23 citations · 37 across the 6 of their papers we have counts for
6 papers · 1 filter
Matter environments around black holes: geodesics, light rings, and ultracompact configurations
Dylan S. Fonseca, Caio F. B. Macedo, Mateus Malato Corrêa +1
Astrophysical black holes are invariably embedded in matter environments whose gravitational influence can alter key strong-field features of the spacetime. In this work, we invest…
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…
Time evolution of perturbations in quasi-Schwarzschild black holes
Orival R. de Medeiros, Mateus Malato Corrêa, Caio F. B. Macedo
Parametric deviations of quasinormal modes~(QNMs) is a common feature of beyond General Relativity (GR) theories. For theories with additional degrees of freedom, such as scalars a…
Black hole spectral instabilities in the laboratory: Shallow water analogue
Mateus Malato Corrêa, Caio F. B. Macedo, Rodrigo Panosso Macedo +1
Small deviations in the spacetime around black holes can lead to instabilities in the underlying quasinormal mode spectrum, potentially altering the hierarchy of its overtones. A p…
Quasibound state reminiscent in de-Sitter black holes: Quasinormal modes and the decay of massive fields
Mateus Malato Corrêa, Caio F. B. Macedo, João Luís Rosa
Massive perturbations in asymptotic flat black holes leave a distinct signature in their late-time evolution `tail': an oscillatory behavior modulated by the Compton wavelength of…
Tidal forces in dirty black hole spacetimes
Haroldo C. D. Lima Junior, Mateus M. Corrêa, Caio F. B. Macedo +1
Black holes can be inserted in very rich astrophysical environments, such as accretion disks. Although isolated black holes are simple objects in general relativity, their accretio…