Structure of solutions near the initial singularity for the surface-symmetric Einstein-Vlasov system

Details Structure of solutions near the initial singularity for the surface-symmetric Einstein-Vlasov system Structure of solutions near the initial singularity for the surface-symmetric Einstein-Vlasov system

2004-07-16

arxiv.org/abs/gr-qc/0407062v1

Class.Quant.Grav. 21 (2004) 5333-5346

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages

Scientific paper

10.1088/0264-9381/21/23/003

Results on the behaviour in the past time direction of cosmological models with collisionless matter and a cosmological constant $\Lambda$ are presented. It is shown that under the assumption of non-positive $\Lambda$ and spherical or plane symmetry the area radius goes to zero at the initial singularity. Under a smallness assumption on the initial data, these properties hold in the case of hyperbolic symmetry and negative $\Lambda$ as well as in the positive $\Lambda$ case. Furthermore in the latter cases past global existence of spatially homogeneous solutions is proved for generic initial data. The early-time asymptotics is shown to be Kasner-like for small data.

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