Limits of isotropic universes with interacting fluids

Abstract

We find various asymptotic limits of universes containing two interacting fluids which interact and exchange energy. We study the finite-time singularities that may develop in these cosmologies and obtain the asymptotic behaviours of the solutions near such blow up regimes.

arXiv comment4 pages, contribution for the Proceedings of the MG13 Meeting on General Relativity, Stockholm, July 2012; v2: eqn numbering corrected