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, S. Àvila, Julian Bautista, J. Brinkmann, Joel R. Brownstein, E. Burtin, Michael J. Chapman, Chia-Hsun Chuang, Johan Comparat, Kyle Dawson, Arjun Dey, Hélion du Mas des Bourboux, J. Elvin-Poole, Violeta González-Pérez, Claudio Gorgoni, Jean‐Paul Kneib, Hui Kong, Dustin Lang, John Moustakas, Adam D. Myers, Eva-Maria Müller, S. Nadathur, Jeffrey A. Newman, Will J. Percival, Mehdi Rezaie, Graziano Rossi, V. 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
Abstract
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 (Δχ2 < 1). Fitting a model constrained to have a BAO feature provides a 3.2 per cent measurement of the spherically averaged BAO distance DV(zeff)/rdrag = 18.23 ± 0.58 at the effective redshift zeff = 0.845.