Comparison of A CDM and R h = ct with updated galaxy cluster f gas measurements using Bayesian inference

被引：0

作者：

Panchal, Kunj ^{[1
]}

Desai, Shantanu ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Hyderabad 502284, Telangana, India

来源：

JOURNAL OF HIGH ENERGY ASTROPHYSICS | 2024年 / 43卷

关键词：

MASS FRACTION; X-RAY; COSMOLOGICAL CONSTRAINTS; SUNYAEV-ZELDOVICH; DEPLETION FACTOR; BARYON CONTENT; LAMBDA-CDM; EVOLUTION; HUBBLE; ASTROPHYSICS;

D O I：

10.1016/j.jheap.2024.06.003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use updated gas mass fraction measurements of 44 massive dynamically relaxed galaxy clusters collated in Mantz et al. (2022) to distinguish between the standard A CDM model and R h = ct universe. For this purpose, we use Bayesian model selection to compare the efficacy of both these cosmological models given the data. The gas mass fraction is modeled using both cosmology-dependent terms and also astrophysical parameters, which account for the variation with cluster mass and redshift. We used two different prior choices for some of the astrophysical parameters. We find a Bayes factors of 50 and 5 for A CDM as compared to R h = ct for these two prior choices. This implies that A CDM is favored compared to R h = ct with significance ranging from substantial to very strong.

引用

页码：15 / 19

页数：5

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