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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

Research output: Contribution to journalArticlepeer-review

Author(s)

Julian E Bautista, Romain Paviot, Mariana Vargas Magaña, Sylvain de la Torre, Sebastien Fromenteau, Hector Gil-Marín, Ashley J Ross, Etienne Burtin, Kyle S Dawson, Jiamin Hou, Jean-Paul Kneib, Arnaud de Mattia, Will J Percival, Graziano Rossi, Rita Tojeiro, Cheng Zhao, Gong-Bo Zhao, Shadab Alam, Joel Brownstein, Michael J Chapman & 13 more Peter D Choi, Chia-Hsun Chuang, Stéphanie Escoffier, Axel de la Macorra, Hélion du Mas des Bourboux, Faizan G Mohammad, Jeongin Moon, Eva-Maria Müller, Seshadri Nadathur, Jeffrey A Newman, Donald Schneider, Hee-Jong Seo, Yuting Wang

School/Research organisations

Abstract

We present the cosmological analysis of the configuration-space anisotropic clustering in the completed Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 galaxy sample. This sample consists of luminous red galaxies (LRGs) spanning the redshift range 0.6 < z < 1, at an effective redshift of zeff = 0.698. It combines 174 816 eBOSS LRGs and 202 642 BOSS CMASS galaxies. We extract and model the baryon acoustic oscillations (BAO) and redshift-space distortions (RSD) features from the galaxy two-point correlation function to infer geometrical and dynamical cosmological constraints. The adopted methodology is extensively tested on a set of realistic simulations. The correlations between the inferred parameters from the BAO and full-shape correlation function analyses are estimated. This allows us to derive joint constraints on the three cosmological parameter combinations: DM(z)/rdDH(z)/rd and fσ8(z), where DM is the comoving angular diameter distance, DH is Hubble distance, rd is the comoving BAO scale, f is the linear growth rate of structure, and σ8 is the amplitude of linear matter perturbations. After combining the results with those from the parallel power spectrum analysis of Gil-Marin et al. 2020, we obtain the constraints: DM/rd = 17.65 ± 0.30, DH/rd = 19.77 ± 0.47, fσ8 = 0.473 ± 0.044. These measurements are consistent with a flat ΛCDM model with standard gravity.
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Original languageEnglish
Pages (from-to)736–762
JournalMonthly Notices of the Royal Astronomical Society
Volume500
Issue number1
Early online date17 Sep 2020
DOIs
Publication statusPublished - Jan 2021

    Research areas

  • Cosmology: dark energy, Cosmology: large-scale structure of Universe, Cosmology: observations

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