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arXiv 2001.06859astro-ph.HE
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MAXI J1659 -152黑洞的逆行旋转

A retrograde spin of the black hole in MAXI J1659--152

Sandeep K. Rout, Santosh Vadawale, Mariano Méndez

摘要:

我们提出了银河系黑洞双星MAXI J1659- 152的光谱分析的结果,在爆发的上升阶段,持续了约65天,从2010年9月25日开始。通过蒙特卡罗模拟验证的宽Fe线的存在,以及利用XMM-牛顿/EPIC-pn和RXTE/PCA的组合光谱能力覆盖宽能带,使我们能够使用反射光谱和连续拟合方法的组合来估计黑洞的自旋。我们探讨了目前黑洞质量,倾角,距离以及吸积率的不确定性所允许的整个参数范围。我们表明,约95%的参数空间和非常合理的上限质量吸积率,自旋的黑洞必须是负的。这是第一次在银河系黑洞双星中明确检测到负自旋。

英文摘要:

We present the results of spectral analysis of the galactic black-hole binary MAXI J1659--152 in the rising phase of the outburst that lasted for about 65 days starting on 2010 September 25. The presence of a broad Fe line, verified by Monte-Carlo simulations, and coverage of a wide energy band by utilizing the combined spectral capabilities of XMM-Newton/EPIC-pn and RXTE/PCA allowed us to use a combination of reflection spectroscopy and continuum fitting methods to estimate the spin of the black hole. We explored the entire parameter range allowed by the present uncertainties on black-hole mass, inclination, and distance as well as the accretion rate. We show that for about 95 percentage of parameter space and very reasonable upper limits on mass accretion rate, the spin of the black hole has to be negative. This is the first clear detection of negative spin in a galactic black-hole binary.

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