The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: on the measurement of growth rate using galaxy correlation functions

2016/07/31 by Siddharth Satpathy, Shadab Alam, Shirley Ho +19 · 114 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Baryon #Baryon acoustic oscillations #Boss #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Physics #Planck #Redshift #Redshift survey #Redshift-space distortions #Sigma #Velocity dispersion #astro-ph.CO

paper · pdf · doi:10.1093/mnras/stx883

published in Monthly Notices of the Royal Astronomical Society 469(2), 1369-1382 (Oxford University Press) · This is one of the companion papers of the SDSS DR12 final cosmological result. Submitted to MNRAS. 15 pages, 7 figures, 2 tables. The present draft is a reviewed version submitted to MNRAS after getting reviewer's comments

arxiv created 2017/03/31 · openalex publication_date 2017/04/10 · arxiv updated 2017/05/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present a measurement of the linear growth rate of structure, f, from the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) using convolution Lagrangian perturbation theory (CLPT) with Gaussian streaming redshift space distortions (GSRSD) to model the two-point statistics of BOSS galaxies in DR12. The BOSS-DR12 data set includes 1198 006 massive galaxies spread over the redshift range 0.2 < z < 0.75. These galaxy samples are categorized in three redshift bins. Using CLPT-GSRSD in our analysis of the combined sample of the three redshift bins, we report measurements of fσ8 for the three redshift bins. We find fσ8 = 0.430 ± 0.054 at zeff = 0.38, fσ8 = 0.452 ± 0.057 at zeff = 0.51 and fσ8 = 0.457 ± 0.052 at zeff = 0.61. Our results are consistent with the predictions of Planck Λ cold dark matter-general relativity. Our constraints on the growth rates of structure in the Universe at different redshifts serve as a useful probe, which can help distinguish between a model of the Universe based on dark energy and models based on modified theories of gravity. This paper is part of a set that analyses the final galaxy clustering data set from BOSS. The measurements and likelihoods presented here are combined with others in Alam et al., to produce the final cosmological constraints from BOSS.

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• Unified galaxy power spectrum measurements from 6dFGS, BOSS, and eBOSS