2 citations · 2 across the 2 of their papers we have counts for
9 papers
Exceptional Points and Resonance in Black Hole Ringdown
Rodrigo Panosso Macedo, Takuya Katagiri, Kei-ichiro Kubota +1
We propose an exceptional-point (EP) framework for black-hole ringdown beyond the standard quasinormal-mode (QNM) paradigm. It provides a first-principles characterization of the r…
Total absorption of tailored incoming signals by black holes
Furkan Tuncer, Vitor Cardoso, Rodrigo Panosso Macedo +1
We uncover a new class of phenomena in gravitational physics, whereby resonances in the complex plane can be excited via tailored time-dependent scattering. We show that specific f…
Spectral instability of horizonless compact objects within astrophysical environments
Kyriakos Destounis, Mateus Malato Corrêa, Caio F. B. Macedo +1
Recent non-modal analyses have uncovered spectral instabilities in the quasinormal-mode spectrum of black holes; a phenomenon that intriguingly extends to spherically-symmetric exo…
Asymptotics and Universality in Black Holes: from the quasinormal Weyl's law to the binary merger waveform
José Luis Jaramillo, Lamis Al Sheikh, Jérémy Besson +7
Current state-of-the-art approaches to black hole (BH) dynamics, encompassing several effective approximation schemes, offer a remarkable control of the quantitative aspects of str…
Limiting geometry and spectral instability in Schwarzschild--de Sitter spacetimes
Yi Zhou, Rodrigo Panosso Macedo
We revisit the quasinormal mode (QNM) problem in Schwarzschild--de Sitter spacetimes providing a unified infrastructure tailored for studying limiting configurations. Geometrically…
Gravitational-wave tails and memory effect for mergers in astrophysical environments
Qassim Alnasheet, Vitor Cardoso, Francisco Duque +1
Gravitational waves from the coalescence of compact objects carry information about their dynamics and the spacetime in regions where they are evolving. In particular, late-time ta…