宇宙标量场在黑洞上的球面非线性吸收
Spherical non-linear absorption of cosmological scalar fields onto a black hole
摘要：
在本文中，我们跟踪到史瓦西黑洞时空的无质量标量场的非线性球演化作为一个第一近似的宇宙学动机的经典标量场的吸积。我们进行了相关的分析，波包描述波数和宽度。我们研究了波数k的不同值，发现当k = 0且包宽度大于Schwarzschild半径时，吸收是不完全的。在我们研究的k > 0的情况下，黑洞吸收了向视界运动的标量场的全部能量密度。我们的研究结果表明，假设球对称，在非线性制度，有情况下，标量场被允许生存的黑洞外，并最终可能有生命时间与宇宙学的时间尺度一致。
英文摘要：
In this paper we track the non-linear spherical evolution of a massless scalar field onto a Schwarzschild black hole space-time as a first approximation to the accretion of cosmologically motivated classical scalar fields. We perform an analysis related to wave packets described by wave number and width. We study various values of the wave number k, and found that for k = 0 and width packets bigger than the Schwarzschild radius, the absorption is not total. In the cases we studied for k > 0, the black hole absorbs the total amount of energy density of the scalar field moving toward the horizon. Our results indicate that assuming spherical symmetry, in the non-linear regime, there are cases for which scalar fields are allowed to survive outside black holes and may eventually have life-times consistent with cosmological time scales.
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