Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-01-30
Class.Quant.Grav.25:172001,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
7 pages, irrotational limit case added, several minor errors corrected
Scientific paper
10.1088/0264-9381/25/17/172001
The general line element corresponding to the family of algebraically general, gravito-electric, expanding, rotating dust models with one functionally independent zero-order Riemann invariant is constructed. The isometry group is at most one-dimensional but generically trivial. It is shown that the asymmetric solutions with constant ratio of energy density and vorticity amplitude provide first examples of Petrov type I space-times for which the Karlhede classification requires the computation of the third covariant derivative of the Riemann tensor.
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