Role of Chaplygin gas as geometrical dark energy in anisotropic brane gravity

TL;DR

This paper explores how generalized Chaplygin gas can act as a geometrical dark energy component in anisotropic brane-world models, providing exact solutions and analyzing key cosmological parameters.

Contribution

It introduces a novel approach by modeling dark energy as a geometrical effect in anisotropic brane-world scenarios without junction conditions.

Findings

Exact parametric solutions for Bianchi type I and V models.

Behavior of shear, anisotropy, and deceleration parameters analyzed.

Chaplygin gas effectively models accelerated expansion in anisotropic settings.

Abstract

We consider an anisotropic brane-world model with Bianchi type I and V geometry, without mirror symmetry or any form of junction conditions. The generalized Chaplygin gas, which interpolates between a high density relativistic era and a non-relativistic matter phase, is a popular candidate for the present accelerated expansion of the universe. Considering the generalized Chaplygin gas as a geometrical dark energy, we obtain the general solutions in an exact parametric form for both Bianchi type I and V space-times. Finally, we study the behavior of the observationally important parameters such as the shear, anisotropic and deceleration parameter in this model.