Speed of gravitational waves and black hole hair
Speed of gravitational waves and black hole hair
复制标题
DOI：
10.1103/physrevd.97.084005
复制
发表时间：
2018-02
影响因子：
5
通讯作者：
O. Tattersall;P. Ferreira;Macarena Lagos
中科院分区：
文献类型：
--
作者：
O. Tattersall;P. Ferreira;Macarena Lagos
最近探测到的GRB 170817A和GW170817将重力波的速度限制为光速，这严重限制了影响宇宙宇宙学演化的修正引力理论的前景。在这项工作中，我们研究了仍然可行的修正引力宇宙学理论中黑洞毛发的存在，这些理论遵守约束$c_T=1$。我们主要关注引力的标量张量理论，分析了Horndeski、Beyond Horndeski、Einstein-Scalar-Gauss-Bonnet和Chern-Simons理论中静态的、渐近平坦的黑洞。我们发现，在这里考虑的所有情况下，尊重$c_T=1$的理论都不允许有头发，或者没有可以忽略的头发。我们进一步评论了矢量张量理论，包括爱因斯坦杨-米尔斯理论、爱因斯坦-以太理论和推广的普罗卡理论，以及双测理论。
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 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 Generalised Proca theories, as well as bimetric theories.