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Stability of a black hole and the speed of gravity waves within self-tuning cosmological models
Eugeny Babichev, Christos Charmousis, Gilles Esposito-Farese +1
The gravitational wave event GW170817 together with its electromagnetic counterparts constrains the speed of gravity to be extremely close to that of light. We first show, on the e…
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…
Black holes and solitons in an extended Proca theory
Eugeny Babichev, Christos Charmousis, Mokhtar Hassaine
We study a massive vector tensor theory that acquires mass via a standard Proca term but also via a higher order term containing an explicit coupling to curvature. We find static s…
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…