221 citations · 398 across the 5 of their papers we have counts for
5 papers
Astrophysical constraints on compact objects in 4D Einstein-Gauss-Bonnet gravity
Christos Charmousis, Antoine Lehébel, Evangelos Smyrniotis +1
We study the properties of compact objects in a particular 4D Horndeski theory originating from higher dimensional Einstein-Gauss-Bonnet gravity. Remarkably, an exact vacuum soluti…
The sound of DHOST
Eugeny Babichev, Antoine Lehébel
We show that, in generic higher-order scalar-tensor theories which avoid the Ostrogradsky instability, the presence of a scalar field significantly modifies the propagation of matt…
A no-hair theorem for stars in Horndeski theories
Antoine Lehébel, Eugeny Babichev, Christos Charmousis
We consider a generic scalar-tensor theory involving a shift-symmetric scalar field and minimally coupled matter fields. We prove that the Noether current associated with shift-sym…
Asymptotically flat black holes in Horndeski theory and beyond
Eugeny Babichev, Christos Charmousis, Antoine Lehébel
We find spherically symmetric and static black holes in shift-symmetric Horndeski and beyond Horndeski theories. They are asymptotically flat and sourced by a non trivial static sc…
Black holes in a cubic Galileon universe
Eugeny Babichev, Christos Charmousis, Antoine Lehébel +1
We find and study the properties of black hole solutions for a subclass of Horndeski theory including the cubic Galileon term. The theory under study has shift symmetry but not ref…