Observational constraints on a holographic, interacting dark energy model

TL;DR

This paper evaluates an interacting holographic dark energy model against various observational data, finding it fits reasonably well and alleviates the coincidence problem, though the standard Lambda-CDM model remains slightly preferable.

Contribution

It provides observational constraints on a holographic, interacting dark energy model and assesses its viability compared to the standard cosmological model.

Findings

Model fits observational data reasonably well

Alleviates the coincidence problem

Compatible with the age of old quasar at 1σ confidence level

Abstract

We constrain an interacting, holographic dark energy model, first proposed by two of us in [1], with observational data from supernovae, CMB shift, baryon acoustic oscillations, x-rays, and the Hubble rate. The growth function for this model is also studied. The model fits the data reasonably well but still the conventional $\Lambda$CDM model fares better. Nevertheless, the holographic model greatly alleviates the coincidence problem and shows compatibility at $1\sigma$ confidence level with the age of the old quasar APM 08279+5255.