N-Dimensional non-abelian dilatonic, stable black holes and their Born-Infeld extension

TL;DR

This paper constructs and analyzes classes of stable, non-asymptotically flat N-dimensional black holes in Einstein-Yang-Mills-Dilaton and Born-Infeld-Dilaton theories, extending solutions to higher dimensions and linking to Brans-Dicke theory.

Contribution

It introduces new N-dimensional black hole solutions in EYMD and EYMBID theories using generalized ansatzes, and demonstrates their stability and connections to Brans-Dicke theory.

Findings

Found stable, non-asymptotically flat black holes in N-dimensional EYMD and EYMBID theories.

Extended dilatonic YM solutions to higher dimensions using generalized Wu-Yang ansatz.

Obtained Bertotti-Robinson type metrics in the limit of vanishing dilaton.

Abstract

We find large classes of non-asymptotically flat Einstein-Yang-Mills-Dilaton (EYMD) and Einstein-Yang-Mills-Born-Infeld-Dilaton (EYMBID) black holes in N-dimensional spherically symmetric spacetime expressed in terms of the quasilocal mass. Extension of the dilatonic YM solution to N-dimensions has been possible by employing the generalized Wu-Yang ansatz. Another metric ansatz, which aided in finding exact solutions is the functional dependence of the radius function on the dilaton field. These classes of black holes are stable against linear radial perturbations. In the limit of vanishing dilaton we obtain Bertotti-Robinson (BR) type metrics with the topology of $AdS_{2}\times S^{N-2}.$ Since connection can be established between dilaton and a scalar field of Brans-Dicke (BD) type we obtain black hole solutions also in the Brans-Dicke-Yang-Mills (BDYM) theory as well.