Dark energy models with variable equation of state parameter

TL;DR

This paper investigates dark energy models with a variable equation of state parameter, demonstrating their consistency with recent observational data and analyzing their physical implications.

Contribution

It introduces a model with a time-dependent equation of state parameter using a specific law of Hubble's parameter variation, aligning with current observations.

Findings

The equation of state parameter $$ varies with time.

Model results are consistent with SN Ia, CMBR, and galaxy clustering data.

Physical significance of the models is discussed.

Abstract

The dark energy models with variable equation of state parameter $\omega$ is investigated by using law of variation of Hubble's parameter that yields the constant value of deceleration parameter. The equation of state parameter $\omega$ is found to be time dependent and its existing range for this model is consistent with the recent observations of SN Ia data, SN Ia data (with CMBR anisotropy) and galaxy clustering statistics. The physical significance of the dark energy models has also been discussed.