Halo abundances and shear in void models

David Alonso, Juan García-Bellido, Troels Haugbølle, Alexander Knebe

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    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.
    Translated title of the contributionHalo abundances and shear in void models
    Original languageEnglish
    JournalPhysics of the Dark Universe
    Volume1
    Issue number1-2
    Pages (from-to)24-31
    Number of pages8
    ISSN2212-6864
    DOIs
    Publication statusPublished - Nov 2012

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