New Non-Separable Diagonal Cosmologies

Details New Non-Separable Diagonal Cosmologies New Non-Separable Diagonal Cosmologies

2002-01-28

arxiv.org/abs/gr-qc/0201088v1

Class.Quant.Grav. 12 (1995) 2831-2847

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex, no figures

Scientific paper

10.1088/0264-9381/12/11/013

We find all the perfect fluid G2 diagonal cosmologies with the property that the quotient of the norms of the two orthogonal Killing vectors is constant along each fluid world-line. We find four different families depending each one on two or three arbitrary parameters which satisfy that the metric coefficients are not separable functions. Some physical properties of these solutions including energy conditions, kinematical quantities, Petrov type, the existence and nature of the singularities and whether they contain Friedman-Robertson-Walker cosmologies as particular cases are also included.

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