45 citations · 101 across the 4 of their papers we have counts for
6 papers
Conditional escape of gravitons from the brane
Jannie A. Leach, William M. Lesame
In this paper we consider a cosmological Friedmann Robertson Walker brane world imbedded in a 5-dimensional anti-de Sitter Schwarzschild bulk. We show, using potential diagrams, th…
Nonperturbative gravito-magnetic fields
Carlos Sopuerta, Roy Maartens, George Ellis +1
In a cold matter universe, the linearized gravito-magnetic tensor field satisfies a transverse condition (vanishing divergence) when it is purely radiative. We show that in the non…
Newtonian-like and anti-Newtonian universes
Roy Maartens, William Lesame, George Ellis
In an irrotational dust universe, the locally free gravitational field is covariantly described by the gravito-electric and gravito-magnetic tensors and . In Newto…
Consistency of dust solutions with div H=0
Roy Maartens, William Lesame, George Ellis
One of the necessary covariant conditions for gravitational radiation is the vanishing of the divergence of the magnetic Weyl tensor H_{ab}, while H_{ab} itself is nonzero. We comp…
Integrability of irrotational silent cosmological models
H van Elst, C Uggla, W Lesame +2
We revisit the issue of integrability conditions for the irrotational silent cosmological models. We formulate the problem both in 1+3 covariant and 1+3 orthonormal frame notation,…
Integrability Conditions for Irrotational Dust with a Purely Electric Weyl Tensor: A Tetrad Analysis
W. M. Lesame, P. K. S. Dunsby, G. F. R. Ellis
All spacetimes for an irrotational collisionless fluid with a purely electric Weyl tensor, with spacetime curvature determined by the exact Einstein field equations, are shown to b…