The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: large-scale structure catalogues and measurement of the isotropic BAO between redshift 0.6 and 1.1 for the Emission Line Galaxy sample

Anand Raichoor, Arnaud de Mattia, Ashley J. Ross, Cheng Zhao, Shadab Alam, Santiago Avila, Julian Bautista, Jonathan Brinkmann, Joel R. Brownstein, Etienne Burtin, Michael J. Chapman, Chia-Hsun Chuang, Johan Comparat, Kyle S. Dawson, Arjun Dey, Hélion du Mas des Bourboux, Jack Elvin-Poole, Violeta Gonzalez-Perez, Claudio Gorgoni, Jean-Paul KneibHui Kong, Dustin Lang, John Moustakas, Adam D. Myers, Eva-Maria Müller, Seshadri Nadathur, Jeffrey A. Newman, Will J. Percival, Mehdi Rezaie, Graziano Rossi, Vanina Ruhlmann-Kleider, David J. Schlegel, Donald P. Schneider, Hee-Jong Seo, Amélie Tamone, Jeremy L. Tinker, Rita Tojeiro, M. Vivek, Christophe Yèche, Gong-Bo Zhao

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Abstract

We present the Emission Line Galaxy (ELG) sample of the extended Baryon Oscillation Spectroscopic Survey (eBOSS) from the Sloan Digital Sky Survey IV Data Release 16 (DR16). After describing the observations and redshift measurement for the 269,243 observed ELG spectra over 1170 deg2, we present the large-scale structure catalogues, which are used for the cosmological analysis. These catalogues contain 173,736 reliable spectroscopic redshifts between 0.6 and 1.1, along with the associated random catalogues quantifying the extent of observations, and the appropriate weights to correct for non-cosmological fluctuations. We perform a spherically averaged baryon acoustic oscillations (BAO) measurement in configuration space, with density field reconstruction: the data 2-point correlation function shows a feature consistent with that of the BAO, but the BAO model is only weakly preferred over a model without BAO (ΔΧ2 < 1). Fitting a model constrained to have a BAO feature provides a 3.2-percent measurement of the spherically averaged BAO distance DV  (zeff) / rdrag = 18.23 ± 0.58 at the effective redshift zeff = 0.845.
Original languageEnglish
Pages (from-to)3254-3274
Number of pages21
JournalMonthly Notices of the Royal Astronomical Society
Volume500
Issue number3
Early online date28 Oct 2020
DOIs
Publication statusPublished - 1 Jan 2021

Keywords

  • astro-ph.CO
  • RCUK
  • STFC
  • cosmology: observations
  • cosmology: dark energy
  • cosmology: distance scale
  • cosmology: large-scale structure of Universe
  • galaxies: distances and redshifts

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