Speaker
David Langlois
(Universite Paris Cite, CNRS, AstroParticule et Cosmologie)
Description
This talk will present theories of modified gravity that contain a single scalar degree of freedom, in particular the very general framework of Degenerate Higher-Order Scalar-Tensor (DHOST) theories, which includes and extends Horndeski and Beyond Horndeski theories. I will then discuss cosmological aspects of these theories, notably the dynamics of cosmological perturbations. I will also present some results on non-rotating black holes and their perturbations in the context of DHOST theories.
