12 papers
Black hole mass and distance from accretion disk astrophysical observables
J. R. Fernández-Moreno, A. González-Juárez, A. Herrera-Aguilar
In this work we derive novel analytical expressions for the mass and distance of a Schwarzschild black hole (BH), as well as for the orbital radius of test particles orbiting it, i…
Mass and distance of AGN black holes from warped accretion disks
Adriana González-Juárez, Alfredo Herrera-Aguilar
Along the last ten years, a general relativistic method has been developed to generate analytical expressions for the black hole (BH) parameters in terms of observables, namely the…
Cosmological redshift of a Schwarzschild-de Sitter black hole: Towards estimating the Hubble constant
Deborah Villaraos, Alfredo Herrera-Aguilar, Mehrab Momennia +1
In this work we estimate the parameters of several astrophysical black holes hosted at the core of active galactic nuclei by studying the kinematics of test objects in their accret…
A differential-geometry approach to black hole characterization of megamaser systems in static spherically symmetric spacetimes
Santiago González-Salud, Rodrigo Bárcena-Ramos, Alfredo Herrera-Aguilar +1
We develop a geometry-first model that maps measured thin-disk water megamaser observables--sky angles, frequency shifts, their secular drifts and the angular redshift rate--to the…
Testing conformal gravity using the supermassive black hole NGC 4258
Diego A. MartÃnez-Valera, Alfredo Herrera-Aguilar
In this paper, we perform a Bayesian statistical fit to estimate the free parameters of a nonsingular black hole in conformal gravity by employing megamaser astrophysical data of t…
AdS black holes in two-dimensional dilaton gravity and holography
Uriel Noriega-Cornelio, Alfredo Herrera-Aguilar, Cupatitzio RamÃrez-Romero
In this paper, we present two novel analytic AdS black hole solutions in a two-dimensional dilaton gravity theory with two scalar fields non-minimally coupled to gravity. Our solut…