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GR: Fachverband Gravitation und Relativitätstheorie
GR 404: Schwarze Löcher
GR 404.2: Talk
Thursday, March 8, 2007, 15:30–15:45, KIP Kl. HS
Non-uniqueness, Counterrotation, and Negative Horizon Mass of Einstein-Maxwell-Chern-Simons Black Holes — •Jutta Kunz and Francisco Navarro-Lerida — Institut f. Physik, Universität Oldenburg
Stationary black holes in higher dimensional Einstein-Maxwell-Chern-Simons theories possess surprising properties. When considering the Chern-Simons coefficient as a parameter, critical values of this parameter occur. At a first critical value black holes with vanishing horizon angular velocity, but finite angular momentum arise. As the parameter is increased further, counterrotating black holes appear, whose horizon rotates in the opposite sense to the angular momentum. At a second critical value rotating black holes with vanishing angular momentum emerge, and black holes may possess a negative horizon mass, while their total mass is positive. Charged rotating black holes with vanishing gyromagnetic ratio appear, and black holes are no longer uniquely characterized by their global charges.