6 papers
Resonances, black hole mimickers and the greenhouse effect: consequences for gravitational-wave physics
Vitor Cardoso, Francisco Duque
Ultracompact objects with photonspheres are known to mimic many observational features of black holes. It has been suggested that anomalous tidal heating or the presence of resonan…
The light ring and the appearance of matter accreted by black holes
Vitor Cardoso, Francisco Duque, Arianna Foschi
The geometry of black hole spacetimes can be probed with exquisite precision in the gravitational-wave window, and possibly also in the optical regime. We study the accretion of br…
Gravitational tuning forks and hierarchical triple systems
Vitor Cardoso, Francisco Duque, Gaurav Khanna
We study gravitational wave (GW) emission in the strong-field regime by a hierarchical triple system composed of a binary system placed in the vicinity of a supermassive black hole…
Tidal effects and disruption in superradiant clouds: a numerical investigation
Vitor Cardoso, Francisco Duque, Taishi Ikeda
The existence of light, fundamental bosonic fields is an attractive possibility that can be tested via black hole observations. We study the effect of a tidal field -- caused by a…
Environmental effects in GW physics: tidal deformability of black holes immersed in matter
Vitor Cardoso, Francisco Duque
The tidal deformability of compact objects by a companion has a detectable imprint in the gravitational waves emitted by a binary system. This effect is governed by the so-called t…
Motion in time-periodic backgrounds with applications to ultralight dark matter haloes at galactic centers
Mateja Bošković, Francisco Duque, Miguel C. Ferreira +2
We consider motion in spherically symmetric but time-dependent backgrounds. This problem is of interest, for example, in the context of ultralight dark matter, where galactic haloe…