Five-percent measurements of the growth rate from simulation-based modelling of redshift-space clustering in BOSS LOWZ

Abstract

We use a simulation-based modelling approach to analyse the anisotropic clustering of the BOSS LOWZ sample over the radial range $0.4h^{-1}\mathrm{Mpc}$ to $63h^{-1}\mathrm{Mpc}$, significantly extending what is possible with a purely analytic modelling framework. Our full-scale analysis yields constraints on the growth of structure that are a factor of two more stringent than any other study on large scales at similar redshifts. We infer $f{\sigma }_8=0.471\pm 0.024$ at $z\approx 0.25$, and $f{\sigma }_8=0.431\pm 0.025$ at $z\approx 0.40$; the corresponding $\Lambda$CDM predictions of the Planck CMB analysis are $0.470\pm 0.006$ and $0.476\pm 0.005$, respectively. Our results are thus consistent with Planck, but also follow the trend seen in previous low-redshift measurements of $f{\sigma }_8$ falling slightly below the $\Lambda$CDM+CMB prediction. We find that small and large radial scales yield mutually consistent values of $f{\sigma }_8$, but there are $1-2.5\sigma$ hints of small scales ($<10h^{-1}\mathrm{Mpc}$) preferring lower values for $f{\sigma }_8$ relative to larger scales. We analyse the constraining power of the full range of radial scales, finding that most of the multipole information about $f{\sigma }_8$ is contained in the scales $2h^{-1}\mathrm{Mpc}\lesssim s\lesssim 20h^{-1}\mathrm{Mpc}$. Evidently, once the cosmological information of the quasi-to-nonlinear regime has been harvested, large-scale modes contain only modest additional information about structure growth. Finally, we compare predictions for the galaxy-galaxy lensing amplitude of the two samples against measurements from SDSS and assess the lensing-is-low effect in light of our findings.

28 pages, 17 figures, submitted to MNRAS, comments welcome

References in corpus (19)

• The NumPy array: a structure for efficient numerical computation
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• Galaxy Evolution from Halo Occupation Distribution Modeling of DEEP2 and SDSS Galaxy Clustering
• Planck evidence for a closed Universe and a possible crisis for cosmology
• Effects of Baryons and Dissipation on the Matter Power Spectrum
• 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
• Towards a Concordant Model of Halo Occupation Statistics
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Observational systematics and baryon acoustic oscillations in the correlation function
• The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at $z=0.15$
• Lensing is Low: Cosmology, Galaxy Formation, or New Physics?
• A 2.5% measurement of the growth rate from small-scale redshift space clustering of SDSS-III CMASS galaxies
• Late universe decaying dark matter can relieve the H_0 tension
• Velocity Bias from the Small Scale Clustering of SDSS-III BOSS Galaxies
• Constraining Anisotropic Baryon Oscillations
• Analytic Prediction of Baryonic Effects from the EFT of Large Scale Structures
• Tests of redshift-space distortions models in configuration space for the analysis of the BOSS final data release
• On the halo-mass and radial scale dependence of the lensing is low effect
• Looking at the relation between haloes and galaxies under the lens
• Decorrelating the errors of the galaxy correlation function with compact transformation matrices

Cited by in corpus (23)

• The High Latitude Spectroscopic Survey on the Nancy Grace Roman Space Telescope
• AbacusHOD: A highly efficient extended multi-tracer HOD framework and its application to BOSS and eBOSS data
• Cosmological Analysis of Three-Dimensional BOSS Galaxy Clustering and Planck CMB Lensing Cross Correlations via Lagrangian Perturbation Theory
• Stringent ${\sigma }_8$ constraints from small-scale galaxy clustering using a hybrid MCMC+emulator framework
• Going Beyond the Galaxy Power Spectrum: an Analysis of BOSS Data with Wavelet Scattering Transforms
• The Aemulus Project V: Cosmological constraint from small-scale clustering of BOSS galaxies
• The Bacco Simulation Project: Bacco Hybrid Lagrangian Bias Expansion Model in Redshift Space
• Accurate predictions from small boxes: variance suppression via the Zel'dovich approximation
• The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the growth rate of structure from the small-scale clustering of the luminous red galaxy sample
• The MillenniumTNG Project: Inferring cosmology from galaxy clustering with accelerated N-body scaling and subhalo abundance matching
• Diffstar: A Fully Parametric Physical Model for Galaxy Assembly History
• Evidence of Galaxy Assembly Bias in SDSS DR7 Galaxy Samples from Count Statistics
• The Aemulus Project VI: Emulation of beyond-standard galaxy clustering statistics to improve cosmological constraints
• Modeling Redshift-Space Clustering with Abundance Matching
• RSD measurements from BOSS galaxy power spectrum using the halo perturbation theory model
• Full forward model of galaxy clustering statistics with AbacusSummit lightcones
• Galaxy clustering from the bottom up: A Streaming Model emulator I
• Toward Accurate Modeling of Galaxy Clustering on Small Scales: Halo Model Extensions and Lingering Tension
• Phenomenological power spectrum models for H$\alpha$ emission line galaxies from the Nancy Grace Roman Space Telescope
• Testing General Relativity with Cosmological Large Scale Structure
• Galaxy Velocity Bias in Cosmological Simulations: Towards Percent-level Calibration
• The Covariance of Photometric and Spectroscopic Two-Point Statistics: Implications for Cosmological Parameter Inference
• Testing Large-Scale Structure Measurements Against Fisher Matrix Predictions