88 citations · 112 across the 16 of their papers we have counts for
4 papers · 1 filter
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…
Nonminimally coupled scalar field in Schwarzschild--de Sitter spacetime: Geodesic synchrotron radiation
João P. B. Brito, Rafael P. Bernar, Luís C. B. Crispino
We analyze the scalar radiation emitted by a source interacting with a nonminimally coupled scalar field in four-dimensional Schwarzschild--de Sitter spacetime. We obtain the emiss…
Semiclassical bremsstrahlung from a charge radially falling into a Schwarzschild black hole
João P. B. Brito, Rafael P. Bernar, Atsushi Higuchi +1
A semiclassical investigation of the electromagnetic radiation emitted by a charged particle in a radially freely falling motion in Schwarzschild spacetime is carried out. We use q…
Traversable wormholes and light rings
Sérgio V. M. C. B. Xavier, Carlos A. R. Herdeiro, Luís C. B. Crispino
Ultracompact objects (UCOs) are horizonless compact objects that present light rings (LRs) - circular photon orbits. As a result, they could be black hole mimickers. Some years ago…