论文标题
GW170817之后，用重力波来限制Palatini-Horndeski理论
Constraining Palatini-Horndeski theory with gravitational waves after GW170817
论文作者
论文摘要
在本文中，我们研究了palatini-horndeski理论的可能参数空间，并在空间平坦的宇宙中具有引力波。我们发现，如果该理论满足以下条件：在任何空间平坦的宇宙学背景下，张量引力波速度是光$ c $的速度，则只有$ s = \ int d^4x \ sqrt {-g} \ big [k（ϕ，x）-g_ {3}（ϕ，x）{\ tilde {\ box}} ϕ+g_ {4}（4}（ϕ）\ tilde {r} \ big] $是Palatini-Horndeski理论的可能动作。
In this paper, we investigate the possible parameter space of Palatini-Horndeski theory with gravitational waves in a spatially flat Universe. We find that if the theory satisfies the following condition: in any spatially flat cosmological background, the tensor gravitational wave speed is the speed of light $c$, then only $S = \int d^4x \sqrt{-g} \big[K(ϕ,X)-G_{3}(ϕ,X){\tilde{\Box}}ϕ+G_{4}(ϕ)\tilde{R}\big]$ is left as the possible action in Palatini-Horndeski theory.
