Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Fontana, R. D. B."'
Autor:
Fontana, R. D. B., Rincon, Angel
We investigate the propagation of a scalar field in a $(2+1)$-dimensional accelerated black hole, recently revisited in \cite{Arenas_Henriquez_2022}. We briefly describe the minimally-coupled configuration as rendering a trivial scalar perturbation w
Externí odkaz:
http://arxiv.org/abs/2404.09936
Publikováno v:
Phys.Rev.D 109 (2024) 2, 024027
We investigate quasitopological black holes in $(2+1)$ dimensions in the context of electromagnetic-generalized-quasitopological-gravities (EM-GQT). For three different families of geometries of quasitopological nature, we study the causal structure
Externí odkaz:
http://arxiv.org/abs/2401.10025
Autor:
Fontana, R. D. B
We investigate the charged scalar field propagating in a (2+1) charged BTZ black hole. The conditions for stability are studied unveiling, for each black hole geometry, the existence of a critical scalar charge as of the evolution is unstable. The ex
Externí odkaz:
http://arxiv.org/abs/2306.02504
Publikováno v:
Phys, Rev. D 106, 124007 (2022)
We investigate some aspects of the $(2+1)$-dimensional Gauss-Bonnet black hole proposed in [1][2]. The perturbations of scalar and massless spinorial fields are studied suggesting the dynamical stability of the geometry. The field evolution is analyz
Externí odkaz:
http://arxiv.org/abs/2206.06516
Publikováno v:
Physical Review D 104 104039 (2021)
In this paper we analyze the propagation of a charged scalar field in a Reissner-Nordstr\"om black hole endowed with one anisotropic fluid that can play the role of a cosmological term for certain set of parameters. The evolution of a scalar wave sca
Externí odkaz:
http://arxiv.org/abs/2108.04864
Publikováno v:
Phys. Rev. D 103, 064005 (2021)
The anomalous decay rate of the quasinormal modes occurs when the longest-lived modes are the ones with higher angular number. Such behaviour has been recently studied in different static spacetimes, for scalar and fermionic perturbations, being obse
Externí odkaz:
http://arxiv.org/abs/2011.10620
Publikováno v:
Physics Letters B 811C (2020) 135966
We consider the equivalence of quasinormal modes and geodesic quantities recently brought back due to the black hole shadow observation by Event Horizon Telescope. Using WKB method we found an analytical relation between the real part of quasinormal
Externí odkaz:
http://arxiv.org/abs/2005.09761
Publikováno v:
The European Physical Journal C volume 80, Article number: 848 (2020)
In this work we consider black holes surrounded by anisotropic fluids in four dimensions. We first study the causal structure of these solutions showing some similarities and differences with Reissner-Nordstr\"om-de Sitter black holes. In addition, w
Externí odkaz:
http://arxiv.org/abs/2003.00564
Autor:
Abdalla, E., Cuadros-Melgar, B., Fontana, R. D. B., de Oliveira, Jeferson, Papantonopoulos, Eleftherios, Pavan, A. B.
Publikováno v:
Phys. Rev. D 99, 104065 (2019)
We study the instability of a Reissner-Nordstr\"om-AdS (RNAdS) black hole under perturbations of a massive scalar field coupled to Einstein tensor. Calculating the potential of the scalar perturbations we find that as the strength of the coupling of
Externí odkaz:
http://arxiv.org/abs/1903.10850
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