Impact of intrinsic alignments on clustering constraints of the growth rate

Abstract

Intrinsic alignments between galaxies and the large-scale structure contaminate galaxy clustering analyses and impact constraints on galaxy bias and the growth rate of structure in the Universe. This is the result of alignments inducing a selection effect on spectroscopic samples which is correlated with the large-scale structure. In this work, we quantify the biases on galaxy bias and the growth rate when alignments are neglected. We also examine different options for the mitigation of alignments by considering external priors on the effect and different probe combinations. We find that conservative analyses that restrict to $k_{\max }=0.1$ Mpc${}^{-1}$ are not significantly affected. However, analyses that aim to go to higher wave numbers could evidence a significant contamination from alignments. In those cases, including a prior on alignment amplitude, or combining clustering with the position-intrinsic shape correlation of galaxies, can recover the same expected constraining power, or even inform bias and growth rate measurements.

arXiv comment8 pages, 3 figures

References in corpus (44)

• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• An All-Sky Analysis of Polarization in the Microwave Background
• Statistics of Cosmic Microwave Background Polarization
• Intrinsic alignment-lensing interference as a contaminant of cosmic shear
• The 6dF Galaxy Survey: z \approx 0 measurement of the growth rate and sigma_8
• The Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• Intrinsic and Extrinsic Galaxy Alignment
• 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
• 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
• Core Cosmology Library: Precision Cosmological Predictions for LSST
• Testing cosmological structure formation using redshift-space distortions
• Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys
• Detection of large scale intrinsic ellipticity-density correlation from the Sloan Digital Sky Survey and implications for weak lensing surveys
• Observational Tests of Modified Gravity
• Constraints on intrinsic alignment contamination of weak lensing surveys using the MegaZ-LRG sample
• Beyond linear galaxy alignments
• A 2.5% measurement of the growth rate from small-scale redshift space clustering of SDSS-III CMASS galaxies
• Intrinsic alignments of SDSS-III BOSS LOWZ sample galaxies
• 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
• Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix
• A new analysis of galaxy 2-point functions in the BOSS survey, including full-shape information and post-reconstruction BAO
• Testing the tidal alignment model of galaxy intrinsic alignment
• Comprehensive Two-Point Analyses of Weak Gravitational Lensing Surveys
• Probing dark energy with the shear-ratio geometric test
• The halo model as a versatile tool to predict intrinsic alignments
• Full-shape cosmology analysis of SDSS-III BOSS galaxy power spectrum using emulator-based halo model: a $5\%$ determination of ${\sigma }_8$
• BOSS Correlation Function Analysis from the Effective Field Theory of Large-Scale Structure
• KiDS+GAMA: Intrinsic alignment model constraints for current and future weak lensing cosmology
• An EFT description of galaxy intrinsic alignments
• Stringent ${\sigma }_8$ constraints from small-scale galaxy clustering using a hybrid MCMC+emulator framework
• Tidal alignments as a contaminant of redshift space distortions
• Forecasting the Cosmological Constraints with Anisotropic Baryon Acoustic Oscillations from Multipole Expansion
• Improving geometric and dynamical constraints on cosmology with intrinsic alignments of galaxies
• Information content in the redshift-space galaxy power spectrum and bispectrum
• Power spectrum multipoles on the curved sky: an application to the 6-degree Field Galaxy Survey
• KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies
• Self-calibration of weak lensing systematic effects using combined two- and three-point statistics
• A Radial Measurement of the Galaxy Tidal Alignment Magnitude with BOSS Data
• Fundamental Plane of BOSS galaxies: Correlations with galaxy properties, density field and impact on RSD measurements
• Prospects for detection and application of the alignment of galaxies with the large-scale velocity field

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• First Constraints on Growth Rate from Redshift-Space Ellipticity Correlations of SDSS Galaxies at $0.16<z<0.70$
• The alignment of galaxies at the Baryon Acoustic Oscillation scale
• Nonlinear redshift space distortion in halo ellipticity correlations: Analytical model and N-body simulations
• A rising tide: Intrinsic alignments since the turn of the millennium
• Information content in anisotropic cosmological fields: Impact of different multipole expansion scheme for galaxy density and ellipticity correlations