Observational constraints on axion(s) dark energy with a cosmological constant

被引：3

作者：

Ruchika ^{[1
]}

Adil, Shahnawaz A. ^{[2
]}

Dutta, Koushik ^{[3
,4
]}

Mukherjee, Ankan ^{[1
,5
]}

Sen, Anjan A. ^{[1
]}

机构：

[1] Jamia Millia Islamia, Ctr Theoret Phys, New Delhi 110025, India

[2] Jamia Millia Islamia, Dept Phys, Delhi 110025, India

[3] Indian Inst Sci Educ & Res Kolkata, Mohanpur 741246, West Bengal, India

[4] HBNI, Saha Inst Nucl Phys, Theory Divison, 1-AF Bidhannagar, Kolkata 700064, India

[5] Bangabasi Coll, Dept Phys, Kolkata 700009, India

来源：

PHYSICS OF THE DARK UNIVERSE | 2023年 / 40卷

关键词：

Dark energy; Axion; Cosmological constant; BARYON ACOUSTIC-OSCILLATIONS; LAMBDA-CDM; GALAXIES; DISTANCE; CLUSTERS; MATTER; SAMPLE; H-0; I;

D O I：

10.1016/j.dark.2023.101199

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The present work deals with a dark energy model that has an oscillating scalar field potential along with a cosmological constant (CC). The oscillating part of the potential represents the contribution of a light axion field in the dark energy that has its origin in the String-Axiverse scenario. The model has been confronted with the latest cosmological observations. The results show that a sub-Planckian value of the axion field decay constant is consistent observational data. Furthermore, in terms of the observational data considered in this work, the axion model is preferred over the ?CDM model in terms of AIC, BIC information criteria as well as in terms of Bayesian evidence. The oscillating feature in the scalar field evolution and in the equation of state for the dark energy can be observed for the allowed parameters space. It is also observed that cluster number counts in this axion model are suppressed compared to the ?CDM and this suppression is enhanced for the sub-Planckian values for the axion decay constant.

引用

页数：11

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