Charged boson stars and black holes |
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Authors: | Burkhard Kleihaus,Jutta Kunz,Claus Lä mmerzahl,Meike List |
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Affiliation: | 1. Institut für Physik, Universität Oldenburg, Postfach 2503, D-26111 Oldenburg, Germany;2. ZARM, Universität Bremen, Am Fallturm, D-28359 Bremen, Germany |
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Abstract: | We consider boson stars and black holes in scalar electrodynamics with a V-shaped scalar potential. The boson stars come in two types, having either ball-like or shell-like charge density. We analyze the properties of these solutions and determine their domains of existence. When mass and charge become equal, the space–times develop a throat. The shell-like solutions need not be globally regular, but may possess a horizon. The space–times then consist of a Schwarzschild-type black hole in the interior, surrounded by a shell of charged matter, and thus a Reissner–Nordström-type space–time in the exterior. These solutions violate black hole uniqueness. The mass of the black hole solutions is related to the mass of the regular shell-like solutions by a mass formula of the type first obtained within the isolated horizon framework. |
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