Black hole simulations in massive scalar Gauss-Bonnet gravity

The presence of singularities in black holes or the incompatibility of quantum physics with General Relativity seems to indicate a breakdown of General Relativity, our standard model of gravity. Resolutions for this breakdown typically involve higher curvature extensions of General Relativity. One example of such an extension is scalar Gauss-Bonnet gravity in which a dynamical scalar field is non-minimally coupled to gravity, and black holes carry a scalar hair.



In this talk, I will discuss the out-of-equilibrium dynamics of a massive scalar field around black holes in scalar Gauss-Bonnet gravity. I will also explore the formation and structure of the hairy solutions, while including the mass term in both the proximity of the black hole and at large distances, by numerically evolving this scalar field around a rotating black hole.