Internal structure of Einstein-Yang-Mills-Dilaton black holes

Abstract

We study the interior structure of the Einstein-Yang-Mills-Dilaton black holes as a function of the dilaton coupling constant $γ\in [0,1]$. For $γ\neq 0$ the solutions have no internal Cauchy horizons and the field amplitudes follow a power law behavior near the singularity. As $γ$ decreases, the solutions develop more and more oscillation cycles in the interior region, whose number becomes infinite in the limit $γ\to 0$.