July 9, 2020 to January 31, 2025
Europe/Zurich timezone

[colloquium] Scalar-tensor theories of modified gravity in cosmology and in strong-gravity objects

Mar 23, 2023, 3:00 PM
1h 20m


David Langlois (Universite Paris Cite, CNRS, AstroParticule et Cosmologie)


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.

Presentation materials