On the abundance of collapsed objects

Martin Kerscher, Thomas Buchert, Toshifumi Futamase

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The redshift dependence of the abundance of collapsed objects places strong constraints on cosmological models of structure formation. We apply a recently proposed model describing the anisotropic collapse of inhomogeneous spatial domains. Compared with the spherical top-hat model, this generic model leads to significantly more collapsed objects at high redshifts: at redshift 1 and on the scale of rich clusters a factor of 65. Furthermore, for a fixed normalization of the initial fluctuation spectrum (σ8 = 1), we predict 4 times as much presently collapsed objects on the mass scale of rich clusters within the standard cold dark matter cosmogony compared to the spherical collapse.

Original languageEnglish
Pages (from-to)L79-L82
JournalAstrophysical Journal
Volume558
Issue number2 PART 2
DOIs
Publication statusPublished - 2001 Sep 10

Keywords

  • Cosmology: theory
  • Galaxies: abundances
  • Galaxies: clusters: general
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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