23 citations · 75 across the 7 of their papers we have counts for
7 papers
Stable three-dimensional (un)charged AdS gravastars in gravity's rainbow
H. Barzegar, M. Bigdeli, G. H. Bordbar +1
In this work, we study the three-dimensional AdS gravitational vacuum stars (gravastars) in the context of gravity's rainbow theory. Then we extend it by adding the Maxwell electro…
Future attractors of Bianchi types II and V cosmologies with massless Vlasov matter
Hamed Barzegar
It is shown that the generalized Collins--Stewart radiation and Milne solutions are attractors of the massless Einstein--Vlasov system for Bianchi types II and V spacetimes, respec…
Stable cosmologies with collisionless charged matter
Hamed Barzegar, David Fajman
It is shown that Milne models (a subclass of FLRW spacetimes with negative spatial curvature) are nonlinearly stable in the set of solutions to the Einstein-Vlasov-Maxwell system,…
On the energy of the Horowitz-Myers metrics
Hamed Barzegar, Piotr T. Chruściel, Michael Hörzinger +2
We present results supporting the Horowitz-Myers conjecture, that the Horowitz-Myers metrics minimise energy in the relevant classes of metrics.
Isotropization of Slowly Expanding Spacetimes
Hamed Barzegar, David Fajman, Gernot Heißel
We show that the homogeneous, massless Einstein-Vlasov system with toroidal spatial topology and diagonal Bianchi type I symmetry for initial data close to isotropic data isotropiz…
On the total mass of asymptotically hyperbolic manifolds
Hamed Barzegar, Piotr T. Chruściel, Luc Nguyen
Generalising a proof by Bartnik in the asymptotically Euclidean case, we give an elementary proof of positivity of the hyperbolic mass near the hyperbolic space. It is a pleasure t…
Energy in higher-dimensional spacetimes
Hamed Barzegar, Piotr T. Chruściel, Michael Hörzinger
We derive expressions for the total Hamiltonian energy of gravitating systems in higher dimensional theories in terms of the Riemann tensor, allowing a cosmological constant $Λ\in…