Exploring the Possibility of Interacting Quintessence Model as an Alternative to the $\Lambda$CDM Model

TL;DR

This paper investigates interacting quintessence dark energy models as potential alternatives to the standard { extLambda}CDM model, using observational data and Bayesian comparison to evaluate their viability.

Contribution

It introduces a general parameterization of quintessence potentials and compares multiple interaction forms with { extLambda}CDM using Bayesian methods.

Findings

Interacting models show positive evidence over { extLambda}CDM.

The analysis encompasses a broad class of potentials.

Bayesian comparison favors interacting models.

Abstract

This study examines interacting quintessence dark energy models and their observational constraints for a general parameterization of the quintessence potential, which encompasses a broad range of popular potentials. Four different forms of interactions are considered. The analysis is done by expressing the system as a set of autonomous equations for each interaction. The Bayesian Model Comparison has been used to compare these models with the standard Lambda Cold Dark Matter ({\Lambda}CDM) model. Our analysis shows positive and moderate evidence for the interacting models over the {\Lambda}CDM model.