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

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) proportional to (1 + z)(3+epsilon), and constraints on epsilon are obtained by combining the galaxy cluster gas mass fractions with cosmic chronometers measurements. We find that epsilon = 0 within 2 sigma c.1., in full agreement with other recent analyses.

Automated summary

In this paper, we test the standard law for the evolution of dark matter density as a function of redshift. We assume a flat universe and the validity of the FRW metric. We consider a deformed dark matter density evolution law and obtain constraints on the parameter epsilon by combining galaxy cluster gas mass fractions with cosmic chronometers measurements. Our results show that epsilon = 0 within 2 sigma c.1., which is consistent with other recent analyses.