Cosmic Emulation: Fast Predictions for the Galaxy Power Spectrum

Abstract

The halo occupation distribution (HOD) approach has proven to be an effective method for modeling galaxy clustering and bias. In this approach, galaxies of a given type are probabilistically assigned to individual halos in N-body simulations. In this paper, we present a fast emulator for predicting the fully nonlinear galaxy power spectrum over a range of freely specifiable HOD modeling parameters. The emulator is constructed using results from 100 HOD models run on a large LCDM N-body simulation, with Gaussian Process interpolation applied to a PCA-based representation of the galaxy power spectrum. The total error is currently ~3% (~2% in the simulation and ~1% in the emulation process) from z=1 to z=0, over the considered parameter range. We use the emulator to investigate parametric dependencies in the HOD model, as well as the behavior of galaxy bias as a function of HOD parameters. The emulator is publicly available at http://www.hep.anl.gov/cosmology/CosmicEmu/emu.html.

Replaced to match published version. The emulator can be downloaded at http://www.hep.anl.gov/cosmology/CosmicEmu/emu.html

References in corpus (12)

• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• A primer on hierarchical galaxy formation: the semi-analytical approach
• The Halo Mass Function: High-Redshift Evolution and Universality
• A critical look at cosmological perturbation theory techniques
• A 2.5% measurement of the growth rate from small-scale redshift space clustering of SDSS-III CMASS galaxies
• The 2dF-SDSS LRG and QSO survey: evolution of the clustering of luminous red galaxies since z = 0.6
• Cosmic Calibration: Constraints from the Matter Power Spectrum and the Cosmic Microwave Background
• Cosmic Calibration
• The Three-Point Correlation Function of Luminous Red Galaxies in the Sloan Digital Sky Survey
• First Galaxy-Galaxy Lensing Measurement of Satellite Halo Mass in the CFHT Stripe-82 Survey
• Looking at the relation between haloes and galaxies under the lens

Cited by in corpus (73)

• Unveiling $\nu$ secrets with cosmological data: neutrino masses and mass hierarchy
• HACC: Simulating Sky Surveys on State-of-the-Art Supercomputing Architectures
• Lensing is Low: Cosmology, Galaxy Formation, or New Physics?
• Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering
• On the improvement of cosmological neutrino mass bounds
• Large-scale dark matter simulations
• Constraining $M_{\nu }$ with the Bispectrum I: Breaking Parameter Degeneracies
• The Mira-Titan Universe: Precision Predictions for Dark Energy Surveys
• The Mira-Titan Universe II: Matter Power Spectrum Emulation
• The galaxy power spectrum take on spatial curvature and cosmic concordance
• The Aemulus Project III: Emulation of the Galaxy Correlation Function
• The High Latitude Spectroscopic Survey on the Nancy Grace Roman Space Telescope
• Constraining $M_{\nu }$ with the Bispectrum II: The Total Information Content of the Galaxy Bispectrum
• The cosmology dependence of galaxy clustering and lensing from a hybrid $N$-body-perturbation theory model
• Stringent ${\sigma }_8$ constraints from small-scale galaxy clustering using a hybrid MCMC+emulator framework
• Bayesian emulator optimisation for cosmology: application to the Lyman-alpha forest
• Five-percent measurements of the growth rate from simulation-based modelling of redshift-space clustering in BOSS LOWZ
• Dark Energy Survey Year 3 results: cosmology with moments of weak lensing mass maps -- validation on simulations
• Accurate and Efficient Halo-based Galaxy Clustering Modelling with Simulations
• Cosmology with galaxy-galaxy lensing on non-perturbative scales: Emulation method and application to BOSS LOWZ
• The Mira-Titan Universe IV. High Precision Power Spectrum Emulation
• Exploring the squeezed three-point galaxy correlation function with generalized halo occupation distribution models
• Matter bispectrum of large-scale structure: Three-dimensional comparison between theoretical models and numerical simulations
• An emulator for the Lyman-$\alpha$ forest in beyond-$\Lambda$CDM cosmologies
• FORGE -- the f(R) gravity cosmic emulator project I: Introduction and matter power spectrum emulator
• Weak Lensing Minima and Peaks: Cosmological Constraints and the Impact of Baryons
• A Hybrid Deep Learning Approach to Cosmological Constraints From Galaxy Redshift Surveys
• General framework for cosmological dark matter bounds using $N$-body simulations
• A fast particle-mesh simulation of non-linear cosmological structure formation with massive neutrinos
• DES Y1 Results: Validating cosmological parameter estimation using simulated Dark Energy Surveys
• Cosmological parameter estimation via iterative emulation of likelihoods
• Constraints on $S_8$ from a full-scale and full-shape analysis of redshift-space clustering and galaxy-galaxy lensing in BOSS
• Machine Learning for Observational Cosmology
• Neutrino mass and dark energy constraints from redshift-space distortions
• Redshift-space distortions in massive neutrino and evolving dark energy cosmologies
• Building high accuracy emulators for scientific simulations with deep neural architecture search
• Cosmological Evidence Modelling: a new simulation-based approach to constrain cosmology on non-linear scales
• Multi-Fidelity Emulation for the Matter Power Spectrum using Gaussian Processes
• $\text{matryoshka}$: Halo Model Emulator for the Galaxy Power Spectrum
• COMET: Clustering Observables Modelled by Emulated perturbation Theory
• Cosmological information content in redshift-space power spectrum of SDSS-like galaxies in the quasi-nonlinear regime up to $k=0.3h$Mpc${}^{-1}$
• The Halo Void (Dust) Model of Large Scale Structure
• Incorporating Astrochemistry into Molecular Line Modelling via Emulation
• HACC Cosmological Simulations: First Data Release
• CSST Cosmological Emulator I: Matter Power Spectrum Emulation with one percent accuracy to k = 10 h/Mpc
• Redshift requirements for cosmic shear with intrinsic alignment
• The Aemulus Project VI: Emulation of beyond-standard galaxy clustering statistics to improve cosmological constraints
• Investigating Cosmological GAN Emulators Using Latent Space Interpolation
• An Analytic Hybrid Halo + Perturbation Theory Model for Small-scale Correlators: Baryons, Halos, and Galaxies
• $\text{matryoshka}$ II: Accelerating Effective Field Theory Analyses of the Galaxy Power Spectrum
• BE-HaPPY: Bias Emulator for Halo Power Spectrum including massive neutrinos
• Combined full shape analysis of BOSS galaxies and eBOSS quasars using an iterative emulator
• Generating mock galaxy catalogues for flux-limited samples like the DESI Bright Galaxy Survey
• Application of the iterative reconstruction to simulated galaxy fields
• Full forward model of galaxy clustering statistics with AbacusSummit lightcones
• Primordial power spectrum features in phenomenological descriptions of inflation
• Differentiable Predictions for Large Scale Structure with SHAMNet
• Sesame: A power spectrum emulator pipeline for beyond-$\Lambda$CDM models
• Using galaxy pairs to investigate the three-point correlation function in the squeezed limit
• 2D k-th nearest neighbor statistics: a highly informative probe of galaxy clustering
• The BAHAMAS project: Evaluating the accuracy of the halo model in predicting the non-linear matter power spectrum
• Galaxy Clustering in the Mira-Titan Universe I: Emulators for the redshift space galaxy correlation function and galaxy-galaxy lensing
• A semi-analytic model of pairwise velocity distribution between dark matter halos
• CSST Cosmological Emulator II: Generalized Accurate Halo Mass Function Emulation
• Unraveling emission line galaxy conformity at z~1 with DESI early data
• Probing the cosmic web in Ly$\alpha$ emission over large scales: an Intensity Mapping forecast for DECaLS/BASS and DESI
• Extending evolution mapping to massive neutrinos with COMET
• Decorrelating the errors of the galaxy correlation function with compact transformation matrices
• Efficient sampling of non log-concave posterior distributions with mixture of noises
• Testing and Emulating Modified Gravity on Cosmological Scales
• An emulation-based model for the projected correlation function
• Reducing the Long Tail Losses in Scientific Emulations with Active Learning
• Neural network emulator to constrain the high-$z$ IGM thermal state from Lyman-$\alpha$ forest flux auto-correlation function