Growth of massive scalar hair around a Schwarzschild black hole

被引：42
作者：
Clough, Katy [1 ]
Ferreira, Pedro G. [1 ]
Lagos, Macarena [2 ]
机构：
[1] Univ Oxford, DWB, Astrophys, Keble Rd, Oxford OX1 3RH, England
[2] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
来源：
PHYSICAL REVIEW D | 2019年 / 100卷 / 06期
基金：
欧洲研究理事会;
关键词：
DARK-MATTER; EQUATION; KERR;
D O I：
10.1103/PhysRevD.100.063014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Through numerical simulations of a minimally coupled massive Klein-Gordon scalar field, we show that it is possible to grow hair on a Schwarzschild black hole if one assumes an initial periodically time-varying but spatially homogeneous scalar background. By "hair," we mean a nontrivial profile in the scalar field. We find that this profile emerges on a timescale related to the mass of the black hole, with features related to the mass of the scalar particle. We undertake simulations with and without backreaction on the metric and see that the essential, qualitative features remain consistent. We also contrast the results from higher mass scalars to the case of a low mass with a large Compton wavelength. The results are particularly relevant for scalar-tensor theories of gravity and dark matter models consisting of a massive scalar, e.g., axions.
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页数：10
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