256 citations · 1.3k across the 40 of their papers we have counts for
38 papers · 1 filter
End state of the experimental black-hole bomb
Patrik Švančara, Leonardo Solidoro, Pietro Smaniotto +10
Rotating black holes can amplify incident waves through superradiant scattering. When these waves are confined, repeated amplification gives rise to the black-hole bomb instability…
Tachyonic modes as a resonant system in weakly curved stellar spacetimes
Bruno S. Felipe, Maurício Richartz
A real scalar field nonminimally coupled to the curvature of an astrophysical object can develop an effective potential that supports, alongside stable oscillatory solutions, a set…
Exceptional lines in the Kerr-Newman black hole spectrum
João Paulo Cavalcante, Maurício Richartz
We investigate massive scalar perturbations of Kerr-Newman black holes, focusing on the quasinormal mode spectrum in the near-extremal regime. We identify a sequ…
Superradiant scattering by rotating black-bounce black holes
Pedro Henrique Croti Siqueira, Maurício Richartz
We investigate superradiant scattering off a rotating regular black hole described by a black-bounce metric which generalizes the Kerr spacetime of mass and specific angular mo…
Ergodic Hysteresis of the Kerr black hole spectrum
João Paulo Cavalcante, Maurício Richartz, Bruno Carneiro da Cunha
We uncover a cascade of exceptional points (EPs) in the quasinormal mode spectrum of massive scalar perturbations of Kerr black holes, revealing an intricate non-Hermitian structur…
Pseudospectrum of rotating analog black holes
Lucas Tobias de Paula, Pedro Henrique Croti Siqueira, Rodrigo Panosso Macedo +1
Analyzing the stability of quasinormal modes (QNM) is essential for understanding black hole dynamics, particularly in the context of gravitational wave emissions and black hole sp…