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Title: Cosmology with massive neutrinos II: on the universality of the halo mass function and bias

We use a large suite of N-body simulations to study departures from universality in halo abundances and clustering in cosmologies with non-vanishing neutrino masses. To this end, we study how the halo mass function and halo bias factors depend on the scaling variable σ{sup 2}(M,z), the variance of the initial matter fluctuation field, rather than on halo mass M and redshift z themselves. We show that using the variance of the cold dark matter rather than the total mass field, i.e., σ{sup 2}{sub cdm}(M,z) rather than σ{sup 2}{sub m}(M,z), yields more universal results. Analysis of halo bias yields similar conclusions: when large-scale halo bias is defined with respect to the cold dark matter power spectrum, the result is both more universal, and less scale- or k-dependent. These results are used extensively in Papers I and III of this series.
Authors:
 [1] ;  [2] ;  [3] ; ;  [4]
  1. SISSA- International School for Advanced Studies, Via Bonomea 265, Trieste, I-34136 (Italy)
  2. INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, Merate, I-23807 (Italy)
  3. The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, Trieste, I-34151 (Italy)
  4. INAF - Osservatorio Astronomico di Trieste, via Tiepolo 11, Trieste, I-34143 (Italy)
Publication Date:
OSTI Identifier:
22370677
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGY; FLUCTUATIONS; FUNCTIONS; MASS; NEUTRINOS; NONLUMINOUS MATTER; RED SHIFT; SIMULATION; SPECTRA; YIELDS