Global Properties of Locally Spatially Homogeneous Cosmological Models with Matter

Details Global Properties of Locally Spatially Homogeneous Cosmological Models with Matter Global Properties of Locally Spatially Homogeneous Cosmological Models with Matter

1994-09-06

arxiv.org/abs/gr-qc/9409009v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, MPA-AR-94-4

Scientific paper

The existence and nature of singularities in locally spatially homogeneous solutions of the Einstein equations coupled to various phenomenological matter models is investigated. It is shown that, under certain reasonable assumptions on the matter, there are no singularities in an expanding phase of the evolution and that unless the spacetime is empty a contracting phase always ends in a singularity where at least one scalar invariant of the curvature diverges uniformly. The class of matter models treated includes perfect fluids, mixtures of non-interacting perfect fluids and collisionless matter.

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