Non-linear evolution of the cosmic neutrino background

Abstract

We investigate the non-linear evolution of the relic cosmic neutrino background by running large box-size, high resolution N-body simulations. Our set of simulations explore the properties of neutrinos in a reference $\Lambda$CDM model with total neutrino masses between 0.05-0.60 eV in cold dark matter haloes of mass $10^{11}-10^{15}$ $h^{-1}$M${}_{\odot }$, over a redshift range $z=0-2$. We compute the halo mass function and show that it is reasonably well fitted by the Sheth-Tormen formula. More importantly, we focus on the CDM and neutrino properties of the density and peculiar velocity fields in the cosmological volume, inside and in the outskirts of virialized haloes. The dynamical state of the neutrino particles depends strongly on their momentum: whereas neutrinos in the low velocity tail behave similarly to CDM particles, neutrinos in the high velocity tail are not affected by the clustering of the underlying CDM component. We find that the neutrino (linear) unperturbed momentum distribution is modified and mass and redshift dependent deviations from the expected Fermi-Dirac distribution are in place both in the cosmological volume and inside haloes. The neutrino density profiles around virialized haloes have been carefully investigated and a simple fitting formula is provided. The neutrino profile, unlike the cold dark matter one, is found to be cored with core size and central density that depend on the neutrino mass, redshift and mass of the halo, for halos of masses larger than $\sim 10^{13.5}{h}^{-1}$M${}_{\odot }$. For lower masses the neutrino profile is best fitted by a simple power-law relation in the range probed by the simulations. Our findings are particularly important in view of upcoming large-scale structure surveys, like Euclid, that are expected to probe the non-linear regime at the percent level with lensing and clustering observations.

24 pages, 15 figures, JCAP accepted. Movies can be found at http://som.ific.uv.es/movies

References in corpus (11)

• Massive neutrinos and cosmology
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Global fit to three neutrino mixing: critical look at present precision
• Virial Scaling of Massive Dark Matter Halos: Why Clusters Prefer a High Normalization Cosmology
• The Density Profiles of Massive, Relaxed Galaxy Clusters. II. Separating Luminous and Dark Matter in Cluster Cores
• The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum
• Neutrino masses and cosmological parameters from a Euclid-like survey: Markov Chain Monte Carlo forecasts including theoretical errors
• Massive Neutrinos in Cosmology: Analytic Solutions and Fluid Approximation
• Measuring neutrino masses with a future galaxy survey
• Neutrino mass constraint with the Sloan Digital Sky Survey power spectrum of luminous red galaxies and perturbation theory
• Are Neutrinos Their Own Antiparticles?

Cited by in corpus (64)

• Fundamental Physics with the Square Kilometre Array
• The Quijote simulations
• Neutrino Physics from the Cosmic Microwave Background and Large Scale Structure
• Cosmology with massive neutrinos II: on the universality of the halo mass function and bias
• DEMNUni: The clustering of large-scale structures in the presence of massive neutrinos
• Detection of the Splashback Radius and Halo Assembly bias of Massive Galaxy Clusters
• Cosmology with massive neutrinos I: towards a realistic modeling of the relation between matter, haloes and galaxies
• gevolution: a cosmological N-body code based on General Relativity
• Cosmology with massive neutrinos III: the halo mass function and an application to galaxy clusters
• Constraining $M_{\nu }$ with the Bispectrum I: Breaking Parameter Degeneracies
• Voids in massive neutrino cosmologies
• Cosmic Degeneracies I: Joint N-body Simulations of Modified Gravity and Massive Neutrinos
• Measuring neutrino masses with large-scale structure: Euclid forecast with controlled theoretical error
• MassiveNuS: Cosmological Massive Neutrino Simulations
• Simulating nonlinear cosmological structure formation with massive neutrinos
• Fisher for complements: Extracting cosmology and neutrino mass from the counts-in-cells PDF
• Constraining $M_{\nu }$ with the Bispectrum II: The Total Information Content of the Galaxy Bispectrum
• Constraining chameleon models with cosmology
• Halo bias in mixed dark matter cosmologies
• The imprint of neutrinos on clustering in redshift-space
• Initial Conditions for Accurate N-Body Simulations of Massive Neutrino Cosmologies
• Detecting Neutrino Mass by Combining Matter Clustering, Halos, and Voids
• Cosmic voids in modified gravity models with massive neutrinos
• DEMNUni: ISW, Rees-Sciama, and weak-lensing in the presence of massive neutrinos
• Relativistic N-body simulations with massive neutrinos
• An Efficient and Accurate Hybrid Method for Simulating Non-Linear Neutrino Structure
• Weighing neutrinos with cosmic neutral hydrogen
• Spherical collapse in $\nu \Lambda CDM$
• The halo model in a massive neutrino cosmology
• Scale-dependent bias and bispectrum in neutrino separate universe simulations
• Cosmological neutrino simulations at extreme scale
• Precision reconstruction of the dark matter-neutrino relative velocity from N-body simulations
• Reducing Noise in Cosmological N-body Simulations with Neutrinos
• Biases from neutrino bias: to worry or not to worry?
• How to add massive neutrinos to your $\Lambda$CDM simulation -- extending cosmology rescaling algorithms
• First detection of scale-dependent linear halo bias in $N$-body simulations with massive neutrinos
• Neutrino clustering around spherical dark matter halos
• Suite of Hydrodynamical Simulations for the Lyman-Alpha Forest with Massive Neutrinos
• Neutrino constraints: what large-scale structure and CMB data are telling us?
• The effect of massive neutrinos on the Sunyaev-Zeldovich and X-ray observables of galaxy clusters
• Differential Neutrino Condensation onto Cosmic Structure
• Systematic errors in the measurement of neutrino masses due to baryonic feedback processes: Prospects for stage IV lensing surveys
• DEMNUni: comparing nonlinear power spectra prescriptions in the presence of massive neutrinos and dynamical dark energy
• Annual Modulation of Cosmic Relic Neutrinos
• Constraining neutrino properties with a Euclid-like galaxy cluster survey
• A new approach to cosmological structure formation with massive neutrinos
• Simulating cosmologies beyond $\Lambda$CDM with PINOCCHIO
• Clustering and redshift-space distortions in modified gravity models with massive neutrinos
• Probing massive neutrinos with the Minkowski functionals of large-scale structure
• Cosmic neutrinos: dispersive and non-linear
• The Effect of Thermal Velocities on Structure Formation in N-body Simulations of Warm Dark Matter
• Probing massive neutrinos with the Minkowski functionals of the galaxy distribution
• Discriminating between Thermal and Nonthermal Cosmic Relic Neutrinos through Annual Modulation at PTOLEMY
• The dark matter dispersion tensor in perturbation theory
• BE-HaPPY: Bias Emulator for Halo Power Spectrum including massive neutrinos
• Effects of neutrino mass and asymmetry on cosmological structure formation
• Influence of local structure on relic neutrino abundances and anisotropies
• Distinguishing Dirac vs. Majorana Neutrinos: a Cosmological Probe
• Neutrino winds on the sky
• A Minimal Model for Massive Neutrinos in Newtonian N-body Simulations
• Constraining the Neutrino Mass with the Drifting Coefficient of the Field Cluster Mass Function
• Weak-lensing tunnel voids in simulated light cones: A new pipeline to investigate modified gravity and massive neutrinos signatures
• A New Census of the Universe's Entropy
• Elucidating the impact of massive neutrinos on halo assembly bias