97 citations · 158 across the 9 of their papers we have counts for
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Axial perturbations of hairy black holes in generalised scalar-tensor theories
Georgios Antoniou, Caio F. B. Macedo, Andrea Maselli +1
Gravitational wave observations can test the validity of General Relativity (GR) in the strong field regime. Certain classes of scalar-tensor theories indeed predict that compact o…
New perspectives on scalar fields in strong gravity
Georgios Antoniou
Recent developments in the field of gravitational physics, including the emergence of gravitational wave astronomy, black hole images, and more accurate telescopes, have allowed us…
Black hole minimum size and scalar charge in shift-symmetric theories
Farid Thaalba, Georgios Antoniou, Thomas P. Sotiriou
It is known that, for shift-symmetric scalars, only a linear coupling with the Gauss-Bonnet invariant can introduce black hole hair. Such hairy black holes have a minimum mass, det…
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…
Stable spontaneously-scalarized black holes in generalized scalar-tensor theories
Georgios Antoniou, Caio F. B. Macedo, Ryan McManus +1
It has been shown that the synergy of a scalar field coupling with both the Ricci scalar and the Gauss-Bonnet invariant significantly affects the properties of scalarized black hol…
Neutron star scalarization with Gauss-Bonnet and Ricci scalar couplings
Giulia Ventagli, Georgios Antoniou, Antoine Lehébel +1
Spontaneous scalarization of neutron stars has been extensively studied in the Damour and Esposito-Farèse model, in which a scalar field couples to the Ricci scalar or, equivalentl…