Asymptotics of LRS Bianchi type I cosmological models with elastic matter

Details Asymptotics of LRS Bianchi type I cosmological models with elastic matter Asymptotics of LRS Bianchi type I cosmological models with elastic matter

2007-08-29

arxiv.org/abs/0708.3927v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

22 pages, 1 figure. Extended version, to appear in GRG

Scientific paper

In this paper we report on results in the study of spatially homogeneous cosmological models with elastic matter. We show that the behavior of elastic solutions is fundamentally different from that of perfect fluid solutions already in the case of locally rotationally symmetric (LRS) Bianchi type I models; this is true even when the elastic material resembles a perfect fluid very closely. In particular, the approach to the initial singularity is characterized by an intricate oscillatory behavior of the scale factors, while the future asymptotic behavior is described by isotropization rates that differ significantly from those of perfect fluids.

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