论文标题
偏斜作为黑暗能量扰动的测试
Skewness as a test of dark energy perturbations
论文作者
论文摘要
我们研究了深色能量扰动在偏度$ s_3 $的大规模物质分布中所扮演的角色。我们考虑了一个由物质和暗能量组成的两流体宇宙，在两个组件中都有扰动，并从数值上估计物质密度场的偏度作为暗能量参数的函数。我们表征了当今的$ s_3 $值，用于精髓和幻影深色能量宇宙学及其对物质密度参数$ω__{m0} $的依赖，以及具有准确的数值拟合的深色能量声音速度$ c^2_s $。这些拟合可用于针对大规模结构的未来高质量数据测试宇宙学。
We investigate the role played by dark energy perturbations in the skewness $S_3$ of large-scale matter distribution. We consider a two-fluid universe composed by matter and dark energy, with perturbations in both components, and we estimate numerically the skewness of the matter density field as a function of the dark energy parameters. We characterize today's $S_3$ value for quintessence and phantom dark energy cosmologies as well as its dependence on the matter density parameter $Ω_{m0}$ and the dark energy sound speed $c^2_s$ with accurate numerical fitting. These fits can be used to test cosmology against future high quality data on large scale structure.
