22 papers
A Four-Dimensional Gaussian Random Field Generator for Modeling Spatiotemporal Variability in Astrophysical Sources
Alejandro Cárdenas-Avendaño, Diego Rubiera-Garcia, Frederic H. Vincent
Semi-analytic models of black-hole movies require both an emitting flow prescription and a time-dependent source variability. Existing prescriptions are often limited to either equ…
Regular Black Holes in General Relativity from Nonlinear Electrodynamics with de Sitter Cores
A. A. Araújo Filho, Ednaldo L. B. Junior, José Tarciso S. S. Junior +6
We present new regular black hole solutions in general relativity (GR) within a static, spherically symmetric framework governed by a variable equation of state, following the appr…
Black bounce solutions in a realistic dark matter halo from M60*
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo +5
We formulate a Simpson-Visser black bounce solution embedded in a dark matter halo. The latter is modeled using an empirical density profile calibrated from observations of the ell…
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…
Scalar-Electromagnetic Couplings as Source of Deformed Black Hole: From Shadows to Thermodynamic Topology
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo +5
We reconstruct a static and spherically symmetric black hole geometry originally proposed as an effective metric by identifying a consistent matter source derived from a fundamenta…
Observational appearance and photon rings of non-singular black holes from anisotropic fluids
David DÃaz-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…