17 citations · 73 across the 7 of their papers we have counts for
9 papers · 1 filter
The role of shell crossing on the existence and stability of trapped matter shells in spherical inhomogeneous Λ-CDM models
Morgan Le Delliou, Filipe C. Mena, José Pedro Mimoso
We analyse the dynamics of trapped matter shells in spherically symmetric inhomogeneous Λ-CDM models. The investigation uses a Generalised Lemaître-Tolman-Bondi description with in…
First order perturbations of the Einstein-Straus and Oppenheimer-Snyder models
Marc Mars, Filipe C. Mena, Raül Vera
We derive the linearly perturbed matching conditions between a Schwarzschild spacetime region with stationary and axially symmetric perturbations and a FLRW spacetime with arbitrar…
Avoiding closed timelike curves with a collapsing rotating null dust shell
Filipe C. Mena, Jose Natario, Paul Tod
We present an idealised model of gravitational collapse, describing a collapsing rotating cylindrical shell of null dust in flat space, with the metric of a spinning cosmic string…
Gravitational Collapse to Toroidal and Higher Genus asymptotically AdS Black Holes
Filipe C. Mena, Jose Natario, Paul Tod
We match collapsing inhomogeneous as well as spatially homogeneous but anisotropic spacetimes to vacuum static exteriors with a negative cosmological constant and planar or hyperbo…
Linear perturbations of matched spacetimes: the gauge problem and background symmetries
Marc Mars, Filipe C. Mena, Raul Vera
We present a critical review about the study of linear perturbations of matched spacetimes including gauge problems. We analyse the freedom introduced in the perturbed matching by…
Non-linear vector perturbations in a contracting universe
Filipe C. Mena, David J. Mulryne, Reza Tavakol
A number of scalar field models proposed as alternatives to the standard inflationary scenario involve contracting phases which precede the universe's present phase of expansion. A…