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arXiv 1402.4772astro-ph.HE
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致密天体吸积盘的几何变化

Geometry variation of accretion disks of Compact Objects

Partha Sarathi Pal, Sandip K. Chakrabarti

摘要:

黑洞候选者在爆发过程中的时间和光谱变化已经在一些出版物中报道。众所周知,在爆发期间,源在最初几天变得柔软,然后在几周或几个月后恢复到坚硬状态。在本文中,我们显示的康普顿化效率(CE)的变化,从黑体光子数的比率,幂律光子数,作为时间的函数在几个爆发。由于幂律光子是通过被拦截的软光子的逆康普顿化产生的,因此CE是康普顿云的几何形状的量度。我们的研究表明,所有的爆发开始于一个大的CE,并在几天后变得非常小,当康普顿云变得非常小,以拦截任何显着数量的软光子。CE在爆发结束时返回到更大的值。

英文摘要:

The Temporal and Spectral variations of black hole candidates during outbursts have been reported in several publications. It is well known that during an outburst, the source becomes soft in the first few days, and then returns to the hard state after a few weeks or months. In the present paper, we show the variation of Comptonization Efficiency (CE), obtained from the ratio of the black body photon number to the power-law photon number, as a function of time in several outbursts. Since the power-law photons are generated through inverse-Comptonization of the intercepted soft photons, the CE is a measure of the geometry of the Compton cloud. Our investigation indicated that all the outbursts starts with a large CE and becomes very small after a few days, when the Compton cloud becomes very small to intercept any significant number of soft photons. CE returns back to a larger value at the end of the outburst.

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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