An alternative to quintessence

TL;DR

This paper explores a cosmological model using Chaplygin gas, demonstrating its compatibility with observed cosmic acceleration and predicting an increasing effective cosmological constant.

Contribution

It introduces a cosmological model with Chaplygin gas that aligns with current observations and predicts a rising effective cosmological constant.

Findings

Model consistent with cosmic acceleration observations

Predicts increasing effective cosmological constant

Supports Chaplygin gas as an alternative dark energy component

Abstract

We consider a FRW cosmological model with an exotic fluid known as Chaplygin gas. We show that the resulting evolution of the universe is not in disagreement with the current observation of cosmic acceleration. The model predict an increasing value for the effective cosmological constant.