43 citations · 105 across the 11 of their papers we have counts for
12 papers
Spectral instabilities in the time domain
Taillte May, Adrien Kuntz, Nicola Franchini +2
We investigate the effect of a spectral instability on the time domain waveform using a one-dimensional double Pöschl-Teller model. By analytically following successive scatterings…
Second-order scattering response of a Schwarzschild black hole
Bruno Bucciotti, Jaime Redondo-Yuste, Adrien Kuntz +2
Gravitational waves couple in a nonlinear fashion in the vicinity of a black hole. Black hole perturbation theory can be readily applied to compute the magnitude of this coupling,…
Ringdown and lensing of triple systems
Vitor Cardoso, Giuseppe Ficarra, Jaime Redondo-Yuste +1
Triple systems have progressively been recognized as ubiquitous in our Universe and provide a good testing ground for wave generation and propagation in nontrivial environments. We…
Axial Oscillations of Viscous Neutron Stars
Sofía Bussières, Jaime Redondo-Yuste, José Javier Ortega Gómez +1
The oscillation modes of stars play an important role in observations, and on the understanding of stellar stability properties. The role of viscosity in the oscillation modes of c…
Superradiant amplification by rotating viscous compact objects
Jaime Redondo-Yuste, Vitor Cardoso
We study fluctuations of rotating viscous stars, using the causal relativistic hydrodynamics of Bemfica, Disconzi, Kovtun, and Noronha. We derive, in a slow-rotation approximation,…
Ringdown nonlinearities in the eikonal regime
Bruno Bucciotti, Vitor Cardoso, Adrien Kuntz +2
The eikonal limit of black hole quasinormal modes (the large multipole limit ) can be realized geometrically as a next-to-leading order solution to the geometric optics…
The dynamical response of viscous objects to gravitational waves
Valentin Boyanov, Vitor Cardoso, Kostas D. Kokkotas +1
We study the dynamical response of viscous materials to gravitational waves, in the context of a fully relativistic theory of fluid dynamics. For the first time, we calculate oscil…
Dynamical Lensing Tomography of Black Hole Ringdown
Zhen Zhong, Vitor Cardoso, Yifan Chen
Strong gravitational lensing occurs when photons pass through the vicinity of a black hole. We investigate this phenomenon in the context of a gravitational-wave event, specificall…
Impact of a plasma on the relaxation of black holes
Enrico Cannizzaro, Thomas F. M. Spieksma, Vitor Cardoso +1
Our universe is permeated with interstellar plasma, which prevents propagation of low-frequency electromagnetic waves. Here, we show that two dramatic consequences arise out of suc…
Hushing black holes: tails in dynamical spacetimes
Vitor Cardoso, Gregorio Carullo, Marina De Amicis +6
Stationary, asymptotically flat, black hole solutions of the vacuum field equations of General Relativity belong to the Kerr family. But how does one approach this state, dynamical…
Relativistic aerodynamics of spinning black holes
Conor Dyson, Jaime Redondo-Yuste, Maarten van de Meent +1
Astrophysical black holes do not exist in vacuum, and their motion is affected by the galactic environment. As a black hole moves it attracts stars and matter, creating a wake that…
Ringdown of a dynamical spacetime
Jaime Redondo-Yuste, David Pereñiguez, Vitor Cardoso
The gravitational waves emitted (some time) after two black holes merge are well described by the theory of linear perturbations on a spacetime characterized by the mass and spin o…