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7 papers · 2 filters
Quasinormal modes for massless topological black holes
Rodrigo Aros, Cristian Martinez, Ricardo Troncoso +1
An exact expression for the quasinormal modes of scalar perturbations on a massless topological black hole in four and higher dimensions is presented. The massive scalar field is n…
Supersymmetric extension of the nine-dimensional continuation of the Euler density with N=2
Mokhtar Hassaine, Rodrigo Olea, Ricardo Troncoso
A local supersymmetric extension with N=2 of the dimensional continuation of the Euler-Gauss-Bonnet density from eight to nine dimensions is constructed. The gravitational sector i…
Einstein billiards and overextensions of finite-dimensional simple Lie algebras
Thibault Damour, Sophie de Buyl, Marc Henneaux +1
In recent papers, it has been shown that (i) the dynamics of theories involving gravity can be described, in the vicinity of a spacelike singularity, as a billiard motion in a regi…
de Sitter black hole with a conformally coupled scalar field in four dimensions
Cristian Martinez, Ricardo Troncoso, Jorge Zanelli
A four-dimensional black hole solution of the Einstein equations with a positive cosmological constant, coupled to a conformal scalar field, is given. There is a curvature singular…
Supersymmetry of gravitational ground states
Rodrigo Aros, Cristian Martinez, Ricardo Troncoso +1
A class of black objects which are solutions of pure gravity with negative cosmological constant are classified through the mapping between the Killing spinors of the ground state…
Conformal (super)gravities with several gravitons
Nicolas Boulanger, Marc Henneaux, Peter van Nieuwenhuizen
We construct consistent interacting gauge theories for M conformal massless spin-2 fields ("Weyl gravitons") with the following properties: (i) in the free limit, each field fulfil…