I investigate the influence of a non-zero cosmological constant on the evolution of anisotropy in overdensities that grow by gravitational collapse. The claim that a positive value of LAMBDA might produce stronger asphericities is considered by following the collapse of homogeneous spheroids imbedded in Friedman-Lemaitre backgrounds. It is shown that, although the calculations indeed show this effect, it is small for the values of LAMBDA allowed by the classical cosmological tests. When we do not limit ourselves by constraints arising from the choice of an initial fluctuation spectrum, structures in an open universe (OMEGA0) = 0.1, lamda0 = 0), including the peculiar velocity structure, can be reproduced in a flat Lemaitre universe (OMEGA0 ...
Observations of the expansion rate of the universe at late times disagree by a factor of 1.5-2 with ...
Models of the very early universe, including inflationary models, are argued to produce varying univ...
Structure occurs over a vast range of scales in the Universe. Our large-scale cosmological models ar...
I investigate the influence of a non-zero cosmological constant on the evolution of anisotropy in ov...
I investigate the influence of a non-zero cosmological constant on the evolution of anisotropy in ov...
The observational evidence for the existence of a non-zero cosmologicalconstant is getting stronger....
Using the BSBM varying-alpha theory, and the spherical collapse model for cosmological structure for...
17 pages, 7 figuresInternational audienceThe dynamical effect of the cosmological constant $\Lambda$...
AbstractWe study the space–time evolution of the fine structure constant, α, inside evolving spheric...
Includes abstract.Includes bibliographical references.The next generation of telescopes will usher i...
23 pagesInternational audienceWe study structure formation in K-mouflage cosmology whose main featur...
We present results on the non-linear dynamics of a wide class of inhomogeneous cosmological models w...
In this paper, we investigate anisotropic fluid cosmology in a situation where the space-time metric...
When taking the real, inhomogeneous and anisotropic matter distribution in the semi-local universe i...
We discuss the Buchert equations, which describe the average expansion of an inhomogeneous dust univ...
Observations of the expansion rate of the universe at late times disagree by a factor of 1.5-2 with ...
Models of the very early universe, including inflationary models, are argued to produce varying univ...
Structure occurs over a vast range of scales in the Universe. Our large-scale cosmological models ar...
I investigate the influence of a non-zero cosmological constant on the evolution of anisotropy in ov...
I investigate the influence of a non-zero cosmological constant on the evolution of anisotropy in ov...
The observational evidence for the existence of a non-zero cosmologicalconstant is getting stronger....
Using the BSBM varying-alpha theory, and the spherical collapse model for cosmological structure for...
17 pages, 7 figuresInternational audienceThe dynamical effect of the cosmological constant $\Lambda$...
AbstractWe study the space–time evolution of the fine structure constant, α, inside evolving spheric...
Includes abstract.Includes bibliographical references.The next generation of telescopes will usher i...
23 pagesInternational audienceWe study structure formation in K-mouflage cosmology whose main featur...
We present results on the non-linear dynamics of a wide class of inhomogeneous cosmological models w...
In this paper, we investigate anisotropic fluid cosmology in a situation where the space-time metric...
When taking the real, inhomogeneous and anisotropic matter distribution in the semi-local universe i...
We discuss the Buchert equations, which describe the average expansion of an inhomogeneous dust univ...
Observations of the expansion rate of the universe at late times disagree by a factor of 1.5-2 with ...
Models of the very early universe, including inflationary models, are argued to produce varying univ...
Structure occurs over a vast range of scales in the Universe. Our large-scale cosmological models ar...