膨胀宇宙中的黑洞

IF 3.6 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Nikodem Popławski
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引用次数: 0

摘要

麦克维蒂度规不能描述膨胀宇宙中的物理黑洞,因为它的曲率、标量和视界上的压力是无限的。我们表明,将这个度量扩展到非均匀尺度因子,它取决于时间和径向坐标,通过在视界施加哈勃参数的恒常性和尺度因子梯度的特定约束来消除这些无限大。我们考虑了这个度规的一个特殊情况,并证明了所有中心对称黑洞视界上的哈勃参数等于相同的常数。由于这个等式以及视界附近与科特勒度规的等价,黑洞不会随着宇宙膨胀而增长。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Black holes in the expanding Universe
The McVittie metric does not describe a physical black hole in an expanding Universe because the curvature scalar and pressure at its event horizon are infinite. We show that extending this metric to an inhomogeneous scale factor, which depends on both the time and radial coordinate, removes those infinities by imposing at the horizon the constancy of the Hubble parameter and a particular constraint on the gradient of the scale factor. We consider a special case of this metric, and show that the Hubble parameters at the event horizons of all centrally symmetric black holes are equal to the same constant . Because of this equality and the equivalence to the Kottler metric near the horizon, black holes do not grow with the Universe expansion.
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来源期刊
Classical and Quantum Gravity
Classical and Quantum Gravity 物理-天文与天体物理
CiteScore
7.00
自引率
8.60%
发文量
301
审稿时长
2-4 weeks
期刊介绍: Classical and Quantum Gravity is an established journal for physicists, mathematicians and cosmologists in the fields of gravitation and the theory of spacetime. The journal is now the acknowledged world leader in classical relativity and all areas of quantum gravity.
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