Reissner-Nordström Type Black Holes in Dilaton-Axion Gravity

Details Reissner-Nordström Type Black Holes in Dilaton-Axion Gravity Reissner-Nordström Type Black Holes in Dilaton-Axion Gravity

1996-08-09

arxiv.org/abs/gr-qc/9608023v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Some comments added, few misprints corrected

Scientific paper

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--Nordstr\"om 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.

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