Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Triay, Roland"'
Publikováno v:
JCAP 08 (2011) 026
We investigate the dynamics of a single spherical void embedded in a Friedmann-Lema\^itre universe, and analyze the void shape in the redshift space. We find that the void in the redshift space appears as an ellipse shape elongated in the direction o
Externí odkaz:
http://arxiv.org/abs/1103.2007
Autor:
Triay, Roland
Publikováno v:
AIP Conf.Proc.1246:105-113,2010
Is Dark Energy justified as an alternative to the cosmological constant $\Lambda$ in order to explain the acceleration of the cosmic expansion ? It turns out that a straightforward dimensional analysis of Einstein equation provides us with clear evid
Externí odkaz:
http://arxiv.org/abs/1004.0091
Autor:
Triay, Roland, Fliche, Henri-Hugues
Publikováno v:
Prog.Theor.Phys.Suppl.172:40-43,2008
With the motivation in mind to evaluate the contribution of the cosmological constant $\Lambda$ on the foam like patterns formation process in the distribution of galaxies, we investigate the Newtonian dynamics of a spherical void embedded in an unif
Externí odkaz:
http://arxiv.org/abs/0801.2883
Autor:
Triay, Roland, Fliche, Henri-Hugues
Publikováno v:
XII Brazilian School of Cosmology and Gravitation, Br\'{e}sil (11/09/2006)
This lecture provides us with Newtonian approaches for the interpretation of two puzzling cosmological observations that are still discussed subject : a bulk flow and a foam like structure in the distribution of galaxies. For the first one, we model
Externí odkaz:
http://arxiv.org/abs/gr-qc/0701107
Autor:
Triay, Roland, Fliche, Henri-Hugues
Publikováno v:
Proceedings of the Eleventh Marcel Grossmann Meeting on General Relativity, Allemagne (2007)
We show that the cosmological constant favours significantly the growth of voids in the universe. This dynamical effect is investigated within a newtonian approach with an extension to Friedmann-Lema\^{\i}tre model.
Comment: to appear
Comment: to appear
Externí odkaz:
http://arxiv.org/abs/gr-qc/0608078
Autor:
Fliche, Henri-Hugues, Triay, Roland
Publikováno v:
JCAP 1011:022,2010
The dynamical effect of the cosmological constant $\Lambda$ on a single spherical void evolving in a the universe is investigated within a non linear perturbation of Newton-Friedmann models. The void expands with a huge initial burst which freezes as
Externí odkaz:
http://arxiv.org/abs/gr-qc/0607090
Autor:
Triay, Roland
Publikováno v:
Int.J.Mod.Phys.D14:1667-1674,2005
According to general relativity, the present analysis shows on geometrical grounds that the cosmological constant problem is an artifact due to the unfounded link of this fundamental constant to vacuum energy density of quantum fluctuations.
Com
Com
Externí odkaz:
http://arxiv.org/abs/gr-qc/0510088
Publikováno v:
Gen.Rel.Grav. 38 (2006) 463-474
We investigate the dynamics of an homogenous distribution of galaxies moving under the cosmological expansion through Euler-Poisson equations system. The solutions are interpreted with the aim of understanding the cosmic velocity fields in the Local
Externí odkaz:
http://arxiv.org/abs/gr-qc/0505095
Publikováno v:
Class.Quant.Grav.14:2203-2218,1997
Multidimensional cosmological model describing the evolution of a fluid with shear and bulk viscosity in $n$ Ricci-flat spaces is investigated. The barotropic equation of state for the density and the pressure in each space is assumed. The second equ
Externí odkaz:
http://arxiv.org/abs/gr-qc/0005057
Autor:
Triay, Roland
Publikováno v:
Journal (American Water Works Association), 1956 Jun 01. 48(6), 629-653.
Externí odkaz:
https://www.jstor.org/stable/41254561
