Perturbation theory models for LSST-era galaxy clustering: tests with sub-percent mock catalog measurements in Fourier and configuration space

Abstract

We analyze the clustering of galaxies using the z=1.006 snapshot of the CosmoDC2 simulation, a high-fidelity synthetic galaxy catalog designed to validate analysis methods for the Large Synoptic Survey Telescope (LSST). We present sub-percent measurements of the galaxy auto-correlation and galaxy-dark matter cross correlations in Fourier space and configuration space for a magnitude-limited galaxy sample. At these levels of precision, the statistical errors of the measurement are comparable to the systematic effects present in the simulation and measurement procedure; nevertheless, using a hybrid-PT model, we are able to model non-linear galaxy bias with 0.5% precision up to scales of $k_{\max }=0.5h/\mathrm{Mpc}$ and $r_{\min }=4\mathrm{Mpc}/h$. While the linear bias parameter is measured with 0.01% precision, other bias parameters are determined with considerably weaker constraints and sometimes bimodal posterior distributions. We compare our fiducial model with lower dimensional models where the higher-order bias parameters are fixed at their co-evolution values and find that leaving these parameters free provides significant improvements in our ability to model small scale information. We also compare bias parameters for galaxy samples defined using different magnitude bands and find agreement between samples containing equal numbers of galaxies. Finally, we compare bias parameters between Fourier space and configuration space and find moderate tension between the two approaches. Although our model is often unable to fit the CosmoDC2 galaxy samples within the 0.1% precision of our measurements, our results suggest that the hybrid-PT model used in this analysis is capable of modeling non-linear galaxy bias within the percent level precision needed for upcoming galaxy surveys.

References in corpus (64)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Stable clustering, the halo model and nonlinear cosmological power spectra
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Revising the Halofit Model for the Nonlinear Matter Power Spectrum
• The Halo Occupation Distribution: Towards an Empirical Determination of the Relation Between Galaxies and Mass
• Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies
• Large-Scale Galaxy Bias
• KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
• Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
• Cosmological Non-Linearities as an Effective Fluid
• The Effective Field Theory of Cosmological Large Scale Structures
• Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
• Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space
• The Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
• Clustering of dark matter tracers: generalizing bias for the coming era of precision LSS
• Galacticus: A Semi-Analytic Model of Galaxy Formation
• Gravity and Large-Scale Non-local Bias
• Core Cosmology Library: Precision Cosmological Predictions for LSST
• nbodykit: an open-source, massively parallel toolkit for large-scale structure
• The IR-resummed Effective Field Theory of Large Scale Structures
• Convolution Lagrangian perturbation theory for biased tracers
• The MICE Grand Challenge Lightcone Simulation I: Dark matter clustering
• Bias in the Effective Field Theory of Large Scale Structures
• The BACCO Simulation Project: Exploiting the full power of large-scale structure for cosmology
• Understanding higher-order nonlocal halo bias at large scales by combining the power spectrum with the bispectrum
• The MICE Grand Challenge Lightcone Simulation III: Galaxy lensing mocks from all-sky lensing maps
• An algorithm to build mock galaxy catalogues using MICE simulations
• A Lagrangian effective field theory
• FAST-PT: a novel algorithm to calculate convolution integrals in cosmological perturbation theory
• The Aemulus Project I: Numerical Simulations for Precision Cosmology
• CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST
• The Abacus Cosmos: A Suite of Cosmological N-body Simulations
• The Outer Rim Simulation: A Path to Many-Core Supercomputers
• The LSST Dark Energy Science Collaboration (DESC) Science Requirements Document
• Beyond Limber: Efficient computation of angular power spectra for galaxy clustering and weak lensing
• The cosmology dependence of galaxy clustering and lensing from a hybrid $N$-body-perturbation theory model
• The LSST DESC DC2 Simulated Sky Survey
• Simulations and symmetries
• FAST-PT II: an algorithm to calculate convolution integrals of general tensor quantities in cosmological perturbation theory
• On the Statistics of Biased Tracers in the Effective Field Theory of Large Scale Structures
• Cosmological constraints from the power spectrum of eBOSS emission line galaxies
• Tomographic galaxy clustering with the Subaru Hyper Suprime-Cam first year public data release
• Testing one-loop galaxy bias: joint analysis of power spectrum and bispectrum
• Halo bias in Lagrangian Space: Estimators and theoretical predictions
• Testing Subhalo Abundance Matching in Cosmological Smoothed Particle Hydrodynamics Simulations
• Matter Power Spectrum Covariance Matrix from the DEUS-PUR ΛCDM simulations: Mass Resolution and non-Gaussian Errors
• Hefty enhancement of cosmological constraints from the DES Y1 data using a Hybrid Effective Field Theory approach to galaxy bias
• Testing one-loop galaxy bias: Power spectrum
• Perturbation theory for modeling galaxy bias: validation with simulations of the Dark Energy Survey
• Integrated Perturbation Theory and One-loop Power Spectra of Biased Tracers
• Validating a minimal galaxy bias method for cosmological parameter inference using HSC-SDSS mock catalogs
• Consistency of cosmic shear analyses in harmonic and real space
• The Last Journey. I. An Extreme-Scale Simulation on the Mira Supercomputer
• DESCQA: An Automated Validation Framework for Synthetic Sky Catalogs
• Renormalisation of linear halo bias in N-body simulations
• DESC DC2 Data Release Note
• Hawaii Two-0: High-redshift galaxy clustering and bias

Cited by in corpus (3)

• Cosmology with 6 parameters in the Stage-IV era: efficient marginalisation over nuisance parameters
• Dark Energy Survey Year 3 Results: Constraints on cosmological parameters and galaxy bias models from galaxy clustering and galaxy-galaxy lensing using the redMaGiC sample
• The pairwise and cross-pairwise y-type polarised kinetic Sunyaev Zeldovich effect from transverse velocity of galaxy clusters