Berlin 2014 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 15: Other topics
GR 15.2: Talk
Tuesday, March 18, 2014, 18:30–18:50, SPA SR220
Hairy Wormholes and Bartnik-McKinnon Solutions — •Olga Hauser1, Rustam Ibadov2, Burkhard Kleihaus1, and Jutta Kunz1 — 1University of Oldenburg — 2Samarkand State University
We consider Lorentzian wormholes supported by a phantom field and threaded by non-trivial Yang-Mills fields, which may be regarded as hair on the Ellis wormhole. Like the Bartnik-McKinnon solutions and their associated hairy black holes, these hairy wormholes form infinite sequences, labeled by the node number k of their gauge field function. We discuss the throat geometry of these wormholes, showing that odd-k solutions may exhibit a double-throat, and evaluate their global charges. We analyze the limiting behavior exhibited by wormhole solutions as the gravitational coupling becomes large. The even-k solutions approach smoothly the Bartnik-McKinnon solutions with k/2 nodes, while the odd-k solutions develop a singular behavior at the throat in the limit of large coupling. In the limit of large k, on the other hand, an embedded Abelian wormhole solution is approached, when the throat is large. For smaller throats the extremal Reissner-Nordström solution plays a fundamental role in the limit.