2 papers
gr-qc2025
Extracting linear and nonlinear quasinormal modes from black hole merger simulations
Mark Ho-Yeuk Cheung, Emanuele Berti, Vishal Baibhav +1
In general relativity, when two black holes merge they produce a rotating (Kerr) black hole remnant. According to perturbation theory, the remnant emits "ringdown" radiation: a sup…
gr-qc2025
Unstable chords and destructive resonant excitation of black hole quasinormal modes
Naritaka Oshita, Emanuele Berti, Vitor Cardoso
The quasinormal mode spectrum of black holes is unstable against small modifications of the radial potential describing massless perturbations. We study how these small modificatio…