Zobrazeno 1 - 10
of 3 288
pro vyhledávání: '"Rodrigues, A. E."'
Autor:
Rodrigues, Naruna E., Alcarás, José Renato, Bruno, Odemir M., Nakamura, Gilberto, Martinez, Alexandre S.
In fields such as acoustics, electromagnetism, and quantum physics, the scattering of waves by localized objects is a fundamental phenomenon. Building on this, the present study investigates the energy distribution within a spherical scattering cente
Externí odkaz:
http://arxiv.org/abs/2410.00666
Autor:
Panah, B. Eslam, Rodrigues, Manuel E.
Motivated by the impact of the phantom field (or anti-Maxwell field) on the structure of three-dimensional black holes in the presence of the cosmological constant, we present the first extraction of solutions for the phantom BTZ (A)dS black hole. In
Externí odkaz:
http://arxiv.org/abs/2409.12214
In the framework of Simpson-Visser, the search for field sources that produce black bounces in alternative gravity theories has remained unresolved. In this paper, the first in a series exploring sources for alternative theories of gravity, we identi
Externí odkaz:
http://arxiv.org/abs/2409.12101
Autor:
Pereira, Carlos F. S., Rodrigues, Denis C., Silva, Marcos V. de S., Fabris, Júlio C., Rodrigues, Manuel E., Belich, H.
In the present work, we obtain and analyze a new class of analytical solutions of magnetically charged black bounces in k-essence theory, spherically symmetric in (3+1)-dimensions, coupled to nonlinear electrodynamics (NED). We consider two metric mo
Externí odkaz:
http://arxiv.org/abs/2409.09182
Autor:
Rodrigues, Tulio E., Furlan, Eduardo, Helene, André F., Helene, Otaviano, Pessini, Eduardo, Simões, Alexandre, Pontes, Maurício, Fischer, Frida M.
The relationships between workload and fatigue or sleepiness are investigated through the analysis of rosters and responses to questionnaires from Brazilian aircrews, taken from Fadig\^ometro database. The approach includes temporal markers - coincid
Externí odkaz:
http://arxiv.org/abs/2408.08889
Autor:
Junior, Ednaldo L. B., Junior, José Tarciso S. S., Lobo, Francisco S. N., Rodrigues, Manuel E., Rubiera-Garcia, Diego, da Silva, Luís F. Dias, Vieira, Henrique A.
We consider a recently introduced extension of General Relativity dubbed as Cotton gravity (CG), based on the use of the Cotton tensor, to estimate the size of a new constant $\gamma$ appearing within a spherically symmetric, vacuum solution of the t
Externí odkaz:
http://arxiv.org/abs/2407.21655
Autor:
Junior, Ednaldo L. B., Junior, José Tarciso S. S., Lobo, Francisco S. N., Rodrigues, Manuel E., Rubiera-Garcia, Diego, da Silva, Luís F. Dias, Vieira, Henrique A.
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 the conver
Externí odkaz:
http://arxiv.org/abs/2407.21649
This study delves deeply into braneworld scenarios within modified gravity models, investigating their impact on particle localization and the structure of branes. Through a comprehensive blend of numerical analyses and theoretical inquiries, we unra
Externí odkaz:
http://arxiv.org/abs/2405.10169
Publikováno v:
Eur. Phys. J. C 84, 557 (2024)
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 essentially to fulfi
Externí odkaz:
http://arxiv.org/abs/2405.09702
Autor:
Pereira, Carlos F. S., Martins, Ébano L., Rodrigues, Denis C., Fabris, Júlio C., Rodrigues, Manuel E.
In the present study, we generalize the possible ghost field configurations within the framework of $k$-essence theory to the Simpson-Visser metric area function $\Sigma^2=x^2+a^2$. Our analysis encompasses field configurations for the region-defined
Externí odkaz:
http://arxiv.org/abs/2405.07455