论文标题
扰动水平相互作用的暗能量模型及其对延迟宇宙学参数的影响
Perturbation level interacting dark energy model and its consequence on late-time cosmological parameters
论文作者
论文摘要
在本文中，我们研究了在黑暗扇区中与纯动量转移相互作用的功能，以调和低红移观测和宇宙微波背景（CMB）结果之间的紧张局势。与纯动量交换的这类相互作用模型在扰动水平中对标准模型进行了修改。我们通过比较观测数据来研究该模型，包括集成的Sachs-Wolfe-Galaxy互相关，星系功率谱，$Fσ_8$和CMB数据。结果表明，该模型可以减轻$σ_8$之间观察到的本地测量和全局测量之间的张力。根据我们的结果，交互模型的$σ_8$的最佳拟合值为$ 0.700 $，低于$λ$ CDM型号的$ 0.700 $，并且与低红移观测值一致。此外，我们执行预测分析，以从未来实验中找到相互作用模型的参数的约束。
In the present paper, we study the capability of interacting dark energy model with pure momentum transfer in the dark sector to reconcile tensions between low redshift observations and cosmic microwave background (CMB) results. This class of interacting model with pure momentum exchange introduces modifications to the standard model in the level of perturbation. We investigate the model by comparing to observational data, including integrated Sachs-Wolfe-galaxy cross-correlation, galaxy power spectrum, $f σ_8$, and CMB data. It is shown that this model can alleviate the observed tension between local and global measurements of $σ_8$. According to our results, the best fit value of $σ_8$ for interacting model is $0.700$, which is lower than the one for $Λ$CDM model and also is consistent with low redshift observations. Furthermore, we perform a forecast analysis to find the constraints on parameters of the interacting model from future experiments.
