论文标题
特殊速度对具有完美流体的宇宙学模型中重力电位的影响
Effect of peculiar velocities on the gravitational potential in cosmological models with perfect fluids
论文作者
论文摘要
我们认为一个充满了完美流体的宇宙，并具有状态参数$ω$的恒定方程。在标量扰动的理论中，我们研究了奇特速度对重力潜力的影响。对于$ω= 1/3 $的辐射，我们以积分形式获得了重力电位的表达式。数值计算清楚地证明了由于存在特殊速度而导致的声学振荡对重力电势的调节。我们还表明，对于$ω= -1/3 $的沮丧的宇宙字符串网络，奇特的速度会影响重力电位。
We consider a universe filled with perfect fluid with the constant equation of state parameter $ω$. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with $ω=1/3$, we obtain the expression for the gravitational potential in the integral form. Numerical calculation clearly demonstrates the modulation of the gravitational potential by acoustic oscillations due to the presence of peculiar velocities. We also show that peculiar velocities affect the gravitational potential in the case of the frustrated network of cosmic strings with $ω=-1/3$.
