Probing the dark matter density evolution law with large scale structures
2021
We propose a new method to explore a possible departure from the standard time evolution law for the dark matter density. We looked for a violation of this law by using a deformed evolution law, given by $$\rho _c(z) \propto (1+z)^{3+\epsilon }$$
, and then constrain $$\epsilon $$
. The dataset used for this purpose consists of Strong Gravitational Lensing data obtained from SLOAN Lens ACS, BOSS Emission-line Lens Survey, Strong Legacy Survey SL2S, and SLACS; along with galaxy cluster X-ray gas mass fraction measurements obtained using the Chandra Telescope. Our analyses show that $$\epsilon $$
is consistent with zero within 1 $$\sigma $$
c.l., but the current dataset cannot rule out with high confidence level interacting models of dark matter and dark energy.
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