Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Manuel E. Rodrigues"'
Autor:
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo, Manuel E. Rodrigues, Diego Rubiera-Garcia, Luís F. Dias da Silva, Henrique A. Vieira
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 11, Pp 1-16 (2024)
Abstract Recently, J. Harada proposed a theory relating gravity to the Cotton tensor, dubbed as “Cotton gravity” (CG). This is an extension of General Relativity such that every solution of the latter turns out to be a solution of the former (but
Externí odkaz:
https://doaj.org/article/3e1d9a6efc0947c18365a90455644a39
Autor:
G. Alencar, Kirill A. Bronnikov, Manuel E. Rodrigues, Diego Sáez-Chillón Gómez, Marcos V. de S. Silva
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 7, Pp 1-11 (2024)
Abstract One of the main issues in gravitation is the presence of singularities in the most common space-time solutions of General Relativity, as the case of black holes. A way of constructing regular solutions that remove spacelike singularities con
Externí odkaz:
https://doaj.org/article/9f46e387328f40c29898c7f3047743df
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 6, Pp 1-14 (2024)
Abstract In this work, we analyse black bounce solutions in the recently proposed “Conformal Killing gravity” (CKG), by coupling the theory to nonlinear electrodynamics (NLED) and scalar fields. The original motivation of the theory was essential
Externí odkaz:
https://doaj.org/article/dbb942512897412fbcef2cabf75d218c
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-18 (2024)
Abstract In this work, we consider an extension of the symmetric teleparallel equivalent of General Relativity (STEGR), namely, $$f({\mathbb {Q}})$$ f ( Q ) gravity, by including a boundary term $${\mathbb {B}}_Q$$ B Q , where $${\mathbb {Q}}$$ Q is
Externí odkaz:
https://doaj.org/article/f1e1fd2f1be048c28f260b83c750173f
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-8 (2023)
Abstract In this article, the implementation of black-bounce solutions in f(R) theories is investigated. Black-bounce solutions are regular configurations of the static spherically symmetric space-time, containing both black holes and wormholes struc
Externí odkaz:
https://doaj.org/article/4750cc06191a460390a5af7ee43c195a
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-23 (2023)
Abstract In this paper, we will use the coincident gauge to investigate new solutions of the $$f(\mathbb {Q})$$ f ( Q ) theory applied in the context of black holes, regular black holes, and the black-bounce spacetime. For each of these approaches, w
Externí odkaz:
https://doaj.org/article/8b23b59df59f47ba809fc6bdd1913714
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 5, Pp 1-17 (2023)
Abstract In this paper we propose to use the Shapiro time delay as a tool to distinguish between different black hole solutions. We calculate the analytic Shapiro time using first order expansions for four solutions. These are Schwarzschild, Reissner
Externí odkaz:
https://doaj.org/article/79b1d8c6a01a4b6480b6bd90b85cd885
Publikováno v:
Revista Brasileira de Ensino de Física, Vol 43 (2021)
Este artigo buscou trazer uma analise das regiões de confinamento descritas por uma partícula carregada submetida ao campo magnético de um dipolo. Foram obtidas e analisadas as equações de movimento, de onde foi possível demonstrar que a energi
Externí odkaz:
https://doaj.org/article/6059ca0ce597475190b7cdc62551d928
Publikováno v:
Revista Brasileira de Ensino de Física, Vol 43 (2021)
Desde que James Clerck Maxwell publicou seu brilhante trabalho unificando a eletricidade e magnetismo surgiram, a partir de então, inúmeras aplicações práticas do mesmo. Este artigo discute o potencial elétrico bidimensional e tridimensional, o
Externí odkaz:
https://doaj.org/article/d37b426299384d13af69b0be11e351ca
Publikováno v:
Revista Brasileira de Ensino de Física, Vol 43 (2021)
Neste artigo utilizou–se um campo magnético da forma ℬ → = ℬ 1 [ cos ( ω t ) i ^ + sin ( ω t ) j ^ ] + ℬ 0 k ^ como ordem zero de uma expansão, advinda de um campo magnético parabólico, para descrever o movimento confinado de uma part
Externí odkaz:
https://doaj.org/article/058e2579e02b4fdda35a168c56b935c6