The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR16 luminous red galaxy and emission line galaxy samples: cosmic distance and structure growth measurements using multiple tracers in configuration space

Yuting Wang, Gong-Bo Zhao, Cheng Zhao, Oliver H. E. Philcox, Shadab Alam, Amélie Tamone, Arnaud de Mattia, Ashley J. Ross, Anand Raichoor, Etienne Burtin, Romain Paviot, Sylvain de la Torre, Will J. Percival, Kyle S. Dawson, Héctor Gil-Marín, Julian E. Bautista, Jiamin Hou, Kazuya Koyama, John A. Peacock, Vanina Ruhlmann-KleiderHélion du Mas des Bourboux, Johan Comparat, Stephanie Escoffier, Eva-Maria Mueller, Jeffrey A. Newman, Graziano Rossi, Arman Shafieloo, Donald P. Schneider

Research output: Contribution to journalArticlepeer-review

Abstract

We perform a multi-tracer analysis using the complete Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 luminous red galaxy (LRG) and the DR16 emission line galaxy (ELG) samples in the configuration space, and successfully detect a cross correlation between the two samples, and find the growth rate to be fσ8=0.342±0.085 (∼25 per cent accuracy) from the cross sample alone. We perform a joint measurement of the baryonic acoustic oscillation (BAO) and redshift space distortion (RSD) parameters at a single effective redshift of zeff=0.77, using the auto- and cross-correlation functions of the LRG and ELG samples, and find that the comoving angular diameter distance DM(zeff)/rd=18.93±0.37, the Hubble distance DH(zeff)/rd=19.65±0.54, and fσ8(zeff)=0.445±0.038, which is consistent with a ΛCDM model at 68% CL. Compared to the single-tracer analysis on the LRG sample, the Figure of Merit (FoM) of α⊥,α|| and fσ8 is improved by a factor of 1.18 in our multi-tracer analysis, and in particular, the statistical uncertainty of fσ8 is reduced by 11.6%.
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Publication statusAccepted for publication - 21 Aug 2020

Keywords

  • astro-ph.CO

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