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arXiv 1406.2181gr-qcastro-ph.HE
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关于大质量吸积盘在黑洞自旋测量中的作用

Note on the effect of a massive accretion disk in the measurements of black hole spins

Cosimo Bambi, Daniele Malafarina, Naoki Tsukamoto

摘要:

黑洞的自旋测量在物理学和天体物理学中具有重要意义。不管用什么技术来估计黑洞的自旋,目前所有的方法都假定致密物体周围的时空几何可以用克尔解精确描述。这显然是一种近似,因为克尔度规是真空爱因斯坦方程的定态解。本文用一个简单的分析模型估计了大质量吸积盘在测量黑洞自旋中的作用。对于典型的吸积盘来说,盘的质量是完全可以忽略的,即使是将来更精确的测量也是如此。然而,对于具有非常大的磁盘的系统,这种影响可能不会被忽略。

英文摘要:

The spin measurement of black holes has important implications in physics and astrophysics. Regardless of the specific technique to estimate the black hole spin, all the current approaches assume that the space-time geometry around the compact object is exactly described by the Kerr solution. This is clearly an approximation, because the Kerr metric is a stationary solution of the vacuum Einstein equations. In this paper, we estimate the effect of a massive accretion disk in the measurement of the black hole spin with a simple analytical model. For typical accretion disks, the mass of the disk is completely negligible, even for future more accurate measurements. However, for systems with very massive disks the effect may not be ignored.

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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