233 citations
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4 papers · 2 filters
Hairy AdS black holes with a toroidal horizon in 4D Einstein-nonlinear -model system
Marco Astorino, Fabrizio Canfora, Alex Giacomini +1
An exact hairy asymptotically locally AdS black hole solution with a flat horizon in the Einstein-nonlinear sigma model system in (3+1) dimensions is constructed. The ansatz for th…
New non-linear modified massless Klein--Gordon equation
Felipe A. Asenjo, Sergio A. Hojman
The massless Klein--Gordon equation on arbitrary curved backgrounds allows for solutions which develop "tails" inside the light cone and, therefore, do not strictly follow null geo…
Gravitational domain walls and the dynamics of
Claudio Bunster, Andrés Gomberoff
From the point of view of elementary particle physics the gravitational constant is extraordinarily small. This has led to ask whether it could have decayed to its present valu…
Birefringent light propagation on anisotropic cosmological backgrounds
Felipe A. Asenjo, Sergio A. Hojman
Exact electromagnetic wave solutions to Maxwell equations on anisotropic Bianchi I cosmological spacetime backgrounds are studied. The waves evolving on Bianchi I spacetimes exhibi…