Description
Certain scalar-tensor theories remain viable despite stringent observational constraints from the Solar System due to a Z_2 symmetry that keeps the scalar field dormant in the weak-field regime. However, extreme-gravity environments can trigger a phase transition that promotes a spontaneous growth of the scalar field around compact objects like black holes and neutron stars. This is the phenomenon of spontaneous scalarization. In this talk, I will discuss how certain scalar-tensor-Gauss-Bonnet theories, which allow for the spontaneous scalarization of black holes, can be constrained using current gravitational-wave data.
Auteur principal
Leong Khim Wong
(IPhT, Université Paris-Saclay)
