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arXiv 0809.1284gr-qc
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膜世界黑洞上的薄吸积盘

Thin accretion disks onto brane world black holes

C. S. J. Pun, Z. Kovacs, T. Harko

摘要:

我们宇宙的膜世界描述需要一个大的额外维度和一个基本的引力尺度,与普朗克尺度相比,这个尺度可能要低几个数量级。膜世界方案的一个有趣的结果是膜引力场方程的真空解的性质,与广义相对论的标准黑洞解相比,其性质非常不同。从观测上区分不同类型黑洞的一种可能性是研究吸积盘的发射特性。本文给出了几类静态和旋转膜世界黑洞周围的吸积盘的能流、发射光谱和吸积效率,并与广义相对论情况作了比较。电磁波谱中可能出现特殊的特征,从而有可能利用对吸积盘发射光谱的天体物理观测直接检验额外维度的物理模型。

英文摘要:

The braneworld description of our universe entails a large extra dimension and a fundamental scale of gravity that might be lower by several orders of magnitude as compared to the Planck scale. An interesting consequence of the braneworld scenario is in the nature of the vacuum solutions of the brane gravitational field equations, with properties quite distinct as compared to the standard black hole solutions of general relativity. One possibility of observationally discriminating between different types of black holes is the study of the emission properties of the accretion disks. In the present paper we obtain the energy flux, the emission spectrum and accretion efficiency from the accretion disks around several classes of static and rotating brane world black holes, and we compare them to the general relativistic case. Particular signatures can appear in the electromagnetic spectrum, thus leading to the possibility of directly testing extra-dimensional physical models by using astrophysical observations of the emission spectra from accretion disks.

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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