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arXiv 1012.4330astro-ph.HE
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MAXI J1659-152作为黑洞候选者的确认

The identification of MAXI J1659-152 as a black hole candidate

M. Kalamkar, J. Homan, D. Altamirano, M. van der Klis, P. Casella, M. Linares

摘要:

我们报告了最近发现的软X射线瞬态MAXI J1659-152(最初称为GRB 100925 A)的所有65个点的罗西X射线定时探测器观测的分析。通过硬度-强度图(HID)以及其X射线变异特性,研究了该源的演变。MAXI J1659-152在HID中描绘出一个逆时针循环,这在瞬态低质量X射线双星中很常见。源的可变性,特别是B型和C型低频准周期振荡的检测,以及它们沿着HID轨道演化的方式,表明MAXI J1659-152是一个黑洞候选者。MAXI J1659-152的光谱和变化特性表明,在RXTE观测期间,在硬中间态和软中间态下观察到了源,在这两种状态之间有几次跃迁。

英文摘要:

We report on the analysis of all 65 pointed Rossi X-ray Timing Explorer observations of the recently discovered soft X-ray transient MAXI J1659-152 (initially referred to as GRB 100925A). The source was studied in terms of its evolution through the hardness-intensity diagram (HID) as well as its X-ray variability properties. MAXI J1659-152 traced out an anti-clockwise loop in the HID, which is commonly seen in transient low-mass X-ray binaries. The variability properties of the source, in particular the detection of type-B and type-C low-frequency quasi-periodic oscillations, and the way they evolve along the HID track, indicate that MAXI J1659-152 is a black hole candidate. The spectral and variability properties of MAXI J1659-152 imply that the source was observed in the hard and soft intermediate states during the RXTE observations, with several transitions between these two states.

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