Induced cosmological anisotropies and CMB anomalies by a non-abelian gauge-gravity interaction

被引：0

作者：

Lee, Bum-Hoon ^{[1
,2
]}

Lee, Hocheol ^{[1
,2
]}

Lee, Wonwoo ^{[1
]}

Nilsson, Nils A. ^{[3
,4
]}

Thakur, Somyadip ^{[5
]}

机构：

[1] Sogang Univ, Ctr Quantum Spacetime, Seoul 04107, South Korea

[2] Sogang Univ, Dept Phys, Seoul 04107, South Korea

[3] Inst for Basic Sci Korea, Ctr Theoret Phys Universe, Cosmol Grav & Astroparticle Phys Grp, Daejeon 34126, South Korea

[4] Sorbonne Univ, Univ PSL, SYRTE, Observ Paris,CNRS,LNE, 61 Ave Observ, F-75014 Paris, France

[5] Hanyang Univ, Dept Phys, Seoul 04763, South Korea

来源：

PHYSICS OF THE DARK UNIVERSE | 2024年 / 46卷

基金：

新加坡国家研究基金会;

关键词：

Cosmological anisotropies; Gauge-axion model; CMB anomalies; Dark energy; CONSTANT;

D O I：

10.1016/j.dark.2024.101601

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a non-abelian cousin of the model presented in Lee et al. (2024) which induces cosmological anisotropies on top of standard FLRW geometry. This is in some sense doing a cosmological mean field approximation, where the mean field cosmological model under consideration would be the standard FLRW, and the induced anisotropies are small perturbative corrections on top of it. Here we mostly focus on the non-abelian SU (2) gauge fields coupled to the gravity to generate the anisotropies, which can be a viable model for the axion-like particle (ALP) dark sector. The induced anisotropies are consequences of the nontrivial back-reaction of the gauge fields on the gravity sector, and by a clever choice of the parametrization, one can generate the Bianchi model we have studied in this note. We also show that the anisotropies influence the Sachs-Wolfe effect and we discuss the implications.

引用

页数：13