Dark energy-dark matter interactions as a solution to the S8 tension

被引：49

作者：

Lucca, Matteo ^{[1
]}

机构：

[1] Univ Libre Bruxelles, Serv Phys Theor, CP 225, B-1050 Brussels, Belgium

来源：

PHYSICS OF THE DARK UNIVERSE | 2021年 / 34卷

关键词：

Dark energy; Dark matter; Cosmological tensions; VACUUM;

D O I：

10.1016/j.dark.2021.100899

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this work we consider a scenario where the dark energy is a dynamical fluid whose energy density can be transferred to the dark matter via a coupling function proportional to the energy density of the dark energy. In particular, we investigate this model's ability to address the S-8 tension and find that against data from Planck, BAO and Pantheon the model (1) can significantly reduce the significance of the tension, (2) does so without exacerbating nor introducing any other tension (such as the H-0 tension) and (3) without worsening the fit to the considered data sets with respect to the Lambda CDM model. We also test the model against data from weak lensing surveys such as KiDS and DES, and find that the model's ability to address the S-8 tension further improves, without a significant impact on any other parameter nor statistical measure. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：7

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