689 citations · 6.9k across the 84 of their papers we have counts for
83 papers
Greybody factors in scalar-tensor gravity and beyond
Georgios Antoniou, Thomas D. Pappas, Panagiota Kanti
In the framework of the beyond Horndeski action, we consider three subtheories that support scalarised black-hole solutions, and look for modified characteristics compared to GR. W…
Compact Objects in Einstein-scalar-Gauss-Bonnet Theory and beyond
Panagiota Kanti
In the context of General Relativity, black holes are not allowed to possess scalar hair, wormholes are not traversable and particle-like solutions are irregular. Therefore, in ord…
Black holes with primary scalar hair
Athanasios Bakopoulos, Christos Charmousis, Panagiota Kanti +2
We present explicit black holes endowed with primary scalar hair within the shift-symmetric subclass of Beyond Horndeski theories. These solutions depend, in addition to the conven…
Constraining modified gravity theories with scalar fields using black-hole images
Georgios Antoniou, Alexandros Papageorgiou, Panagiota Kanti
We study a number of well-motivated theories of modified gravity with the common overarching theme that they predict the existence of compact objects such as black holes and wormho…
Compact objects of spherical symmetry in beyond Horndeski theories
Athanasios Bakopoulos, Christos Charmousis, Panagiota Kanti +1
We analyse in all generality beyond Horndeski theories of shift symmetry in a static and spherically symmetric spacetime. By introducing four auxiliary functions, we write the fiel…
Traversable wormholes in beyond Horndeski theories
Athanasios Bakopoulos, Christos Charmousis, Panagiota Kanti
We construct a large class of explicit, asymptotically flat and regular wormhole solutions in higher order scalar tensor theories. The solutions are vacuum solutions of scalar tens…