Singularities in General Relativity coupled to nonlinear electrodynamics
M. Novello, S. E. Perez Bergliaffa, J. M. Salim
Abstract
We study here some consequences of the nonlinearities of the electromagnetic field acting as a source of Einstein's equations on the propagation of photons. We restrict to the particular case of a ``regular black hole'', and show that there exist singularities in the effective geometry. These singularities may be hidden behind a horizon or naked, according to the value of a parameter. Some unusual properties of this solution are also analyzed.
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