46 citations · 153 across the 11 of their papers we have counts for
12 papers
Gravitational ringdown in the Minimal Theory of Massive Gravity
Hugo Roussille, François Larrouturou
This work focuses on gravitational perturbations of black holes in the self-accelerating branch of the Minimal Theory of Massive Gravity (MTMG). This theory is a healthy extension…
Scalar Quasi-Normal Modes of a Loop Quantum Black Hole
Etera R. Livine, Clara Montagnon, Naritaka Oshita +1
We compute the Quasi-Normal Mode (QNM) frequencies for scalar perturbations for modified Schwarzschild black holes in Loop Quantum Gravity. We study the singularity-free polymerize…
Numerical computation of quasinormal modes in the first-order approach to black hole perturbations in modified gravity
Hugo Roussille, David Langlois, Karim Noui
We present a novel approach to the numerical computation of quasi-normal modes, based on the first-order (in radial derivative) formulation of the equations of motion and using a m…
Axial perturbations of black holes in scalar-tensor gravity: near-horizon behaviour
Karim Noui, Hugo Roussille, David Langlois
We consider axial (or odd-parity) perturbations of non-spinning hairy black holes (BH) in shift-symmetric DHOST (Degenerate Higher-Order Scalar-Tensor) theories, including terms qu…
Black hole perturbations in modified gravity theories
Hugo Roussille
The recent first detection of gravitational waves (GWs) from binary black hole mergers has spurred a renewed interest in possible deviations from General Relativity (GR), since the…
On the effective metric of axial black hole perturbations in DHOST gravity
David Langlois, Karim Noui, Hugo Roussille
We study axial (or odd-parity) perturbations about static and spherically symmetric hairy black hole (BH) solutions in shift-symmetric DHOST (Degenerate Higher-Order Scalar-Tensor)…
Linear perturbations of Einstein-Gauss-Bonnet black holes
David Langlois, Karim Noui, Hugo Roussille
We study linear perturbations about non rotating black hole solutions in scalar-tensor theories, more specifically Horndeski theories. We consider two particular theories that admi…
A new look on black hole perturbations in modified gravity
Hugo Roussille
We study the linear perturbations about a nonrotating black hole solution of Horndeski's theory, using a systematic approach that extracts the asymptotic behaviour of perturbations…
Black hole perturbations in modified gravity
David Langlois, Karim Noui, Hugo Roussille
We study the linear perturbations about nonrotating black holes in the context of degenerate higher-order scalar-tensor (DHOST) theories, using a systematic approach that extracts…
Asymptotics of linear differential systems and application to quasi-normal modes of nonrotating black holes
David Langlois, Karim Noui, Hugo Roussille
The traditional approach to perturbations of nonrotating black holes in General Relativity uses the reformulation of the equations of motion into a radial second-order Schrödinger-…
Quadratic DHOST theories revisited
David Langlois, Karim Noui, Hugo Roussille
We present a novel and remarkably simple formulation of degenerate higher-order scalar-tensor (DHOST) theories whose Lagrangian is quadratic in second derivatives of some scalar fi…
Excited hairy black holes: dynamical construction and level transitions
Pablo Bosch, Stephen R. Green, Luis Lehner +1
We study the dynamics of unstable Reissner-Nordström anti-de Sitter black holes under charged scalar field perturbations in spherical symmetry. We unravel their general behavior an…