A Local View of the Observable Universe
Abstract
We present results on the non-linear dynamics of inhomogeneous cosmological models with irrotational dust and a positive cosmological constant, considering, in particular, a wide class with vanishing magnetic Weyl tensor. For those patches of the universe that do not recollapse to a singularity we find a unique attractor, representing a de Sitter vacuum phase. For the (re-)collapsing regions we find a family of (Kasner) attractors, so that generically these regions fall in spindle-like singularities. These results give substantial support to the idea that the universe can be very inhomogeneous on ultra-large, super-horizon scales, whit observers living in those (almost) isotropic regions that emerge from an inflationary phase.
Keywords
Cite
@article{arxiv.astro-ph/9407054,
title = {A Local View of the Observable Universe},
author = {M. Bruni and S. Matarrese and O. Pantano},
journal= {arXiv preprint arXiv:astro-ph/9407054},
year = {2009}
}
Comments
9 pages, uuencoded postscript file including figures, DFPD 94/A/44