Zobrazeno 1 - 10
of 62
pro vyhledávání: '"J. C. Fabris"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 4, Pp 1-14 (2023)
Abstract In this work, we study the influence of f(R, T) gravity on rapidly rotating neutron stars. First we discuss the main aspects of this modified theory of gravity where the gravitational Lagrangian is an arbitrary function of the Ricci scalar R
Externí odkaz:
https://doaj.org/article/34ad2484533248c8ac9f923039613e54
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 4, Pp 1-12 (2021)
Abstract In this work, we consider effects of the dynamical vacuum in quantum cosmology in presence of a minimum length introduced by the GUP (generalized uncertainty principle) related to the modified commutation relation $$[{\hat{X}},{\hat{P}}] :=
Externí odkaz:
https://doaj.org/article/38725bbf30f6416685eddf54465d59e9
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 5, Pp 1-6 (2019)
Abstract In a recent paper we have shown that a minimally coupled, self-interacting scalar field of mass m can form black holes of mass $$M=\sqrt{3}/(4m)$$ M=3/(4m) (in Planck units). If dark matter is composed by axions, they can form miniclusters t
Externí odkaz:
https://doaj.org/article/c87ca941dc6b4330a05f228e595809e2
Autor:
S. Carneiro, J. C. Fabris
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 8, Pp 1-4 (2018)
Abstract With a suitable decomposition of its energy-momentum tensor into pressureless matter and a vacuum type term, we investigate the spherical gravitational collapse of a minimally coupled, self-interacting scalar field, showing that it collapses
Externí odkaz:
https://doaj.org/article/1015922eafa645a0b542fe549df7f770
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 5, Pp 1-6 (2018)
Abstract We investigate the braneworld gravity starting from the non-conservative gravitational field equations in a five-dimensional bulk. The approach is based on the Gauss–Codazzi formalism along with the study of the braneworld consistency cond
Externí odkaz:
https://doaj.org/article/7db2775108e34b27bceb363a9af17fb9
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 5, Pp 1-13 (2018)
Abstract Reduced relativistic gas (RRG) is a useful approach to describe the warm dark matter (WDM) or the warmness of baryonic matter in the approximation when the interaction between the particles is irrelevant. The use of Maxwell distribution lead
Externí odkaz:
https://doaj.org/article/5b99e4128fc14883aeeeeb27603ebd7f
Dirac $$\delta $$ δ -function potential in quasiposition representation of a minimal-length scenario
Autor:
M. F. Gusson, A. Oakes O. Gonçalves, R. O. Francisco, R. G. Furtado, J. C. Fabris, J. A. Nogueira
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 3, Pp 1-7 (2018)
Abstract A minimal-length scenario can be considered as an effective description of quantum gravity effects. In quantum mechanics the introduction of a minimal length can be accomplished through a generalization of Heisenberg’s uncertainty principl
Externí odkaz:
https://doaj.org/article/35333d8c327b4717ad811004cf42f88a
Publikováno v:
Physical Review D. 96
It is analyzed the effects of both bulk and shear viscosities on the perturbations, relevant for structure formation in late time cosmology. It is shown that shear viscosity can be as effective as the bulk viscosity on suppressing the growth of pertu
Publikováno v:
European Physical Journal C
European Physical Journal C: Particles and Fields, Vol 77, Iss 7, Pp 1-10 (2017)
European Physical Journal C: Particles and Fields, Vol 77, Iss 7, Pp 1-10 (2017)
Both scalar fields and (generalized) Chaplygin gases have been widely used separately to characterize the dark sector of the Universe. Here we investigate the cosmological background dynamics for a mixture of both these components and quantify the fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1229d784ebfbd7309ea32572ffc291b1
http://arxiv.org/abs/1703.04149
http://arxiv.org/abs/1703.04149
Publikováno v:
Astrophysics and Space Science Proceedings ISBN: 9783319447681
The Cosmic Microwave Background
The Cosmic Microwave Background
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e86134b3ab410a25b49d7b40def60cf
https://doi.org/10.1007/978-3-319-44769-8
https://doi.org/10.1007/978-3-319-44769-8