Reinaldo J. Gleiser

Astrophysical limits on quantum gravity motivated birefringence

We obtain observational upper bounds on a class of quantum gravity related birefringence effects, by analyzing the presence of linear polarization in the optical and ultraviolet spectrum of some distant sources. In the notation of Gambini and Pullin we find

Linear stability of Einstein-Gauss-Bonnet static spacetimes : Vector and scalar perturbations

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Gravitational instabilities in Kerr spacetimes

We study the stability under linear perturbations of a class of static solutions of Einstein-Gauss-Bonnet gravity in

Gravitational instability of static spherically symmetric Einstein-Gauss-Bonnet black holes in five and six dimensions

D=n+2

Closed timelike curves and geodesics of Godel-type metrics

dimensions with spatial slices of the form

Obstructions on the horizon geometry from string theory corrections to Einstein gravity

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Inspiralling Black holes: The close limit

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Static black hole solutions with a self-interacting conformally coupled scalar field

{\ensuremath{\Sigma}}_{\ensuremath{\kappa}}^{n}

Second order perturbations of a Schwarzschild black hole

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