Kantowski-Sachs universe cannot be closed
Astrophysics
2009-11-10 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
In this paper, by analyzing the instability against spatially homogeneous and anisotropic perturbations of the Kantowski-Sachs-type during different cosmological epoch, we show that it is a theoretical consequence of the general relativity that the KS universe must be open or flat if it underwent the matter dominated and/or radiation dominated era in its past evolution, which theoretically confirms the flatness of our observable universe.
Keywords
Cite
@article{arxiv.astro-ph/0308288,
title = {Kantowski-Sachs universe cannot be closed},
author = {Xin-zhou Li and Jian-gang Hao},
journal= {arXiv preprint arXiv:astro-ph/0308288},
year = {2009}
}
Comments
8 pages, to be published in Phys. Rev. D