Cosmology with massive neutrinos II: on the universality of the halo mass function and bias
- SISSA- International School for Advanced Studies, Via Bonomea 265, Trieste, I-34136 (Italy)
- INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, Merate, I-23807 (Italy)
- The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, Trieste, I-34151 (Italy)
- INAF - Osservatorio Astronomico di Trieste, via Tiepolo 11, Trieste, I-34143 (Italy)
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.
- OSTI ID:
- 22370677
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 02; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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