The spherical collapse model in a universe with cosmological constant

Abstract

We generalize the spherical collapse model for the formation of dark matter halos 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.

6 pages, 3 figures, contribution to the proceedings of the 3rd International Workshop on the Identification of Dark Matter (IDM2000) in York, in press

Cited by in corpus (18)

• Dark matter in elliptical galaxies: II. Estimating the mass within the virial radius
• Dark matter distribution in the Coma cluster from galaxy kinematics: breaking the mass-anisotropy degeneracy
• On the spherical collapse model in dark energy cosmologies
• The structure of voids
• Dark matter in elliptical galaxies: I. Is the total mass density profile of the NFW form or even steeper?
• Future Evolution of Structure in an Accelerating Universe
• The distribution function of dark matter in massive haloes
• The formation and gas content of high redshift galaxies and minihalos
• Probing dark energy with baryonic oscillations and future radio surveys of neutral Hydrogen
• Mass profiles and galaxy orbits in nearby galaxy clusters from the analysis of the projected phase-space
• The grouping, merging and survival of subhaloes in the simulated Local Group
• Radial velocity moments of dark matter haloes
• The mass and anisotropy profiles of galaxy clusters from the projected phase space density: testing the method on simulated data
• Weak-Lensing Halo Numbers and Dark-Matter Profiles
• Sloan Great Wall as a complex of superclusters with collapsing cores
• Stacking Clusters in the ROSAT All-Sky Survey
• On the newtonian limit and cut--off scales of isothermal dark matter halos with cosmological constant
• The Radial Distribution of Mono-Metallicity Populations in the Galactic Disk as Evidence for Two-Phase Disk Formation