212 citations · 2.2k across the 76 of their papers we have counts for
8 papers · 1 filter
Hawking radiation and propagation of massive charged scalar field on a three-dimensional Gödel black hole
P. A. González, Ali Övgün, Joel Saavedra +1
In this paper we consider the three-dimensional Gödel black hole as a background and we study the vector particle tunneling from this background in order to obtain the Hawking temp…
Quasinormal Modes of a Schwarzschild Black Hole Immersed in an Electromagnetic Universe
Ali Övgün, Izzet Sakalli, Joel Saavedra
We study the quasinormal modes (QNMs) of the Schwarzschild black hole immersed in an electromagnetic (em) universe. The immersed Schwarzschild black hole (ISBH) is originated from…
On the phantom barrier crossing and the bounds on the speed of sound in non-minimal derivative coupling theories
Israel Quiros, Tame Gonzalez, Ulises Nucamendi +3
In this paper we investigate the so called "phantom barrier crossing" issue in a cosmological model based in the scalar-tensor theory with non-minimal derivative coupling to the Ei…
The Effect of the Gauss-Bonnet term to Hawking Radiation from arbitrary dimensional Black Brane
Xiao-Mei Kuang, Joel Saavedra, Ali Övgün
We investigate the probabilities of the tunneling and the radiation spectrums of the massive spin-1 particles from arbitrary dimensional Gauss-Bonnet-Axions (GBA) Anti-de Sitter (A…
Dynamics of viscous cosmologies in the full Israel-Stewart formalism
Samuel Lepe, Giovanni Otalora, Joel Saavedra
It is performed a detailed dynamical analysis for a bulk viscosity model in the full Israel-Stewart formalism for a spatially flat Friedmann-Robertson-Walker Universe. In our study…
Superradiant Instability of Near Extremal and Extremal Four-Dimensional Charged Hairy Black Hole in anti-de Sitter Spacetime
P. A. González, Eleftherios Papantonopoulos, Joel Saavedra +1
We study the instability of near extremal and extremal four-dimensional AdS charged hairy black hole to radial neutral massive and charged massless scalar field perturbations. We s…