The WiggleZ Dark Energy Survey: measuring the cosmic growth rate with the two-point galaxy correlation function

Abstract

The growth history of large-scale structure in the Universe is a powerful probe of the cosmological model, including the nature of dark energy. We study the growth rate of cosmic structure to redshift $z=0.9$ using more than $162,000$ galaxy redshifts from the WiggleZ Dark Energy Survey. We divide the data into four redshift slices with effective redshifts $z=[0.2,0.4,0.6,0.76]$ and in each of the samples measure and model the 2-point galaxy correlation function in parallel and transverse directions to the line-of-sight. After simultaneously fitting for the galaxy bias factor we recover values for the cosmic growth rate which are consistent with our assumed $\Lambda$CDM input cosmological model, with an accuracy of around 20% in each redshift slice. We investigate the sensitivity of our results to the details of the assumed model and the range of physical scales fitted, making close comparison with a set of N-body simulations for calibration. Our measurements are consistent with an independent power-spectrum analysis of a similar dataset, demonstrating that the results are not driven by systematic errors. We determine the pairwise velocity dispersion of the sample in a non-parametric manner, showing that it systematically increases with decreasing redshift, and investigate the Alcock-Paczynski effects of changing the assumed fiducial model on the results. Our techniques should prove useful for current and future galaxy surveys mapping the growth rate of structure using the 2-dimensional correlation function.

arXiv comment11 pages, 9 figures

References in corpus (30)

• The Sloan Digital Sky Survey: Technical Summary
• Efficient Computation of CMB anisotropies in closed FRW models
• The 2dF Galaxy Redshift Survey: Spectra and redshifts
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations
• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• The WiggleZ Dark Energy Survey: Survey Design and First Data Release
• The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
• Measuring the cosmological constant with redshift surveys
• Interpreting large-scale redshift-space distortion measurements
• Cosmic Structure Growth and Dark Energy
• The WiggleZ Dark Energy Survey: Final data release and cosmological results
• The 2dF-SDSS LRG and QSO Survey: QSO clustering and the L-z degeneracy
• The 2dF Galaxy Redshift Survey: Spherical Harmonics analysis of fluctuations in the final catalogue
• Large-Scale Anisotropic Correlation Function of SDSS Luminous Red Galaxies
• Cosmological Redshift Distortion of Correlation Functions as a Probe of the Density Parameter and the Cosmological Constant
• On model selection forecasting, Dark Energy and modified gravity
• Comprehensive Two-Point Analyses of Weak Gravitational Lensing Surveys
• The cosmological bulk flow: consistency with $\Lambda$CDM and $z\approx 0$ constraints on ${\sigma }_8$ and $\gamma$
• The WiggleZ Dark Energy Survey: the selection function and z=0.6 galaxy power spectrum
• The Correlation Function in Redshift Space: General Formula with Wide-angle Effects and Cosmological Distortions
• Difficulties Distinguishing Dark Energy from Modified Gravity via Redshift Distortions
• Clustering of luminous red galaxies II: small scale redshift space distortions
• Constraints on modified gravity from the observed X-ray luminosity function of galaxy clusters
• The Pairwise Velocity Distribution of Galaxies in the Las Campanas Redshift Survey
• The Three Faces of Omega_m: Testing Gravity with Low and High Redshift SN Ia Surveys
• The Dependence of Galaxy Colors on Luminosity and Environment at z~0.4
• The WiggleZ Dark Energy Survey: small-scale clustering of Lyman Break Galaxies at z < 1

Cited by in corpus (51)

• Late-time cosmology with 21cm intensity mapping experiments
• The VIMOS Public Extragalactic Redshift Survey (VIPERS). Galaxy clustering and redshift-space distortions at z=0.8 in the first data release
• 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 Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at $z\sim 1.4$
• Galaxy And Mass Assembly (GAMA): improved cosmic growth measurements using multiple tracers of large-scale structure
• Simultaneous constraints on the growth of structure and cosmic expansion from the multipole power spectra of the SDSS DR7 LRG sample
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights
• The VIMOS Public Extragalactic Redshift Survey (VIPERS): The growth of structures at $0.5<z<1.2$ from redshift-space distortions in the clustering of the PDR-2 final sample
• Understanding higher-order nonlocal halo bias at large scales by combining the power spectrum with the bispectrum
• DEMNUni: The clustering of large-scale structures in the presence of massive neutrinos
• 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
• Blind foreground subtraction for intensity mapping experiments
• The WiggleZ Dark Energy Survey: constraining galaxy bias and cosmic growth with 3-point correlation functions
• MultiDark-Galaxies: data release and first results
• Measuring the growth of matter fluctuations with third-order galaxy correlations
• The clustering of ALFALFA galaxies: dependence on HI mass, relationship to optical samples & clues on host halo properties
• Cosmological Parameter Estimation with Large Scale Structure Observations
• The full-sky relativistic correlation function and power spectrum of galaxy number counts: I. Theoretical aspects
• The Clustering of Galaxies in the Completed SDSS-III Baryon Oscillation Spectroscopic Survey: single-probe measurements from DR12 galaxy clustering -- towards an accurate model
• Nonlocal Gravity and Structure in the Universe
• The WiggleZ Dark Energy Survey: Final Data Release and the Metallicity of UV-Luminous Galaxies
• Galaxy filaments as pearl necklaces
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: a multi-tracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate
• The environments of high redshift radio galaxies and quasars: probes of protoclusters
• Measuring the 2D Baryon Acoustic Oscillation signal of galaxies in WiggleZ: Cosmological constraints
• Can Holographic dark energy models fit the observational data?
• Probing non-standard gravity with the growth index: a background independent analysis
• Model selection and constraints from Holographic dark energy scenarios
• Cosmic Growth and Expansion Conjoined
• The BOSS-WiggleZ overlap region II: dependence of cosmic growth on galaxy type
• Exploring Cosmic Origins with CORE: Cluster Science
• Violation of the FRW consistency condition as a signature of backreaction
• On the Systematic Errors of Cosmological-Scale Gravity Tests using Redshift Space Distortion: Non-linear Effects and the Halo Bias
• Euclid preparation. XLI. Galaxy power spectrum modelling in real space
• Redshift-space distortions of galaxies, clusters and AGN: testing how the accuracy of growth rate measurements depends on scales and sample selections
• Group-galaxy correlations in redshift space as a probe of the growth of structure
• Redshift-space distortions from the cross-correlation of photometric populations
• Dynamics of Supersymmetric Chameleons
• Optimising Spectroscopic and Photometric Galaxy Surveys: Same-sky Benefits for Dark Energy and Modified Gravity
• Combining spectroscopic and photometric surveys using angular cross-correlations III: Galaxy bias and stochastisity
• A semi-analytical perspective on massive galaxies at $z\sim 0.55$
• Using the Modified Nearest Neighbor Method to Correct Fiber-collision Effects on Galaxy Clustering
• Biasing relation, environmental dependencies and estimation of the growth rate from star forming galaxies
• Cosmological surveys with multi-object spectrographs
• Measuring the matter energy density and Hubble parameter from Large Scale Structure
• Redshift evolution of the Hubble constant: Constraints and new insights from an interacting dark energy model
• Non-Linearity-Free prediction of the growth-rate $f{\sigma }_8$ using Convolutional Neural Networks
• Constraints to dark energy using PADE parameterisations
• The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Growth rate of structure measurement from cosmic voids
• Testing General Relativity with Cosmological Large Scale Structure
• Model-independent constraints on clustering and growth of cosmic structures from BOSS DR12 galaxies in harmonic space