Showing papers by "Eleftherios Papantonopoulos published in 2008"
TL;DR: In this paper, a six-dimensional Einstein-Maxwell system compactified in an axisymmetric two-dimensional space with one capped regularized conical brane of codimension one was considered.
55 citations
TL;DR: In this article, the perturbative behavior of charged topological-AdS black holes was studied and it was shown that there is a second-order phase transition at a critical temperature at which the mass vanishes.
Abstract: We study the perturbative behaviour of charged topological-AdS black holes. We calculate both analytically and numerically the quasi-normal modes of the electromagnetic and gravitational perturbations. Keeping the charge-to-mass ratio constant, we show that there is a second-order phase transition at a critical temperature at which the mass of the black hole vanishes. We pay special attention to the purely dissipative modes appearing in the spectrum as they behave singularly at the critical point.
31 citations
TL;DR: Five-dimensional gravity with a Gauss-Bonnet term in the bulk and an induced gravity term on a 2-brane of codimension 2 is considered and it is shown that this system admits Bañados-Teitelboim-Zanelli black holes on the 2- Brane which are extended into the bulk with regular horizons.
Abstract: We consider five-dimensional gravity with a Gauss-Bonnet term in the bulk and an induced gravity term on a 2-brane of codimension 2. We show that this system admits Banados-Teitelboim-Zanelli black holes on the 2-brane which are extended into the bulk with regular horizons.
27 citations
TL;DR: In this paper, the perturbative behavior of charged topological-AdS black holes was studied and it was shown that there is a second-order phase transition at a critical temperature at which the mass vanishes.
Abstract: We study the perturbative behaviour of charged topological-AdS black holes. We calculate both analytically and numerically the quasi-normal modes of the electromagnetic and gravitational perturbations. Keeping the charge-to-mass ratio constant, we show that there is a second-order phase transition at a critical temperature at which the mass of the black hole vanishes. We pay special attention to the purely dissipative modes appearing in the spectrum as they behave singularly at the critical point.
27 citations
TL;DR: In this article, the authors study the perturbative behavior of topological black holes and find discontinuities of the quasi-normal modes spectrum at the critical temperature and argue that this is evidence of a second order phase transition.
Abstract: We study the perturbative behaviour of topological black holes. We calculate both analytically and numerically the quasi-normal modes of scalar perturbations. In the case of small black holes we find discontinuities of the quasi-normal modes spectrum at the critical temperature and we argue that this is evidence of a second-order phase transition.
6 citations
TL;DR: In this article, a Gauss-Bonnet term in the bulk and an induced gravity term on a thin brane of codimension-2 was discussed, and it was shown that these black holes can be localized on the brane, and they can be extended further into the bulk by a warp function.
Abstract: We discuss black hole solutions with a Gauss-Bonnet term in the bulk and an induced gravity term on a thin brane of codimension-2. We show that these black holes can be localized on the brane, and they can be extended further into the bulk by a warp function. These solutions have regular horizons and no other curvature singularities appear apart from the string-like ones. The projection of the Gauss-Bonnet term on the brane imposes a constraint relation which dictates the form of matter on the brane and in the bulk.