Cosmic Constraint on Ricci Dark Energy Model

TL;DR

This study tests the Ricci dark energy model against observational data, finding it to be a viable dark energy candidate with specific best-fit parameters, using a maximum likelihood approach.

Contribution

It provides the first comprehensive observational constraints on the Ricci dark energy model, establishing its viability with specific parameter estimates.

Findings

Ricci dark energy fits observational data well

Best-fit parameters are $oxed{ ext{Ω}_{m0}=0.34 extpm 0.04}$ and $oxed{ ext{α}=0.38 extpm 0.03}$

Model is consistent with current cosmological observations

Abstract

In this paper, a holographic dark energy model, dubbed Ricci dark energy, is confronted with cosmological observational data from type Ia supernovae (SN Ia), baryon acoustic oscillations (BAO) and cosmic microwave background (CMB). By using maximum likelihood method, it is found out that Ricci dark energy model is a viable candidate of dark energy model with the best fit parameters: $\Omega_{m0}=0.34\pm 0.04$, $\alpha=0.38\pm 0.03$ with $1\sigma$ error. Here, $\alpha$ is a dimensionless parameter related with Ricci dark energy $\rho_{R}$ and Ricci scalar $R$, i.e., $\rho_{R}\propto \alpha R$.