Combined full shape analysis of BOSS galaxies and eBOSS quasars using an iterative emulator

Abstract

Standard full-shape clustering analyses in Fourier space rely on a fixed power spectrum template, defined at the fiducial cosmology used to convert redshifts into distances, and compress the cosmological information into the Alcock-Paczynski parameters and the linear growth rate of structure. In this paper, we propose an analysis method that operates directly in the cosmology parameter space and varies the power spectrum template accordingly at each tested point. Predictions for the power spectrum multipoles from the TNS model are computed at different cosmologies in the framework of $\Lambda \mathrm{CDM}$. Applied to the final eBOSS QSO and LRG samples together with the low-z DR12 BOSS galaxy sample, our analysis results in a set of constraints on the cosmological parameters ${\Omega }_{\mathrm{cdm}}$, $H_0$, ${\sigma }_8$, ${\Omega }_{\mathrm{b}}$ and $n_s$. To reduce the number of computed models, we construct an iterative process to sample the likelihood surface, where each iteration consists of a Gaussian process regression. This method is validated with mocks from N-body simulations. From the combined analysis of the (e)BOSS data, we obtain the following constraints: ${\sigma }_8=0.877\pm 0.049$ and ${\Omega }_{\mathrm{m}}=0.304_{-0.010}^{+0.016}$ without any external prior. The eBOSS quasar sample alone shows a $3.1\sigma$ discrepancy compared to the Planck prediction.

arXiv comment13 pages, 7 figures

References in corpus (36)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
• Cosmology and Fundamental Physics with the Euclid Satellite
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data
• The Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• Cosmological Parameters from the BOSS Galaxy Power Spectrum
• Baryon Acoustic Oscillations in 2D: Modeling Redshift-space Power Spectrum from Perturbation Theory
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the Quasar Sample in configuration space between redshift 0.8 and 2.2
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic power spectrum between redshifts 0.6 and 1.0
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the Quasar sample between redshift 0.8 and 2.2
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space
• The Clustering of Galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Including covariance matrix errors
• HACC: Simulating Sky Surveys on State-of-the-Art Supercomputing Architectures
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological implications of the configuration-space clustering wedges
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Quasar Target Selection
• Understanding higher-order nonlocal halo bias at large scales by combining the power spectrum with the bispectrum
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the emission line galaxy sample from the anisotropic power spectrum between redshift 0.6 and 1.1
• RegPT: Direct and fast calculation of regularized cosmological power spectrum at two-loop order
• Cosmology from large-scale structure: Constraining $\Lambda$CDM with BOSS
• Efficient Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Growth rate of structure measurement from anisotropic clustering analysis in configuration space between redshift 0.6 and 1.1 for the Emission Line Galaxy sample
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Cosmological implications of the Fourier space wedges of the final sample
• The Aemulus Project III: Emulation of the Galaxy Correlation Function
• The SDSS-IV extended Baryonic Oscillation Spectroscopic Survey: Luminous Red Galaxy Target Selection
• Full-shape cosmology analysis of SDSS-III BOSS galaxy power spectrum using emulator-based halo model: a $5\%$ determination of ${\sigma }_8$
• Cosmic Emulation: Fast Predictions for the Galaxy Power Spectrum
• Arguments against using $h^{-1}\mathrm{Mpc}$ units in observational cosmology
• Integral constraints in spectroscopic surveys
• The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: N-body Mock Challenge for the Quasar Sample
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: N-body Mock Challenge for the eBOSS Emission Line Galaxy Sample
• Primordial non-Gaussianity from the Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey I: Catalogue Preparation and Systematic Mitigation
• Cosmological parameter estimation via iterative emulation of likelihoods

Cited by in corpus (11)

• Cosmology with the EFTofLSS and BOSS: dark energy constraints and a note on priors
• Full-Shape Galaxy Power Spectra and the Curvature Tension
• Field Level Neural Network Emulator for Cosmological N-body Simulations
• Cosmological inference from the EFTofLSS: the eBOSS QSO full-shape analysis
• Cosmological constraints from the power spectrum of eBOSS quasars
• Updating non-standard neutrinos properties with Planck-CMB data and full-shape analysis of BOSS and eBOSS galaxies
• The Aemulus Project VI: Emulation of beyond-standard galaxy clustering statistics to improve cosmological constraints
• Accelerating cosmological inference with Gaussian processes and neural networks -- an application to LSST Y1 weak lensing and galaxy clustering
• Extracting high-order cosmological information in galaxy surveys with power spectra
• Halo Occupation Distribution of Emission Line Galaxies: fitting method with Gaussian Processes
• Model-agnostic interpretation of 10 billion years of cosmic evolution traced by BOSS and eBOSS data