Reissner-Nordström Type Black Holes in Dilaton-Axion Gravity

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A $2p + 5$ parametric family of black holes is constructed in dilaton--axion gravity with $p$ vector fields using a holomorphic representation of U--duality in three dimensions. The metric of the non--extremal black holes has a Reissner--Nordström type structure and generically possesses an internal horizon. However in the extremal limit the generic solution exhibits a dilatonic type null singularity. Only in the case of the orthogonal electric and magnetic charges (if $p>1$) the extremal solution may have a non--singular event horizon.
Some comments added, few misprints corrected

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General Relativity and Quantum Cosmology, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/148840

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/9608023
 http://arxiv.org/abs/gr-qc/9608023

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arXiv