70 citations · 78 across the 4 of their papers we have counts for
5 papers · 1 filter
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…
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…
Shadows of black holes with dark matter halo
Sérgio V. M. C. B. Xavier, Haroldo C. D. Lima Junior, Luís C. B. Crispino
We investigate the shadow of an exact black hole solution of Einstein's equations recently proposed by Cardoso et al., to describe a supermassive black hole immersed in a dark matt…
Absorption by stringy black holes
Sérgio Vinicius M. C. B. Xavier, Carolina L. Benone, Luís C. B. Crispino
We investigate the absorption of planar massless scalar waves by a charged rotating stringy black hole, namely a Kerr--Sen black hole. We compute numerically the absorption cross s…
Shadows of charged rotating black holes: Kerr-Newman versus Kerr-Sen
Sérgio Vinicius M. C. B. Xavier, Pedro V. P. Cunha, Luís C. B. Crispino +1
Celebrating the centennial of its first experimental test, the theory of General Relativity (GR) has successfully and consistently passed all subsequent tests with flying colours.…