317 citations · 1.9k across the 62 of their papers we have counts for
15 papers · 1 filter
Light trajectories and optical appearances in asymptotically Anti-de Sitter-Schwarzschild and black string space-times
G. Alencar, Arthur Lima, Diego Rubiera-Garcia +1
The Event Horizon Telescope (EHT) imaging of the central objects in the M87 and Milky Way galaxies provide compelling evidence that these objects are consistent with (Kerr) black h…
Twinkle twinkle dark star: Oscillating profiles from dark matter scalar solitons
Nicolas Aimar, Caio F. B. Macedo, João Luís Rosa +1
Real scalar fields, e.g. the axion, cannot condensate into stationary solitonic configurations to form starlike structures, eventually either dispersing or collapsing. However, by…
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…
Observational appearance and photon rings of non-singular black holes from anisotropic fluids
David Díaz-Guerra, Angel Rincon, Diego Rubiera-Garcia
We consider the optical appearance of a non-singular, spherically symmetric black hole from Eddington-inspired Born-Infeld gravity coupled to anisotropic fluids. Such a black hole…
Multi-photon ring structure of reflection-asymmetric traversable thin-shell wormholes
Caio F. B. Macedo, João Luís Rosa, Diego Rubiera-Garcia +1
We consider the observational signatures of thin accretion disks around a reflection-asymmetric traversable thin-shell wormhole. This wormhole, built in the framework of Palatini $…
Astrometric and polarimetric imprints of hot-spots orbiting parametrized black holes
João Luís Rosa, Nicolas Aimar, Diego Rubiera-Garcia
We analyze the observational features of hot-spots orbiting parametrized black hole (BH) spacetimes. We select a total of four BH spacetimes, two from the Johanssen-Psaltis (JP) pa…