Black Hole in a Model with Dilaton and Monopole Fields

Details Black Hole in a Model with Dilaton and Monopole Fields Black Hole in a Model with Dilaton and Monopole Fields

2006-11-10

arxiv.org/abs/gr-qc/0611059v1

Int.J.Mod.Phys.D15:2223-2228,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Selected for Honorable Mention in the Gravity Research Foundation Essay Competition, 2006, 7 pages

Scientific paper

We present an exact black hole solution in a model having besides gravity a dilaton and a monopole field. The solution has three free parameters, one of which can be identified with the monopole charge, and another with the ADM mass. The metric is asymptotically flat and has two horizons and irremovable singularity only at $r=0$. The dilaton field is singular only at $r=0$. The dominant and the strong energy condition are satisfied outside and on the external horizon. According to a formulation of the no hair conjecture the solution is "hairy". Also the well know GHS-GM solution is obtained from our solution for certain values of its parameters.

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