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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Combined spectral and timing analysis of the black hole candidate MAXI J1659-152, discovered by MAXI and Swift
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Combined spectral and timing analysis of the black hole candidate MAXI J1659-152, discovered by MAXI and Swift

机译：MAXI和Swift发现的黑洞候选MAXI J1659-152的频谱和时序分析相结合

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摘要

We report on X-ray spectral and timing results of a new black hole candidate (BHC), MAXI J1659-152, with an orbital period of 2.41 hr (shortest among BHCs) in a 2010 outburst from 65 Rossi X-ray Timing Explorer (RXTE) observations and 8 simultaneous Swift and RXTE observations. According to the definitions of the spectral states in Remillard and McClintock (2006, ARA&A, 44, 49), most of the observations have been classified into the intermediate state. All of the X-ray broadband spectra can be modeled by a multi-color disk plus a power-law with an exponential cutoff or a multi-color disk plus a Comptonization component. During the initial phase of the outburst, a high-energy cutoff was visible at 30-40 keV. The innermost radius of the disk gradually decreased by a factor of more than 3 from the onset of the outburst, and reached a constant value of 35 d _(10)cos i ~(-1/2) km, where d 10 is the distance in units of 10 kpc and i is the inclination. The type-C quasi-periodic oscillation (QPO) frequency varied from 1.6Hz to 7.3Hz in association with a change of the innermost radius, while the innermost radius remained constant during the type-B QPO detections at 1.6-4.1Hz. Hence, we suggest that the origin of the type-B QPOs is different from that of type-C QPOs, the latter of which would originate from the disk truncation radius. Assuming the constant innermost radius in the latter phase of the outburst as the innermost stable circular orbit, the black hole mass in MAXI J1659-152 is estimated to be 3.6-8.0M ⊙ for a distance of 5.3-8.6 kpc and an inclination angle of 60°-75°.
机译：我们报告了一种新的黑洞候选者（BHC）MAXI J1659-152的X射线光谱和定时结果，该轨道周期为2.41 hr（BHC中最短），在2010年由65 Rossi X射线定时探测仪爆发（ RXTE）观测值以及8个同时进行的Swift和RXTE观测值。根据Remillard和McClintock（2006，ARA＆A，44，49）中光谱状态的定义，大多数观测值已被分类为中间状态。所有的X射线宽带光谱都可以通过多色光盘加上具有指数截止的幂律或多色光盘加上Comptonization组件来建模。在爆发的初始阶段，在30-40 keV处可见高能截止。从爆发开始，盘的最内半径逐渐减小超过3倍，并达到恒定值35 d _（10）cos i〜（-1/2）km，其中d 10是距离，单位为10 kpc，i为倾斜度。 C型准周期振荡（QPO）频率随最内半径的变化而从1.6Hz变至7.3Hz，而在B型QPO检测期间，最内半径保持恒定，为1.6-4.1Hz。因此，我们建议B型QPO的起源与C型QPO的起源不同，后者的CPO起源于磁盘截断半径。假设爆发后期的最里面半径恒定，是最里面稳定的圆形轨道，则对于5.3-8.6 kpc的距离和倾斜角度，MAXI J1659-152中的黑洞质量估计为3.6-8.0M⊙。 60°-75°。

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