论文标题
宇宙学模型，具有时间依赖的$λ$，$ g $和粘性的液体一般相对论
A cosmological model with time dependent $Λ$, $G$ and viscous fluid in General Relativity
论文作者
论文摘要
在本文中，我们调查了带有散装粘性流体的Bianchi型$ -V $宇宙学模型，并且时间变化了宇宙学$λ$和Newtonian $ G $参数。爱因斯坦的场方程已转化为非线性耦合， 一阶微分方程以及数值集成的四阶runge-kutta方法已用于与与当前宇宙学观测值一致的适当初始条件的微分方程集成。我们表明，该模型描述了一个以负宇宙学术语开始的宇宙，以及以物质为主和减速的早期时代，最终变成$λ$汤匙，并随着当前的观察结果一致。
In this paper, we investigate Bianchi type$-V$ cosmological models with bulk viscous fluid and time varying cosmological $Λ$ and Newtonian $G$ parameters. The Einstein's field equations have been transformed into a coupling non-linear, first-order differential equations, and the fourth-order Runge-Kutta method of numerical integration has been used to integrate the differential equations with appropriate initial conditions consistent with current cosmological observations. We show that the model describes a universe that starts off with a negative cosmological term, as well as a matter-dominated and decelerated early epoch that, eventually becomes $Λ$-dominated and expanding with acceleration, in concordance with current observations.
