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GR: Fachverband Gravitation und Relativitätstheorie

GR 404: Schwarze Löcher

GR 404.2: Vortrag

Donnerstag, 8. März 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.