Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Yerko Vásquez"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-19 (2024)
Abstract We consider scalar field perturbations in the background of black holes immersed in perfect fluid dark matter (PFDM). We find, by using the sixth-order Wentzel–Kramers–Brillouin (WKB) approximation, that the longest-lived modes are those
Externí odkaz:
https://doaj.org/article/d338a8918ebd44feaa47c07cd944436a
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-20 (2023)
Abstract In this work we consider the propagation of massive scalar fields in the background of Weyl black holes, and we study the effect of the scalar field mass in the spectrum of the quasinormal frequencies (QNFs) via the Wentzel–Kramers–Brill
Externí odkaz:
https://doaj.org/article/0f204168ba204aa18ee5095d95d1a040
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 9, Pp 1-13 (2023)
Abstract The time like structure of the five-dimensional Schwarzschild and Reissner–Nordström anti-de Sitter black holes is studied in detail. Different kinds of motion are allowed and studied by using an adequate effective potential. Then, by sol
Externí odkaz:
https://doaj.org/article/9fabd2e3de45489ebb334104aa01207a
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 1, Pp 1-12 (2023)
Abstract We consider the propagation of a charged massive scalar field in the background of a four-dimensional Ernst black hole and study its stability analyzing the quasinormal modes (QNMs), which are calculated using the semi-analytical Wentzel–K
Externí odkaz:
https://doaj.org/article/d0275a8f1e7e4b84be67d27180ecbe9f
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 7, Pp 1-8 (2022)
Abstract We study neutral massless scalar field perturbations around an extreme dilaton black hole in 2 + 1 dimensions: the wave equations of the massless scalar field is shown to be exactly solvable in terms of Whittaker functions. Thus, the quasino
Externí odkaz:
https://doaj.org/article/1c1108d01a9a4b2cbe8f47860b815b04
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 6, Pp 1-35 (2022)
Abstract 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 uncharged scalar and fermionic pertur
Externí odkaz:
https://doaj.org/article/555b60eff643414f96ac6a4c1fa6c6c6
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 5, Pp 1-16 (2021)
Abstract We study the propagation of scalar fields in the background of an asymptotically de Sitter black hole solution in f(R) gravity. The aim of this work is to analyze in modified theories of gravity the existence of an anomalous decay rate of th
Externí odkaz:
https://doaj.org/article/3cba571f10de41cc95ab68c7cbaeaed2
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-11 (2021)
Abstract The study of the motion of photons around massive bodies is one of the most useful tools to find the geodesic structure associated with said gravitational source. In the present work, different possible paths projected in an invariant hyperp
Externí odkaz:
https://doaj.org/article/29350283c5aa4befa13c38aa457962aa
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-11 (2021)
Abstract We consider a three-dimensional rotating AdS black hole, which is a solution of Hořava gravity in the low-energy limit that corresponds to a Lorentz-violating version of the BTZ black hole, and we analyze the effect of the breaking of Loren
Externí odkaz:
https://doaj.org/article/436458830fb64019953f9285b6518da7
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 10, Pp 1-12 (2020)
Abstract We study the motion of particles in the background of a scalar–tensor theory of gravity in which the scalar field is kinetically coupled to the Einstein tensor. We constrain the value of the derivative parameter z through solar system test
Externí odkaz:
https://doaj.org/article/11174a3fdad74a20a673973b1f083e1f