89 citations · 471 across the 31 of their papers we have counts for
31 papers
Exotic Spinor Deformation of a Schwarzschild Black Hole: Perturbations and Stability
Luís Rodolfo dos Santos Filho, Bertha Cuadros-Melgar
In this work we investigate how exotic spinorial topology modifies the propagation of fermionic modes in the Schwarzschild geometry. By incorporating a topological gradient, $\part…
21-cm Brightness Temperature in a Unified-Dark-Sector Horndeski Theory
Bertha Cuadros-Melgar, Thanasis Karakasis, Eleftherios Papantonopoulos +1
We investigate the impact of scalar-tensor theories on the 21cm brightness temperature. We consider a specific model in Horndeski scalar-tensor theory in which dark matter and dark…
Stability of the spacetime of a magnetized compact object
Eveling C. Ribeiro, L. Formigari, Marcos R. Ribeiro +5
We investigate the stability of scalar perturbations around a magnetized stationary compact object in General Relativity. The considered object is one of the simplest exact solutio…
Gauss-Bonnet black holes in (2+1) dimensions: Perturbative aspects and entropy features
B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira
We investigate some aspects of the -dimensional Gauss-Bonnet black hole proposed in [1][2]. The perturbations of scalar and massless spinorial fields are studied suggesting…
Superradiance and instabilities in black holes surrounded by anisotropic fluids
B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira
In this paper we analyze the propagation of a charged scalar field in a Reissner-Nordström black hole endowed with one anisotropic fluid that can play the role of a cosmological te…
NRPyCritCol & SFcollapse1D: an open-source, user-friendly toolkit to study critical phenomena
Leonardo R. Werneck, Zachariah B. Etienne, Elcio Abdalla +2
We present a new open-source, user-friendly toolkit of two codesSFcollapse1D and NRPyCritColto study critical phenomena in the context of gravitational collapse. SFcollapse1D…