Asymptotic analysis of spatially inhomogeneous stiff and ultra-stiff cosmologies

Details Asymptotic analysis of spatially inhomogeneous stiff and ultra-stiff cosmologies Asymptotic analysis of spatially inhomogeneous stiff and ultra-stiff cosmologies

2005-06-18

arxiv.org/abs/gr-qc/0506097v1

Class.Quant.Grav. 22 (2005) 3073-3082

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Accepted by CQG

Scientific paper

10.1088/0264-9381/22/14/016

We calculate analytically the past asymptotic decay rates close to an initial singularity in general G_0 spatially inhomogeneous perfect fluid models with an effective equation of state which is stiff or ultra-stiff (i.e., $\gamma \ge 2$). These results are then supported by numerical simulations in a special class of G_2 cosmological models. Our analysis confirms and extends the BKL conjectures and lends support to recent isotropization results in cosmological models of current interest (with $\gamma > 2$).

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