Halo abundances and shear in void models

Abstract

We study the non-linear gravitational collapse of dark matter into halos through numerical N-body simulations of Lemaitre-Tolman-Bondi void models. We extend the halo mass function formalism to these models in a consistent way. This extension not only compares well with the simulated data at all times and radii, but it also gives interesting clues about the impact of the background shear on the growth of perturbations. Our results give hints about the possibility of constraining the background shear via cluster number counts, which could then give rise to strong constraints on general inhomogeneous models, of any scale.

5 pages, 3 figures, Accepted in Physics of the Dark Universe, preprint IFT-UAM/CSIC-12-31

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Cited by in corpus (9)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Measurement of the thermal Sunyaev-Zel'dovich effect around cosmic voids
• A novel null test for the $\Lambda$CDM model with growth-rate data
• Reconstruction of the null-test for the matter density perturbations
• Conserved Quantities in Lemaitre-Tolman-Bondi Cosmology
• Two-point correlation function of density perturbations in a large void universe
• The Effect of Primordial Anti-Biasing on the Local Measurement of the Key Cosmological Parameters
• Newtonian self-gravitating system in a relativistic huge void universe model