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GR: Fachverband Gravitation und Relativitätstheorie

GR 9: Classical theory of General Relativity I

GR 9.4: Vortrag

Dienstag, 18. März 2014, 12:15–12:35, SPA SR220

Rotating Wormholes — •Burkhard Kleihaus — Universität Oldenburg

Wormholes are solutions of the Einstein equations discribing spacetimes with two asymptotically flat regions connected by a throat. A textbook example is the Ellis wormhole supported by a scalar phantom field. In the static case this solution is known since long a time.

Here we present the stationary rotating generalizations of the Ellis wormhole in four and five dimensions and discuss their physical properties. These solutions are asymptotically flat and free of sigularities. For a fixed size of the throat the angular momentum is bounded from above. The domain of existence is bounded by the extremal black hole solutions. We derive a Smarr-like relation between mass and angular momentum. Also astrophysical implications are considered in the four dimensional case. We address the question of stability and argue that wormholes might be stabilized by rotation.