1 citations · 1 across the 3 of their papers we have counts for
3 papers
Singular space-times with bounded algebraic curvature scalars
Renan B. Magalhães, Gabriel P. Ribeiro, Haroldo C. D. Lima Junior +2
We show that the absence of unbounded algebraic curvature invariants constructed from polynomials of the Riemann tensor cannot guarantee the absence of strong singularities. As a c…
Electrically charged regular black holes in nonlinear electrodynamics: light rings, shadows and gravitational lensing
Marco A. A. de Paula, Haroldo C. D. Lima Junior, Pedro V. P. Cunha +1
Within nonlinear electrodynamics (NED), photons follow null geodesics of an effective geometry, which is different from the geometry of the spacetime itself. Over the last years, s…
Einstein-Maxwell-dilaton neutral black holes in strong magnetic fields: topological charge, shadows and lensing
Haroldo C. D. Lima Junior, Jian-Zhi Yang, Luís C. B. Crispino +2
The light rings (LRs) topological charge (TC) of a spacetime measures the number of stable LRs minus the number of unstable LRs. It is invariant under smooth spacetime deformations…