A model of interacting holographic dark energy at the Ricci's scale

TL;DR

This paper proposes a holographic dark energy model based on Ricci's scale, where dark matter and dark energy interact non-gravitationally, addressing the cosmic coincidence problem and constrained by multiple observational datasets.

Contribution

It introduces a novel interacting holographic dark energy model using Ricci's scale and demonstrates its consistency with diverse cosmological observations.

Findings

The model alleviates the cosmic coincidence problem.

It fits observational data well across multiple cosmological probes.

The interaction between dark matter and dark energy is supported by data.

Abstract

We study a holographic cosmological model in which the infrared cutoff is set by the Ricci's length and dark matter and dark energy do not evolve on their own but interact non-gravitationally with each other. This greatly alleviates the cosmic coincidence problem because the ratio between both components does not vanish at any time. We constrain the model with observational data from supernovae, cosmic background radiation, baryon acoustic oscillations, gas mass fraction in galaxy clusters, the history of the Hubble function, and the growth function.