论文标题
粘性宇宙学模型中的重力波光度距离
Gravitational Wave luminosity distance in viscous cosmological models
论文作者
论文摘要
我们研究了由非完美液体驱动的宇宙学时代期间所谓的引力波光度距离距离距离偏射率$ d_l^{\，gw}（z）$。特别是，我们表明能量动量张量中存在剪切粘度是最相关的效果。在这种情况下，恒定的剪切粘度印记通过摩擦项$δ（z）$具有唯一给定红移依赖性的摩擦项$δ（z）$。这种特殊的进化预测了比率$ d_ {l}^{gw}/d_ {l}^{em} $的特定形状，当源为$ z \ gtrsim 1 $时，它会趋向于恒定值，而与较低的shear viscosity lineareal缩放的剪切粘度在较低的redshifts上，$ 0.根据我们的最终讨论，可以通过针对一些经过修改的重力研究理论提供的类似场景的多通间源来测试剪切粘度提供的预测红移依赖$δ（z）$。
We study the so-called Gravitational Wave luminosity distance-redshift relation $d_L^{\,GW}(z)$ during cosmological eras driven by non-perfect fluids. In particular, we show that the presence of a shear viscosity in the energy momentum tensor turns out to be the most relevant effect. Within this scenario, a constant shear viscosity imprints the gravitational wave propagation through a friction term $δ(z)$ with a uniquely given redshift dependence. This peculiar evolution predicts a specific shape for the ratio $d_{L}^{GW}/d_{L}^{EM}$ which tends to a constant value when the sources are at $z\gtrsim 1$, whereas scales linearly with the shear viscosity at lower redshifts, regardless of the value of $Ω_{m0}$. According to our final discussion, the predicted redshift dependence $δ(z)$ provided by a shear viscosity could be tested by upcoming surveys of multi-messenger sources against analogous scenarios provided by some widely studied theories of modified gravity.
