33 citations · 107 across the 10 of their papers we have counts for
10 papers
Growing Hair on the extremal black hole
B. Harms, A. Stern
We show that the nonlinear model in an asymptotically space-time admits a novel local symmetry. The field action is assumed to be quartic in the nonlinear model fie…
Spinning -model solitons in Anti-de Sitter space
B. Harms, A. Stern
We obtain numerical solutions for rotating topological solitons of the nonlinear -model in three-dimensional Anti-de Sitter space. Two types of solutions, and , are fo…
Three dimensional gravity from ISO(2,1) coset models
R. Casadio, B. Harms
Starting from a WZWN action in the ISO(2,1) Poincare' group which describes a bosonized spinning string in 2+1 Minkowski space-time, we show that a sequence of non-trivial compacti…
Energy Absorption by the Dilaton Field around a Rotating Black Hole in a Binary System
R. Casadio, B. Harms
In this paper we analyze a binary system consisting of a star and a rotating black hole. The electromagnetic radiation emitted by the star interacts with the background of the blac…
Charged Dilatonic Black Holes: String frame vs Einstein frame
R. Casadio, B. Harms
The descriptions of Reissner-Nordstroem and Kerr-Newman dilatonic black holes in the Einstein frame are compared to those in the string frame. We describe various physical measurem…
Perturbations in the Kerr-Newman Dilatonic Black Hole Background: Maxwell Waves, the Dilaton Background and Gravitational Lensing
R. Casadio, B. Harms
In this paper we continue the analysis of our previous papers and study the affect of the existence of a non-trivial dilaton background on the propagation of electromagnetic waves…