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Geodesic analysis, absorption and scattering in the static Hayward spacetime
Marco A. A. de Paula, Luiz C. S. Leite, Luís C. B. Crispino
We investigate the propagation of massless particles and scalar fields in the background of Hayward regular black holes. We compute the absorption and scattering cross sections and…
Scattering by stringy black holes
Sérgio V. M. C. B. Xavier, Carolina L. Benone, Luiz C. S. Leite +1
We study the scattering of axially incident massless scalar waves by a charged and rotating black hole solution from heterotic string theory called the Kerr-Sen black hole. We comp…
Gravitational bremsstrahlung and the Fulling-Davies-Unruh thermal bath
João P. B. Brito, Luís C. B. Crispino, Atsushi Higuchi
The electromagnetic radiation emitted by an accelerated charged particle can be described theoretically as the interaction of the charge with the so-called Fulling-Davies-Unruh the…
Echoes from bounded universes
Renan B. Magalhães, Andreu Masó-Ferrando, Flavio Bombacigno +2
We construct a general class of modified Ellis wormholes, where one asymptotic Minkowski region is replaced by a bounded 2-sphere core, characterized by asymptotic finite areal rad…
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…
Parametrized black holes: Scattering investigation
Renan B. Magalhães, Luiz C. S. Leite, Luís C. B. Crispino
We study the scattering of light-like geodesics and massless scalar waves by a static Konoplya-Zhidenko black hole, considering the case that the parametrized black hole solution c…