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- Universidade Federal do Rio de JaneiroBR853 papers
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5 papers · 2 filters
Luminal Propagation of Gravitational Waves in Scalar-tensor Theories: The Case for Torsion
José Barrientos, Fabrizio Cordonier-Tello, Cristóbal Corral +4
Scalar-tensor gravity theories with a nonminimal Gauss-Bonnet coupling typically lead to an anomalous propagation speed for gravitational waves, and have therefore been tightly con…
On the properties of a Static and a Stationary Charged Black Hole in Gravity
Carlos Conde, Cristian Galvis, Eduard Larrañaga
In a recent paper, Nashed and Capozziello presented a new class of charged, spherically symmetric black hole solutions of gravity with an asymptotic flat or (anti-)de Sitter…
A general local causality principle of space-time
Benjamin Calvo-Mozo
We propose a generalisation of the local causality principle of space-time, asserting that it holds for all regimes of motion, including superluminal motions. It assumes the existe…
Properties of the Innermost Stable Circular Orbit of a spinning particle moving in a rotating Maxwell-dilaton black hole background
Carlos Conde, Cristian Galvis, Eduard Larrañaga
In this paper we investigate the innermost stable circular orbit (ISCO) of a spinning test particle moving in the rotating Maxwell-dilaton black hole spacetime. By using the Mathis…
Linear and Second-order Geometry Perturbations on Spacetimes with Torsion
Fernando Izaurieta, Eduardo Rodríguez, Omar Valdivia
In order to study gravitational waves in any realistic astrophysical scenario, one must consider geometry perturbations up to second order. Here, we present a general technique for…