5 citations · 5 across the 2 of their papers we have counts for
4 papers · 1 filter
Purely radiative perfect fluids with degenerate shear tensor
H. R. Karimian, N. Van den Bergh, L. De Groote
We consider non-rotating geodesic perfect fluid spacetimes which are purely radiative in the sense that the gravitational field satisfies the covariant transverse conditions div H…
Purely radiative perfect fluids
B. Bastiaensen, H. R. Karimian, N. Van den Bergh +1
We study `purely radiative' (div E = div H = 0) and geodesic perfect fluids with non-constant pressure and show that the Bianchi class A perfect fluids can be uniquely characterize…
An exhaustive classification of aligned Petrov type D purely magnetic perfect fluids
Norbert Van den Bergh, Lode Wylleman
We prove that aligned Petrov type D purely magnetic perfect fluids are necessarily locally rotationally symmetric and hence are all explicitly known.
Petrov type I silent universes with G3 isometry group: the uniqueness result recovered
Lode Wylleman, Norbert Van den Bergh
The \emph{silent universe conjecture} (Sopuerta 1997, van Elst et al. 1997) states that the only algebraically general silent universes are the orthogonally spatially homogeneous B…