Speaker
Description
Black holes beyond General Relativity may carry non-standard charges that impact their phenomenology. I will present the scalar charge that is induced by the scalar-Gauss-Bonnet coupling and how it is affected by the presence of a nontrivial kinetic term K(X). I will discuss the corresponding kinetic screening in the asymptotically flat, static solution first. I will then turn to the case where self-accelerating cosmology is driven by K(X), finding that the time-dependence of the scalar field opens up the parameter space, turning the black-hole scalar charge from secondary to primary. I will provide a stability analysis and a measure of the intensity of the kinetic screening from the quartic dispersion relation of the mixed scalar and gravitational modes.
