Speed of gravitational waves and black hole hair

被引：50

作者：

Tattersall, Oliver J. ^{[1
]}

Ferreira, Pedro G. ^{[1
]}

Lagos, Macarena ^{[2
]}

机构：

[1] Univ Oxford, Astrophys, DWB, Keble Rd, Oxford OX1 3RH, England

[2] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 08期

基金：

欧洲研究理事会; 英国科学技术设施理事会;

关键词：

MODIFIED GRAVITY; ETHER;

D O I：

10.1103/PhysRevD.97.084005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The recent detection of GRB 170817A and GW170817 constrains the speed of gravity waves c(T) to be that of light, which severely restricts the landscape of modified gravity theories that impact the cosmological evolution of the Universe. In this work, we investigate the presence of black hole hair in the remaining viable cosmological theories of modified gravity that respect the constraint c(T) = 1. We focus mainly on scalar-tensor theories of gravity, analyzing static, asymptotically flat black holes in Horndeski, Beyond Horndeski, Einstein-scalar-Gauss-Bonnet, and Chern-Simons theories. We find that in all of the cases considered here, theories that are cosmologically relevant and respect c(T) = 1 do not allow for hair, or have negligible hair. We further comment on vector-tensor theories including Einstein-Yang-Mills, Einstein-Aether, and generalized Proca theories, as well as bimetric theories.

引用

页数：15

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