Bonn 2010 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 2: Schwarze Löcher 1

GR 2.1: Vortrag

Montag, 15. März 2010, 10:40–11:00, JUR K

Generalized Weyl solutions in five-dimensional Einstein-Gauss-Bonnet theory: the static black ring — •Burkhard Kleihaus, Jutta Kunz, and Eugen Radu — Universität Oldenburg

We argue that the Weyl coordinates and the rod-structure employed to construct static axisymmetric solutions in higher dimensional Einstein gravity can be generalized to the Einstein-Gauss-Bonnet theory. As a concrete application of the general formalism, we present numerical evidence for the existence of static black ring solutions in Einstein-Gauss-Bonnet theory in five spacetime dimensions. They approach asymptotically the Minkowski background and are supported against collapse by a conical singularity in the form of a disk. An interesting feature of these solutions is that the Gauss-Bonnet term reduces the conical excess of the static black rings. Analogous to the Einstein-Gauss-Bonnet black strings, for a given mass the static black rings exist up to a maximal value of the Gauss-Bonnet coupling constant α′. Moreover, in the limit of large ring radius, the suitably rescaled black ring maximal value of α′ and the black string maximal value of α′ agree.