Zobrazeno 1 - 10
of 152
pro vyhledávání: '"Luz, Paulo"'
Autor:
Luz, Paulo, Carloni, Sante
We study adiabatic, radial perturbations of static, self-gravitating perfect fluids within the theory of general relativity employing a new perturbative formalism. We show that by considering a radially static observer, the description of the perturb
Externí odkaz:
http://arxiv.org/abs/2405.10359
Autor:
Luz, Paulo, Carloni, Sante
We present a new system of equations that fully characterizes adiabatic, radial perturbations of perfect fluid stars within the theory of general relativity. The properties of the system are discussed, and, provided that the equilibrium spacetime ver
Externí odkaz:
http://arxiv.org/abs/2405.06740
Autor:
Luz, Paulo, Carloni, Sante
We present a framework to describe completely general first-order perturbations of static, spatially compact, and locally rotationally symmetric class II spacetimes within the theory of general relativity. The perturbation variables are by constructi
Externí odkaz:
http://arxiv.org/abs/2405.05321
Autor:
Luz, Paulo, Lemos, José P. S.
Publikováno v:
Physical Review D 107, 084004 (2023)
We start by presenting the general set of structure equations for the 1+3 threading spacetime decomposition in 4 spacetime dimensions, valid for any theory of gravitation based on a metric compatible affine connection. We then apply these equations t
Externí odkaz:
http://arxiv.org/abs/2303.03104
Autor:
Lemos, José P. S., Luz, Paulo
Publikováno v:
Physical Review D 105, 044058 (2022)
Bubble universes and traversable wormholes in general relativity can be realized as two sides of the same concept. To exemplify, we find, display, and study in a unified manner a Minkowski-Minkowski closed universe and a Minkowski-Minkowski traversab
Externí odkaz:
http://arxiv.org/abs/2201.02203
Autor:
Fortuna, Ana, Luz, Paulo, Cordeiro, Magda, Gosalbez, Beatriz, Campoa, Elsa Reis, Claudino, Melanie, Alves, Pedro, Costa, João G., Fernandes, Ana S., Pinto, Cidália
Publikováno v:
In Heliyon 15 July 2024 10(13)
Autor:
Lemos, José P. S., Luz, Paulo
Publikováno v:
Phys. Rev. D 103, 104046 (2021)
We classify all fundamental electrically charged thin shells in general relativity, i.e., static spherically symmetric perfect fluid thin shells with a Minkowski spacetime interior and a Reissner-Nordstr\"om spacetime exterior, characterized by the s
Externí odkaz:
http://arxiv.org/abs/2103.15832
Autor:
Luz, Paulo Júnior Melo da
Publikováno v:
Repositório Institucional da UNISINOSUniversidade do Vale do Rio dos SinosUNISINOS.
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Made available in DSpace on 2018-07-12T15:35:03Z (GM
Made available in DSpace on 2018-07-12T15:35:03Z (GM
Externí odkaz:
http://www.repositorio.jesuita.org.br/handle/UNISINOS/7108
Autor:
Luz, Paulo, Mena, Filipe C.
We extend the scope of the Raychaudhuri-Komar singularity theorem of General Relativity to affine theories of gravity with and without torsion. We first generalize the existing focusing theorems using time-like and null congruences of curves which ar
Externí odkaz:
http://arxiv.org/abs/1909.00018
Autor:
Luz, Paulo, Carloni, Sante
Publikováno v:
Phys. Rev. D 100, 084037 (2019)
We generalize the Tolman-Oppenheimer-Volkoff equations for space-times endowed with a Weyssenhoff like torsion field in the Einstein-Cartan theory. The new set of structure equations clearly show how the presence of torsion affects the geometry of th
Externí odkaz:
http://arxiv.org/abs/1907.11489