Holographic dark energy interacting with dark matter

TL;DR

This paper explores a cosmological model where dark energy, modeled via holographic principles, interacts with dark matter, and uses observational data to estimate key parameters of the universe.

Contribution

It introduces a specific interacting dark energy model with holographic Ricci cutoff and constrains its parameters using Hubble data.

Findings

Hubble constant estimated at 73.6 km/s/Mpc

Asymptotic equation of state parameter is -0.842

Dark energy density varies between 0.25R and 0.27R

Abstract

We investigate a spatially flat Friedmann-Robertson-Walker (FRW) cosmological model with cold dark matter coupled to a dark energy which is given by the modified holographic Ricci cutoff. The interaction used is linear in both dark energy densities, the total energy density and its derivative. Using the statistical method of $\chi^2$-function for the Hubble data, we obtain $H_0=73.6km/sMpc$, $\omega_s=\gamma_s -1=-0.842$ for the asymptotic equation of state and $ z_{acc}= 0.89 $. The estimated values of $\Omega_{c0}$ which fulfill the current observational bounds corresponds to a dark energy density varying in the range $0.25R < \ro_x < 0.27R$.