3 papers
gr-qc2025
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…
gr-qc2024
Probing time-dependent scalar wigs with extreme mass ratio inspirals
Matteo Della Rocca, Georgios Antoniou, Leonardo Gualtieri +1
We investigate the gravitational wave emission from extreme mass ratio inspirals, key targets for the upcoming space-based detector LISA, considering the scenario where the lighter…
gr-qc2024
Gravitational quasinormal modes of black holes in quadratic gravity
Georgios Antoniou, Leonardo Gualtieri, Paolo Pani
We study the gravitational perturbations of black holes in quadratic gravity, in which the Einstein-Hilbert term is supplemented by quadratic terms in the curvature tensor. In this…