE J1550--564 black hole physics accretion |
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