Accelerating Universe via Spatial Averaging

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We present a model of an inhomogeneous universe that leads to accelerated expansion after taking spatial averaging. The model universe is the Tolman-Bondi solution of the Einstein equation and contains both a region with positive spatial curvature and a region with negative spatial curvature. We find that after the region with positive spatial curvature begins to re-collapse, the deceleration parameter of the spatially averaged universe becomes negative and the averaged universe starts accelerated expansion. We also discuss the generality of the condition for accelerated expansion of the spatially averaged universe.
4 pages

Keywords

General Relativity and Quantum Cosmology, Astrophysics

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/35325

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/0507057
 http://arxiv.org/abs/gr-qc/0507057

Collections

arXiv