Nonlinear evolution of spherical perturbation in a non-flat Universe with cosmological constant

Details Nonlinear evolution of spherical perturbation in a non-flat Universe with cosmological constant Nonlinear evolution of spherical perturbation in a non-flat Universe with cosmological constant

2001-08-17

arxiv.org/abs/astro-ph/0108283v2

Astronomy and Astrophysics

Astrophysics

7 pages, 5 figures, results for quintessence removed (as obtained with an unjustified assumption of the conservation of energy

Scientific paper

We generalize the spherical collapse model for the formation of bound objects
to apply in a Universe with arbitrary positive cosmological constant. We
calculate the critical condition for collapse of an overdense region and give
exact values of the characteristic densities and redshifts of its evolution.

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