A test of the standard dark matter density evolution law using galaxy clusters and cosmic chronometers

Autor: Kamal Bora, R. F. L. Holanda, Shantanu Desai, S. H. Pereira
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: European Physical Journal C: Particles and Fields, Vol 82, Iss 1, Pp 1-6 (2022)
Druh dokumentu: article
ISSN: 1434-6044
1434-6052
DOI: 10.1140/epjc/s10052-022-09987-3
Popis: Abstract In this paper, we implement a test of the standard law for the dark matter density evolution as a function of redshift. For this purpose, only a flat universe and the validity of the FRW metric are assumed. A deformed dark matter density evolution law is considered, given by $$\rho _c(z) \propto (1+z)^{3+\epsilon }$$ ρ c ( z ) ∝ ( 1 + z ) 3 + ϵ , and constraints on $$\epsilon $$ ϵ are obtained by combining the galaxy cluster gas mass fractions with cosmic chronometers measurements. We find that $$\epsilon =0$$ ϵ = 0 within 2 $$\sigma $$ σ c.l., in full agreement with other recent analyses.
Databáze: Directory of Open Access Journals
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