MG13 - Talk detail |
Participant |
Radu, Eugen | |||||||
Institution |
Institute of Physics - Carl v. Ossietzkystr. 9-11 - Oldenburg - - Germany | |||||||
Session |
BH1 |
Accepted |
Yes |
Order |
1 |
Time |
30' | |
Talk |
Oral abstract |
Title |
Black rings in more than five dimensions | |||||
Co-authors | Burkhard Kleihaus and Jutta Kunz | |||||||
Abstract |
We present evidence for the existence of balanced black ring solutions in $d\geq 6$ spacetime dimensions. They approach asymptotically the Minkowski background and have a regular event horizon with $S^1\times S^{d-3}$ topology. The black ring solutions are found within a nonperturbative approach, by solving numerically the Einstein equations with suitable boundary conditions. |
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Session |
BH3 |
Accepted |
Yes |
Order |
18 |
Time |
10' | |
Talk |
Oral abstract |
Title |
Stable black holes with non-abelian hair | |||||
Co-authors | Yves Brihaye, D. H. Tchrakian | |||||||
Abstract |
We construct finite mass, asymptotically flat black hole solutions in $d=5$ Einstein--Yang-Mills--Chern-Simons theory. Our results indicate the existence of a second order phase transition between Reissner-Nordstr\"om solutions and the non-Abelian black holes which generically are thermodynamically preferred. Some of the non-Abelian configurations are also stable under linear, spherically symmetric perturbations. In addition a solution in closed form describing an extremal black hole with non-Abelian hair is found for a special value of the Chern-Simons coupling constant. Similar results are found in $d=4$ Einstein--Yang-Mills theory augmented with higher order curvature terms of the gauge field. |
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