871 citations · 18.5k across the 224 of their papers we have counts for
7 papers · 2 filters
Why do naked singularities form in gravitational collapse?
Pankaj S. Joshi, Naresh Dadhich, Roy Maartens
We investigate what are the key physical features that cause the development of a naked singularity, rather than a black hole, as the end-state of spherical gravitational collapse.…
Kaluza-Klein anisotropy in the CMB
John D Barrow, Roy Maartens
We show that 5-dimensional Kaluza-Klein graviton stresses can slow the decay of shear anisotropy on the brane to observable levels, and we use cosmic microwave background anisotrop…
Gravitational collapse on the brane: a no-go theorem
Marco Bruni, Cristiano Germani, Roy Maartens
We investigate how braneworld gravity affects gravitational collapse and black hole formation by studying Oppenheimer-Snyder-like collapse on a Randall-Sundrum type brane. Without…
General relativistic analysis of peculiar velocities
George F R Ellis, Henk van Elst, Roy Maartens
We give a careful general relativistic and (1+3)-covariant analysis of cosmological peculiar velocities induced by matter density perturbations in the presence of a cosmological co…
Brane-world generalizations of the Einstein static universe
Laszlo Gergely, Roy Maartens
A static Friedmann brane in a 5-dimensional bulk (Randall-Sundrum type scenario) can have a very different relation between the density, pressure, curvature and cosmological consta…
Holonomy and gravitomagnetism
Roy Maartens, Bahram Mashhoon, David Matravers
We analyze parallel transport of a vector field around an equatorial orbit in Kerr and stationary axisymmetric spacetimes that are reflection symmetric about their equatorial plane…