Gravitational field of domain wall in Lyra geometry

Abstract

In this paper, we study the domain wall with time dependent displacement vectors based on Lyra geometry in normal gauge i.e. displacement vector $f_i^{\ast }=[{\hat{I}}^2(t),0,0,0]$. The field theoretic energy momentum tensor is considered with zero pressure perpendicular to the wall. We find an exact solutions of Einstein equation for a scalar field $\ddot{I}•$ with a potential $V(\ddot{I}•)$ describing the gravitational field of a plane symmetric domain wall. We have seen that the hyper surfaces parallel to the wall ($z=constant$) are three dimensional de-sitter spaces. It is also shown that the gravitational field experienced by test particle is attractive.

11 pages, 6 figures; Submitted in Astrophysics and Space Science after minor revision