70 AIM, UMR 7158, CEA/DRF, CNRS, Université Paris Diderot, Irfu/Service d'Astrophysique,
Centre de Saclay, FR-91191 Gif-sur-Yvette, France

The continuum-fitting and the iron line methods are leading techniques capable of probing
the spacetime geometry around astrophysical black hole candidates and testing the no-hair …

In a recent paper we showed that in shift-symmetric Horndeski theory the scalar field is
forced to obtain a nontrivial configuration in black hole spacetimes, unless a linear coupling …

We investigate how a spherically symmetric fluid modifies the Schwarzschild vacuum
solution when there is no exchange of energy-momentum between the fluid and the central …

These lectures give an introduction to the theory of holographic superconductors. These are
superconductors that have a dual gravitational description using gauge/gravity duality. After …

We discuss black holes in an effective theory derived from a superstring model, which
includes a dilaton field, a gauge field, and the Gauss-Bonnet term. Assuming U (1) or SU (2) …

We investigate how a spherically symmetric scalar field can modify the Schwarzschild
vacuum solution when there is no exchange of energy-momentum between the scalar field …

We study magnetically charged classical solutions of a spontaneously broken gauge theory
interacting with gravity. We show that nonsingular monopole solutions exist only if the Higgs …

A linear coupling between a scalar field and the Gauss–Bonnet invariant is the only known
interaction term between a scalar and the metric that: respects shift symmetry; does not lead …

We study static and spherically symmetric black hole (BH) solutions in second-order
generalized Proca theories with nonminimal vector field derivative couplings to the Ricci …