Bianchi type-II universe with wet dark fluid in General Theory of Relativity

TL;DR

This paper develops dark energy models in a Bianchi type-II universe filled with wet dark fluid, deriving exact solutions to Einstein's equations and exploring specific cases of the fluid's equation of state.

Contribution

It introduces a new wet dark fluid equation of state into Bianchi type-II models and provides exact solutions within General Relativity.

Findings

Exact solutions for the Einstein field equations are obtained.

Models for specific cases of the equation of state are discussed.

The behavior of the universe with wet dark fluid is analyzed.

Abstract

In this paper, dark energy models of the universe filled with wet dark fluid are constructed in the framework of LRS Bianchi type-II space-time in General Theory of Relativity. A new equation of state modeled on the equation of state $p$=$\gamma(\rho - \rho_*)$, which can describe a liquid including water, is used. The exact solutions of Einstein's field equations are obtained in quadrature form and the models corresponding to the cases $\gamma = 0$ and $\gamma = 1$ are discussed in detail.