Isotropic cosmologies in Weyl geometry

Details Isotropic cosmologies in Weyl geometry Isotropic cosmologies in Weyl geometry

2004-02-09

arxiv.org/abs/gr-qc/0402039v1

Class.Quant.Grav. 21 (2004) 3043-3056

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, 4 figures

Scientific paper

10.1088/0264-9381/21/12/014

We study homogeneous and isotropic cosmologies in a Weyl spacetime. We show that for homogeneous and isotropic spacetimes, the field equations can be reduced to the Einstein equations with a two-fluid source. We write the equations as a two-dimensional dynamical system and analyze the qualitative, asymptotic behavior of the models. We examine the possibility that in certain theories the Weyl 1-form may give rise to a late accelerated expansion of the Universe and conclude that such behaviour is not met as a generic feature of the simplest cosmologies.

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