Is Modified Chaplygin gas along with barotropic fluid responsible for acceleration of the Universe?

TL;DR

This paper investigates a cosmological model where modified Chaplygin gas and barotropic fluid drive the universe's acceleration, analyzing their combined effects across different cosmic eras using statefinder diagnostics.

Contribution

It introduces a unified model with modified Chaplygin gas and barotropic fluid applicable from radiation era to dark energy dominated phases, exploring their role in cosmic acceleration.

Findings

Model describes universe evolution from radiation to dark energy eras.

Statefinder parameters differentiate phases of cosmic evolution.

Model consistent with observational data across different epochs.

Abstract

In this letter, we have considered a model of the universe filled with modified Chaplygin gas and another fluid (with barotropic equation of state) and its role in accelerating phase of the universe. We have assumed that the mixture of these two fluid models is valid from (i) the radiation era to $\Lambda$CDM for $-1\le\gamma\le 1$ and (ii) the radiation era to quiessence model for $\gamma<-1$. For these two fluid models, the statefinder parameters describe different phase of the evolution of the universe.