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arXiv 1502.01432astro-ph.HE
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4U 1630-47的QPO状态

The QPO states of 4U 1630-47

Manojendu Choudhury, Nilay Bhatt, Subir Bhattacharyya

摘要:

在瞬变黑洞双星系统中,4U 1630-47是最活跃的源之一,每隔几百天就会爆发一次,每次爆发通常持续几百天左右。在2002-2004年爆发期间,准周期振荡(QPO)的出现与异常态的出现相吻合。有两种不同的QPO态:即单QPO态和双QPO态,其中单QPO态和双QPO态不存在谐波关系。这种状态的光谱特征被1998年的一次爆发所证实。的内部光盘温度和内部光盘半径的演变建议可能的发病几何厚,薄光盘作为一个可能的解释的能量谱特征。也存在其他可能性,包括康普顿化云,可以解释异常状态。这两种不同的QPO态表现出不同的光谱特征,通过对光谱特征演化的观察,我们提供了一个可能的经验物理方案。

英文摘要:

Among the transient black hole binary systems, 4U 1630-47 is one of the most active sources exhibiting outbursts every few hundred days, with every outburst lasting typically around hundred days. During the 2002-2004 outburst the appearance of quasi-periodic oscillations (QPOs) coincide with the onset of anomalous state. There are two distinct QPO states: namely the single QPO state with one QPO and the twin QPO state with two QPOs not related harmonically. The spectral features of this state are corroborated by a previous outburst in 1998. The evolution of the inner disc temperature and the inner disc radius suggest the possible onset of geometrically thicker, slim disc as a possible explanation of the energy spectral features. The other possibilities involving the Comptonizing cloud also exist that may explain the anomalous state. The two different QPO states exhibit different spectral features, and we provide a possible empirical physical scenario from the observation of the evolution of the spectral features.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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