80 citations · 155 across the 9 of their papers we have counts for
9 papers
Shadows and amplitude luminosity of an embedded rotating black hole
Abraao J. S. Capistrano, Antonio C. Gutierrez-Pineres, Carlos H. Coimbra-Araujo
We investigate a rotating black hole embedded in a five-dimensional flat bulk by extending the Kerr metric through the Gurses-Gursey line element. Employing Boyer-Lindquist coordin…
Shadows around the q-metric
J. A. Arrieta-Villamizar, J. M. Velásquez-Cadavid, O. M. Pimentel +2
One crucial problem in relativistic astrophysics is that of the nature of black hole candidates. It is usually assumed that astrophysical black holes are described by the Schwarzsc…
Newman-Janis Ansatz in conformastatic spacetimes
Antonio C. Gutiérrez-Piñeres, Hernando Quevedo
The Newman-Janis Ansatz was used first to obtain the stationary Kerr metric from the static Schwarzschild metric. Many works have been devoted to investigate the physical significa…
Motion of test particles in the field of a naked singularity
K. Boshkayev, E. Gasperin, A. C. Gutierrez-Pineres +2
We investigate the motion of test particles in the gravitational field of a static naked singularity generated by a mass distribution with quadrupole moment. We use the quadrupole-…
Conformastationary disk-haloes in Einstein-Maxwell gravity
Antonio C. Gutiérrez-Piñeres
An exact solution of the Einstein-Maxwell field equations for a conformastationary metric with magnetized disk-haloes sources is worked out in full. The characterization of the nat…
Variational thermodynamics of relativistic thin disks
A C Gutiérrez-Piñeres, C S Lopez-Monsalvo, H Quevedo
We present a relativistic model describing a thin disk system composed of two fluids. The system is surrounded by a halo in the presence of a non-trivial electromagnetic field. We…