论文标题
具有正宇宙常数的非平板FLRW模型的二阶灰尘扰动
Second-order dust perturbations of the non-flat FLRW model with the positive cosmological constant
论文作者
论文摘要
在本文中，给出了二阶宇宙学扰动理论的特定解决方案。围绕任何充满灰尘和积极宇宙常数的FLRW时空进行扰动。特别是，可能是非呈空间曲率的。所采用的对称条件使我们能够简化方程式，使我们拥有大量选择密度分布的自由。结果，我们获得了不均匀宇宙学模型的相对简单的指标，该指标将为研究局部不均匀性对宇宙学可观察物的影响提供完美的工具。
In this paper, a specific solution to the second-order cosmological perturbation theory is given. Perturbations are performed around any FLRW spacetime filled with dust and with a positive cosmological constant. In particular, with a possibly non-vanishing spatial curvature. The adopted symmetry condition allows us to simplify the equations, leaving us with a great deal of freedom to choose the density distribution. In the result, we get a relatively simple metric of an inhomogeneous cosmological model, which will give a perfect tool for studying the influence of the local inhomogeneities onto the cosmological observables.
