Cosmological solutions with nonlinear bulk viscosity

Details Cosmological solutions with nonlinear bulk viscosity Cosmological solutions with nonlinear bulk viscosity

1997-10-06

arxiv.org/abs/gr-qc/9710029v1

Class.Quant.Grav. 14 (1997) 3363-3375

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages Latex (IOP style); to appear Class. Quantum Grav

Scientific paper

10.1088/0264-9381/14/12/019

A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating. The asymptotic stability of the de Sitter and Friedmann solutions is investigated. The former is stable for bulk viscosity index $q<1$ and the latter for $q>1$. New solutions are obtained in the weakly nonlinear regime for $q=1$. These solutions are singular and some of them represent a late-time inflationary era.

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