43 citations · 109 across the 12 of their papers we have counts for
3 papers · 1 filter
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…
Axion dark matter from frictional misalignment
Alexandros Papageorgiou, Pablo Quílez, Kai Schmitz
We study the impact of sphaleron-induced thermal friction on the axion dark-matter abundance due to the interaction of an axion-like particle (ALP) with a dark non-abelian gauge se…
Rectifying No-Hair Theorems in Gauss-Bonnet theory
Alexandros Papageorgiou, Chan Park, Miok Park
We revisit the no-hair theorems in Einstein-Scalar-Gauss-Bonnet theory with a general coupling function between the scalar and the Gauss-Bonnet term in four dimensional spacetime.…