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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

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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, Helion du Mas des Bourboux, Jack Elvin-Poole, Violeta Gonzalez-Perez, Claudio Gorgoni, Jean-Paul Kneib & 20 more Hui Kong, Dustin Lang, John Moustakas, Adam D. Myers, Eva-Maria Mueller, Seshadri Nadathur, Jeffrey A. Newman, Will J. Percival, Mehdi Rezaie, Graziano Rossi, Vanina Ruhlmann-Kleider, David J. Schlegel, Donald P. Schneider, Hee-Jong Seo, Amelie Tamone, Jeremy L. Tinker, Rita Tojeiro, M. Vivek, Christophe Yeche, Gong-Bo Zhao

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Abstract

We present the Emission Line Galaxy (ELG) sample of the extended Baryon Oscillation Spectroscopic Survey from the Sloan Digital Sky Survey IV Data Release 16. We describe the observations and redshift measurement for the 269 243 observed ELG spectra, and then present the large-scale structure catalogues, used for the cosmological analysis, and made of 173 736 reliable spectroscopic redshifts between 0.6 and 1.1. We perform a spherically averaged baryon acoustic oscillations (BAO) measurement in configuration space, with density field reconstruction: the data two-point correlation function shows a feature consistent with that of the BAO, the BAO model being only weakly preferred over a model without BAO (Delta chi(2) <1). Fitting a model constrained to have a BAO feature provides a 3.2 per cent measurement of the spherically averaged BAO distance D-V(z(eff))/r(drag) = 18.23 +/- 0.58 at the effective redshift z(eff) = 0.845.

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Original languageEnglish
Article numberstaa3336
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 - Jan 2021

    Research areas

  • Galaxies: distances and redshifts, Dark energy, Distance scale, Large-scale structure of Universe, Cosmology: observations

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