Self-interacting holographic dark energy

TL;DR

This paper explores a self-interacting holographic dark energy model in a flat universe, fitting observational data and addressing the coincidence and age crises, showing it accelerates faster than Lambda-CDM.

Contribution

It introduces a self-interacting holographic dark energy model and demonstrates its consistency with observational data, offering a potential solution to the coincidence problem.

Findings

Model fits BAO and CMB data well.

Accelerates faster than Lambda-CDM.

Addresses the age crisis with old quasar data.

Abstract

We investigate a spatially flat Friedmann-Robertson-Walker (FRW) universe where dark matter exchanges energy with a self-interacting holographic dark energy (SIHDE). Using the $\chi^2$--statistical method on the Hubble function, we obtain a critical redshift that seems to be consistent with both BAO and CMB data. We calculate the theoretical distance modulus for confronting with the observational data of SNe Ia for small redshift $z\leq 0.1$ and large redshift $0.1 \leq z\leq 1.5$. The model gets accelerate faster than the $\Lambda$CDM one and it can be a good candidate to alleviate the coincidence problem. We also examine the age crisis at high redshift associated with the old quasar APM 08279+5255.