384 citations · 1.7k across the 22 of their papers we have counts for
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Two shadows of a single black hole: Vacuum birefringence phenomena within Einstein-nonlinear-electrodynamics
Marco A. A. de Paula, Haroldo C. D. Lima, Pedro V. P. Cunha +2
One of the main features of nonlinear electrodynamics is the existence of an effective geometry that describes the geodesic motion of photons. A detailed analysis of the properties…
Backreaction of perturbations around a stable Light Ring
Pedro V. P. Cunha
Light rings (LRs) - closed circular orbits of null geodesics - are key features of both black holes and horizonless ultracompact objects. While unstable LRs are relevant for the ob…
Good tachyons, bad bradyons: role reversal in Einstein-nonlinear-electrodynamics models
Marco A. A. de Paula, Haroldo C. D. Lima Junior, Pedro V. P. Cunha +2
In relativistic mechanics, the 4-velocity and the 4-momentum need not be parallel. This allows their norm to have a different sign. This possibility occurs in nonlinear electrodyna…
Breaking the north-south symmetry: dyonic spinning black holes with synchronized gauged scalar hair
Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu +1
We study stationary clouds of a gauged, complex scalar field on a magnetically (and possibly electrically as well) charged Kerr-Newman black hole (BH). The existence of a magnetic…
Hypershadows of higher dimensional black objects: a case study of cohomogeneity-one d=5 Myers-Perry
João P. A. Novo, Pedro V. P. Cunha, Carlos A. R. Herdeiro
What does a black hole look like? In 1+3 spacetime dimensions, the optical appearance of a black hole is a bidimensional region in the observer's sky often called the black hole sh…
Analytical proxy to families of numerical solutions: the case study of spherical mini-boson stars
Jianzhi Yang, Pedro V. P. Cunha, Carlos A. R. Herdeiro
The Einstein field equations, or generalizations thereof, are difficult to solve analytically. On the other hand, numerical solutions of the same equations have become increasingly…