论文标题
在标量调整宇宙学中的多流体扰动上
On multifluid perturbations in scalar-tensor cosmology
论文作者
论文摘要
在本文中，使用1+3的协变方法将标量调整理论应用于多流体宇宙中扰动的研究。标量和谐波分解均在扰动方程式上建立。特别是，作为一种应用，我们研究了背景FRW宇宙学的扰动，在标量场的存在下既由辐射和灰尘组成。我们分别考虑辐射为主和以灰尘为主的时期，并研究结果。在分析过程中，建立了准静态近似。据观察，能量密度的波动随着红移的增加而降低，对于电源法的$ n $的不同值$ r^{n} $模型
In this paper the scalar-tensor theory is applied to the study of perturbations in a multi-fluid universe, using the 1+3 covariant approach. Both scalar and harmonic decompositions are instituted on the perturbation equations. In particular, as an application, we study perturbations on a background FRW cosmology consisting of both radiation and dust in the presence of a scalar field. We consider both radiation-dominated and dust-dominated epochs, respectively, and study the results. During the analysis, quasi-static approximation is instituted. It is observed that the fluctuations of the energy density decrease with increasing redshift, for different values of $n$ of a power law $R^{n}$ model
