Thin-shell wormholes with a generalized Chaplygin gas in Einstein-Born-Infeld theory: construction and stability (presentación oral, coautor)

ERNESTO F. EIROA; GRISELDA FIGUEROA AGUIRRE

Villa General Belgrano, Córdoba

Conferencia; Grav13; 2013

FAMAF, Universidad de Córdoba, Argentina

We construct spherically symmetric wormholes in Born-Infeld electrodynamics coupled to Einstein gravity by using the thin-shell formalism. From a black hole solution, we remove the the inner part of the manifold containing the horizon and paste the resulting geometry with an identical copy of it, in order to build the wormhole. In this form, a new manifold is obtained which has no horizons and the surface where the two parts join corresponds to the throat of the wormhole, where the energy conditions are violated. For this reason, the presence of exotic matter is needed, which in this work is modeled by a generalized Chaplygin gas. We analyze the stability of these objects under radial perturbations, for different values of the Born-Infeld parameter and the charge, and we compare the results with those obtained in a previous work for Maxwell electrodynamics. We show that the stability region in the parameter space reduces and then disappears as the value of the Born-Infeld parameter is modified in the sense of a larger departure from Maxwell theory.