The halo bispectrum as a sensitive probe of massive neutrinos and baryon physics

Abstract

The power spectrum has been a workhorse for cosmological studies of large-scale structure. However, the present-day matter distribution is highly non-Gaussian and significant cosmological information is also contained in higher-order correlation functions. Meanwhile, baryon physics (particularly AGN feedback) has previously been shown to strongly affect the two-point statistics but there has been limited exploration of its effects on higher-order functions to date. Here we use the BAHAMAS suite of cosmological hydrodynamical simulations to explore the effects of baryon physics and massive neutrinos on the halo bispectrum. In contrast to matter clustering which is suppressed by baryon physics, we find that the halo clustering is typically enhanced. The strength of the effect and the scale over which it extends depends on how haloes are selected. On small scales (k > 1 $h$ Mpc${}^{-1}$, dominated by satellites of groups/clusters), we find that the bispectrum is highly sensitive to the efficiency of star formation and feedback, making it an excellent testing ground for galaxy formation models. We show that the effects of feedback and the effects of massive neutrinos are largely separable (independent of each other) and that massive neutrinos strongly suppress the halo bispectrum on virtually all scales up to the free-streaming length (apart from the smallest scales, where baryon physics dominates). The strong sensitivity of the bispectrum to neutrinos on the largest scales and galaxy formation physics on the smallest scales bodes well for upcoming precision measurements from the next generation of wide-field surveys.

arXiv comment13 pages, 6+3 figures. Published in MNRAS

References in corpus (84)

• The cosmological simulation code GADGET-2
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Efficient Computation of CMB anisotropies in closed FRW models
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Cosmological parameters from SDSS and WMAP
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Populating a cluster of galaxies - I. Results at z=0
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• Large-Scale Structure of the Universe and Cosmological Perturbation Theory
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Tensions between the Early and the Late Universe
• Substructures in hydrodynamical cluster simulations
• Massive neutrinos and cosmology
• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• The physics driving the cosmic star formation history
• The 2dF Galaxy Redshift Survey: The bias of galaxies and the density of the Universe
• Renormalized Cosmological Perturbation Theory
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• The BAHAMAS project: Calibrated hydrodynamical simulations for large-scale structure cosmology
• The effects of galaxy formation on the matter power spectrum: A challenge for precision cosmology
• Baryon effects on the internal structure of LCDM halos in the EAGLE simulations
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: RSD measurement from the power spectrum and bispectrum of the DR12 BOSS galaxies
• Quantifying the effect of baryon physics on weak lensing tomography
• nbodykit: an open-source, massively parallel toolkit for large-scale structure
• Halo mass function: Baryon impact, fitting formulae and implications for cluster cosmology
• Accurate Estimators of Correlation Functions in Fourier Space
• The power spectrum and bispectrum of SDSS DR11 BOSS galaxies I: bias and gravity
• SZ effects in the Magneticum Pathfinder Simulation: Comparison with the Planck, SPT, and ACT results
• A new method to quantify the effects of baryons on the matter power spectrum
• Flowing with Time: a New Approach to Nonlinear Cosmological Perturbations
• Cosmological parameters from CMB measurements and the final 2dFGRS power spectrum
• Large-scale bias in the Universe: bispectrum method
• RegPT: Direct and fast calculation of regularized cosmological power spectrum at two-loop order
• The Bispectrum: From Theory to Observations
• Halo Stochasticity from Exclusion and non-linear Clustering
• The impact of galaxy formation on the total mass, mass profile and abundance of haloes
• CFHTLenS: Cosmological constraints from a combination of cosmic shear two-point and three-point correlations
• Multi-Point Propagators in Cosmological Gravitational Instability
• The BAHAMAS project: the CMB--large-scale structure tension and the roles of massive neutrinos and galaxy formation
• The Bispectrum of IRAS Galaxies
• Modelling baryonic feedback for survey cosmology
• Exploring the effects of galaxy formation on matter clustering through a library of simulation power spectra
• An efficient implementation of massive neutrinos in non-linear structure formation simulations
• Effect of baryonic feedback on two- and three-point shear statistics: prospects for detection and improved modelling
• Constraining $M_{\nu }$ with the Bispectrum I: Breaking Parameter Degeneracies
• The Effective Field Theory of Large Scale Structure at Two Loops: the apparent scale dependence of the speed of sound
• Detection of Baryon Acoustic Oscillation Features in the Large-Scale 3-Point Correlation Function of SDSS BOSS DR12 CMASS Galaxies
• Measuring neutrino masses with large-scale structure: Euclid forecast with controlled theoretical error
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Signs of neutrino mass in current cosmological datasets
• Cosmological information in the redshift-space bispectrum
• High-order galaxy correlation functions in the APM Galaxy Survey
• Constraining $M_{\nu }$ with the Bispectrum II: The Total Information Content of the Galaxy Bispectrum
• The One-Loop Matter Bispectrum in the Effective Field Theory of Large Scale Structures
• The large-scale 3-point correlation function of the SDSS BOSS DR12 CMASS galaxies
• The effect of AGN feedback on the halo mass function
• The impact of baryonic processes on the two-point correlation functions of galaxies, subhaloes and matter
• Statistical Analysis of Galaxy Surveys-II. The 3-point galaxy correlation function measured from the 2dFGRS
• The Three-Point Correlation Function of Luminous Red Galaxies in the Sloan Digital Sky Survey
• Constructing Regularized Cosmic Propagators
• Primordial Non-Gaussianity from Biased Tracers: Likelihood Analysis of Real-Space Power Spectrum and Bispectrum
• The power spectrum and bispectrum of SDSS DR11 BOSS galaxies II: cosmological interpretation
• A Detection of the Baryon Acoustic Oscillation Features in the SDSS BOSS DR12 Galaxy Bispectrum
• The separate and combined effects of baryon physics and neutrino free-streaming on large-scale structure
• Three-Point Correlation Functions of SDSS Galaxies: Luminosity and Color Dependence in Redshift and Projected Space
• Testing one-loop galaxy bias: joint analysis of power spectrum and bispectrum
• On the impact of galaxy bias uncertainties on primordial non-Gaussianity constraints
• Galaxy redshift-space bispectrum: the Importance of Being Anisotropic
• Toward a robust inference method for the galaxy bispectrum: likelihood function and model selection
• The Monopole Moment of the Three-Point Correlation Function of the 2-degree Field Galaxy Redshift Survey
• Simultaneous modelling of matter power spectrum and bispectrum in the presence of baryons
• Baryonic effects on the matter bispectrum
• Matter bispectrum of large-scale structure: Three-dimensional comparison between theoretical models and numerical simulations
• Impact of baryons on the cluster mass function and cosmological parameter determination
• Information content in the redshift-space galaxy power spectrum and bispectrum
• Shot noise and biased tracers: a new look at the halo model
• Cosmology with anisotropic galaxy clustering from the combination of power spectrum and bispectrum
• Geometrical compression: a new method to enhance the BOSS galaxy bispectrum monopole constraints
• Precise Calibration of the One-Loop Bispectrum in the Effective Field Theory of Large Scale Structure
• The cosmic neutrino background as a collection of fluids in large-scale structure simulations
• The BAHAMAS project: Effects of dynamical dark energy on large-scale structure
• Efficient parallel algorithm for estimating higher-order polyspectra
• The BAHAMAS project: Effects of a running scalar spectral index on large-scale structure
• A joint 2- and 3-point clustering analysis of the VIPERS PDR2 catalogue at z~1: breaking the degeneracy of cosmological parameters
• Cross-bispectra Constraints on Modified Gravity Theories from Nancy Grace Roman Space Telescope and Rubin Observatory Legacy Survey of Space and Time

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• Modal compression of the redshift-space galaxy bispectrum
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• Redshift-space galaxy bispectrum in presence of massive neutrinos: A multipole expansion approach for Euclid
• Perturbation Theory Remixed II: Improved Modeling of Nonlinear Bispectrum