Scale-dependent bias and bispectrum in neutrino separate universe simulations

Abstract

Cosmic background neutrinos have a large velocity dispersion, which causes the evolution of long-wavelength density perturbations to depend on scale. This scale-dependent growth leads to the well-known suppression in the linear theory matter power spectrum that is used to probe neutrino mass. In this paper, we study the impact of long-wavelength density perturbations on small-scale structure formation. By performing separate universe simulations where the long-wavelength mode is absorbed into the local expansion, we measure the responses of the cold dark matter (CDM) power spectrum and halo mass function, which correspond to the squeezed-limit bispectrum and halo bias. We find that the scale-dependent evolution of the long-wavelength modes causes these quantities to depend on scale and provide simple expressions to model them in terms of scale and the amount of massive neutrinos. Importantly, this scale-dependent bias reduces the suppression in the linear halo power spectrum due to massive neutrinos by 13 and 26% for objects of bias $\bar{b}=2$ and $\bar{b}\gg 1$, respectively. We demonstrate with high statistical significance that the scale-dependent halo bias $cannot$ be modeled by the CDM and neutrino density transfer functions at the time when the halos are identified. This reinforces the importance of the temporal nonlocality of structure formation, especially when the growth is scale dependent.

24 pages, 18 figures; additional appendix for comparison with neutrino particle simulations; matches PRD accepted version

References in corpus (16)

• Massive neutrinos and cosmology
• Transients from Initial Conditions in Cosmological Simulations
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• Separate Universe Simulations
• Simulating nonlinear cosmological structure formation with massive neutrinos
• Position-dependent power spectrum of the large-scale structure: a novel method to measure the squeezed-limit bispectrum
• Halo bias in mixed dark matter cosmologies
• Massive Neutrinos in Cosmology: Analytic Solutions and Fluid Approximation
• Structure formation with massive neutrinos: going beyond linear theory
• Spherical collapse in $\nu \Lambda CDM$
• Precision reconstruction of the dark matter-neutrino relative velocity from N-body simulations
• The Evolution of Bias - Generalized
• Scale-dependent halo bias from scale-dependent growth
• Quintessential Scale Dependence from Separate Universe Simulations
• The Lyman-$\alpha$ power spectrum - CMB lensing convergence cross-correlation
• Separate Universes beyond General Relativity

Cited by in corpus (46)

• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• Large-scale dark matter simulations
• Cosmological Parameters and Neutrino Masses from the Final Planck and Full-Shape BOSS Data
• Measuring neutrino masses with large-scale structure: Euclid forecast with controlled theoretical error
• The promising future of a robust cosmological neutrino mass measurement
• Scale-dependent galaxy bias, CMB lensing-galaxy cross-correlation, and neutrino masses
• Phenomenology of Modified Gravity at Recombination
• Bias due to neutrinos must not uncorrect'd go
• An Efficient and Accurate Hybrid Method for Simulating Non-Linear Neutrino Structure
• Galaxy bias and primordial non-Gaussianity: insights from galaxy formation simulations with IllustrisTNG
• Neutrino masses and beyond-$\Lambda$CDM cosmology with LSST and future CMB experiments
• DEMNUni: Massive neutrinos and the bispectrum of large scale structures
• Galaxy bias from forward models: linear and second-order bias of IllustrisTNG galaxies
• Reducing Noise in Cosmological N-body Simulations with Neutrinos
• 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
• Efficient Computation of Galaxy Bias with Neutrinos and Other Relics
• Neutrino Mass from Cosmology: Probing Physics Beyond the Standard Model
• Higher-order initial conditions with massive neutrinos
• Baryon-CDM isocurvature galaxy bias with IllustrisTNG
• Responses of Halo Occupation Distributions: a new ingredient in the halo model & the impact on galaxy bias
• Weighing neutrinos with the halo environment
• The cosmic neutrino background as a collection of fluids in large-scale structure simulations
• Gravitational wave fossils in nonlinear regime: halo tidal bias and intrinsic alignments from gravitational wave separate universe simulations
• Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect
• Local Primordial Non-Gaussianities and Super-Sample Variance
• The position-dependent matter density probability distribution function
• Covariances for cosmic shear and galaxy-galaxy lensing in the response approach
• BE-HaPPY: Bias Emulator for Halo Power Spectrum including massive neutrinos
• Measurement of Void Bias Using Separate Universe Simulations
• Separate Universe Void Bias
• A new scale in the bias expansion
• Relativistic bias in neutrino cosmologies
• Robust Neural Network-Enhanced Estimation of Local Primordial Non-Gaussianity
• Neutrino mass constraints beyond linear order: cosmology dependence and systematic biases
• Constraining the neutrino mass using a multi-tracer combination of two galaxy surveys and CMB lensing
• Estimating the Integrated Bispectrum from Weak Lensing Maps
• Neutrino winds on the sky
• Quintessential Isocurvature in Separate Universe Simulations
• Improved Modeling of the Kinematic Sunyaev-Zel'dovich Projected-Fields signal and its Cosmological Dependence
• Imprint of massive neutrinos on Persistent Homology of large-scale structure
• Position-dependent Voronoi probability distribution functions for matter and halos
• Scale-dependent halo bias and the squeezed limit bispectrum in the presence of radiation
• Quijote PNG: The information content of the halo power spectrum and bispectrum
• Slow neutrinos: non-linearity and momentum-space emulation