42 citations · 304 across the 37 of their papers we have counts for
39 papers
Stochastic Thermodynamics of Dynamical Thin-Shell Wormholes: Effective Temperatures, Fluctuations and Conditional Quasi-Horizon Unification
Francisco S. N. Lobo, Manuel E. Rodrigues
We develop an effective stochastic and semiclassical framework for dynamical thin-shell wormholes connecting two asymptotic spacetime regions. The Israel junction geometry is separ…
Accretion dynamics of thin and thick disks in charged Kalb-Ramond black holes
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo +5
In this work, we investigate the accretion properties of an electrically charged, static, spherically symmetric black hole in Kalb-Ramond (KR) gravity, where a dimensionless parame…
Black bounce sourced by non-minimally coupled linear electrodynamics and a canonical scalar field through a thin shell at the throat
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo +5
We construct a novel class of black bounce solutions within General Relativity, sourced by a canonical scalar field non-minimally coupled to linear electrodynamics, establishing a…
Entropy dynamics in gravitational collapse: From Minkowski breaking to de Sitter thermodynamics
Francisco S. N. Lobo, Manuel E. Rodrigues
The origin of black hole entropy remains one of the deepest mysteries in modern physics. Two recent developments offer complementary perspectives on this puzzle: the entropy releas…
Entropy release from Minkowski breaking in regular Schwarzschild black holes
Francisco S. N. Lobo, Manuel E. Rodrigues
The classical formation of a Schwarzschild black hole from a regular, non-singular configuration has recently been shown to be impossible within general relativity: the geometry in…
Generalized Unruh temperature for dynamical thin-shell wormholes
Francisco S. N. Lobo, Manuel E. Rodrigues
We unify two independent notions of effective temperature in dynamical thin-shell wormholes: the local acceleration temperature of the throat and the Hawking-like particle-creation…
Thermodynamics of thin-shell wormholes
Francisco S. N. Lobo, Manuel E. Rodrigues
We develop a unified thermodynamic description of dynamic thin-shell wormholes, starting from the transparent (vacuum bulk) case and then relaxing the transparency condition to inc…
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…
Linearized stability of T-duality quantum-inspired thin-shell wormholes
Francisco S. N. Lobo, Manuel E. Rodrigues
Wormholes that are traversable in principle offer fascinating insights into general relativity, yet they typically require exotic matter and suffer from stability issues. We constr…
Black Bounce Solutions from a Self-Interacting 3-Form Field in General Relativity
Francisco S. N. Lobo, Manuel E. Rodrigues
We construct a new class of black-bounce solutions sourced by a self-interacting 3-form field minimally coupled to general relativity and a scalar field. The 3-form field, which na…
Lorentz-violating signatures in quasi-periodic oscillations from a magnetised Kalb-Ramond black hole
Luiz F. G. Rodrigues, Francisco S. N. Lobo, Manuel E. Rodrigues
We investigate the dynamics of charged particles around a Schwarzschild-like black hole sourced by a Kalb-Ramond field and immersed in a uniform external magnetic field. The Kalb-R…
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…
Dyonic Ellis-Bronnikov wormholes from warped extra dimensions
Francisco S. N. Lobo, Miguel A. S. Pinto, Manuel E. Rodrigues
We investigate traversable wormhole solutions within a four-dimensional effective theory derived from a five-dimensional Einstein-Maxwell-Chern-Simons action with a non-minimally c…
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 via nonminimal scalar-electrodynamic couplings
Daniela S. J. Cordeiro, Ednaldo L. B. Junior, José Tarciso S. S. Junior +5
Black-bounce (BB) solutions generalize the spacetimes of black holes, regular black holes, and wormholes, depending on the values of certain characteristic parameters. In this work…
Regular Bardeen black holes within non-minimal scalar-linear electrodynamic couplings
Daniela S. J. Cordeiro, Ednaldo L. B. Junior, José Tarciso S. S. Junior +6
In this paper, we demonstrate that a linear electromagnetic matter source can be constructed for regular black hole solutions, illustrated by the case of the Bardeen black hole. Ou…
Accretion dynamics in black holes with spontaneous Lorentz symmetry breaking
Daniela S. J. Cordeiro, Ednaldo L. B. Junior, José Tarciso S. S. Junior +6
We investigate the spherical accretion of various types of fluids onto a Schwarzschild-like black hole solution modified by a Kalb-Ramond field implementing spontaneous Lorentz sym…
Quantum-inspired wormholes from String T-Duality
Francisco S. N. Lobo, Manuel E. Rodrigues
The intrinsic non-perturbative features of string-theoretic corrections, particularly those arising from T-duality, have been shown to naturally introduce an effective ultraviolet…
Supermassive black hole in NGC 4649 (M60) with a dark matter halo: Impact on shadow measurements and thermodynamic properties
Francisco S. N. Lobo, Jorde A. A. Ramos, Manuel E. Rodrigues
We investigate black hole (BH) solutions embedded in a dark matter (DM) halo, modeled as extensions of the Schwarzschild metric. The DM density profile is constrained by Hubble Spa…
Relativistic structure of a supermassive black hole embedded in the dark matter halo of NGC 4649 (M60)
Francisco S. N. Lobo, Jorde A. A. Ramos, Manuel E. Rodrigues
We construct a static, spherically symmetric black hole (BH) solution embedded within a dark matter (DM) halo, formulated as a non-vacuum extension of the Schwarzschild spacetime.…
Horizons, throats and bounces in hybrid metric-Palatini gravity with a non-zero potential
Gabriel I. Róis, José Tarciso S. S. Junior, Francisco S. N. Lobo +1
This work conducts an in-depth exploration of exact electrically charged solutions, including traversable wormholes, black holes, and black bounces, within the framework of the sca…
Black hole solutions in Cotton gravity coupled to nonlinear electrodynamics
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo +3
The framework of General Relativity (GR) has recently been expanded through the introduction of Cotton Gravity (CG), a theoretical extension proposed by J. Harada. This modified ap…
Free-falling test particles in a charged Kalb-Ramond black hole: gravitational Doppler effect and tidal forces
Daniela S. J. Cordeiro, Ednaldo L. B. Junior, José Tarciso S. S. Junior +5
Space-times exhibiting spontaneous Lorentz symmetry-breaking have recently attracted much attention, with Kalb-Ramond (KR) gravity providing a notable example. In this context, we…
Dyonic regular black bounce solutions in General Relativity
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo +3
This work explores dyonic black bounce (BB) solutions within the framework of General Relativity (GR), coupled with nonlinear electrodynamics (NLED) and scalar fields (SFs). Previo…