MassiveNuS: Cosmological massive neutrino simulations

Jia Liu, Simeon Bird, José Manuel Zorrilla Matilla, J. Colin Hill, Zoltán Haiman, Mathew S. Madhavacheril, David N. Spergel, Andrea Petri

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

The non-zero mass of neutrinos suppresses the growth of cosmic structure on small scales. Since the level of suppression depends on the sum of the masses of the three active neutrino species, the evolution of large-scale structure is a promising tool to constrain the total mass of neutrinos and possibly shed light on the mass hierarchy. In this work, we investigate these effects via a large suite of N-body simulations that include massive neutrinos using an analytic linear-response approximation: the Cosmological Massive Neutrino Simulations (MassiveNuS). The simulations include the effects of radiation on the background expansion, as well as the clustering of neutrinos in response to the nonlinear dark matter evolution. We allow three cosmological parameters to vary: the neutrino mass sum Mν in the range of 0-0.6 eV, the total matter density Ωm, and the primordial power spectrum amplitude As. The rms density fluctuation in spheres of 8 comoving Mpc/h (σ8) is a derived parameter as a result. Our data products include N-body snapshots, halo catalogues, merger trees, ray-traced galaxy lensing convergence maps for four source redshift planes between zs=1-2.5, and ray-traced cosmic microwave background lensing convergence maps. We describe the simulation procedures and code validation in this paper. The data are publicly available at http://columbialensing.org.

Original languageEnglish (US)
Article number049
JournalJournal of Cosmology and Astroparticle Physics
Volume2018
Issue number3
DOIs
StatePublished - Mar 29 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Keywords

  • cosmological parameters from LSS
  • cosmological simulations
  • neutrino masses from cosmology

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    Liu, J., Bird, S., Matilla, J. M. Z., Hill, J. C., Haiman, Z., Madhavacheril, M. S., Spergel, D. N., & Petri, A. (2018). MassiveNuS: Cosmological massive neutrino simulations. Journal of Cosmology and Astroparticle Physics, 2018(3), [049]. https://doi.org/10.1088/1475-7516/2018/03/049