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arXiv 1806.07147astro-ph.HE
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MAXI J1535-571的X射线性质演化:用TCAF溶液分析

Evolution of X-Ray Properties of MAXI J1535-571: Analysis with the TCAF Solution

J. -R. Shang, D. Debnath, D. Chatterjee, A. Jana, S. K. Chakrabarti, H. -K. Chang, Y. -X. Yap, C. -L. Chiu

摘要:

我们提出了新发现的X射线瞬态源,MAXI J1535-571,这被认为是一个银河系X射线二进制包含一个黑洞候选人(BHC)作为主要对象的光谱和定时特性。在2017年9月2日发现后,它一直由多颗卫星在多波段进行定期监测。我们使用档案数据的雨燕(XRT和BAT)和MAXI(GSC)卫星仪器研究吸积流动力学的爆发过程中的源。在爆发期间,该源在天空中变得非常明亮,在$2-10$ ~keV GSC波段观测到最大通量$5$ ~Crab。与其他瞬变BHC类似,它在爆发期间也显示出低频准周期振荡(QPO)特征。利用基于跨音速流解的双组分平流模型拟合文件对不同仪器的光谱数据进行拟合,得到直接吸积流参数。从模型拟合的物理流参数和QPO的性质来理解光谱态及其跃迁的演化。我们还估计可能的质量黑洞从我们的光谱分析为$7.9-9.9~M_\odot$或$8.9\pm1.0~M_\odot$。

英文摘要:

We present spectral and timing properties of the newly discovered X-ray transient source, MAXI J1535-571, which is believed to be a Galactic X-ray binary containing a black hole candidate (BHC) as the primary object. After its discovery on 2017 Sep. 2, it has been monitored regularly in multi-wavelength bands by several satellites. We use archival data of Swift (XRT and BAT) and MAXI (GSC) satellite instruments to study accretion flow dynamics of the source during the outburst. During its outburst, the source became very bright in the sky with a maximum observed flux of $5$~Crab in the $2-10$~keV GSC band. Similar to other transient BHCs, it also shows signatures of low frequency quasi-periodic oscillations (QPOs) during the outburst. Spectral data of different instruments are fitted with the transonic flow solution based two-component advective flow (TCAF) model fits file to find the direct accretion flow parameters. Evolution of spectral states and their transitions are understood from the model fitted physical flow parameters and nature of QPOs. We also estimate probable mass of the black hole from our spectral analysis as $7.9-9.9~M_\odot$ or $8.9\pm1.0~M_\odot$.

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