The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of baryon acoustic oscillations between redshift 0.8 and 2.2

Metin Ata, Falk Baumgarten, Julian Bautista, Florian Beutler, Dmitry Bizyaev, Michael R. Blanton, Jonathan A. Blazek, Adam S. Bolton, Jonathan Brinkmann, Joel R. Brownstein, Etienne Burtin, Chia Hsun Chuang, Johan Comparat, Kyle S. Dawson, Axel de la Macorra, Wei Du, Hélion du Mas des Bourboux, Daniel J. Eisenstein, Héctor Gil-Marín, Katie GrabowskiJulien Guy, Nick Hand, Shirley Ho, Timothy A. Hutchinson, Mikhail M. Ivanov, Francisco Shu Kitaura, Jean Paul Kneib, Pierre Laurent, Jean Marc Le Goff, Joseph E. McEwen, Eva Maria Mueller, Adam D. Myers, Jeffrey A. Newman, Nathalie Palanque-Delabrouille, Kaike Pan, Isabelle Pâris, Marcos Pellejero-Ibanez, Will J. Percival, Patrick Petitjean, Francisco Prada, Abhishek Prakash, Sergio A. Rodríguez-Torres, Ashley J. Ross, Graziano Rossi, Rossana Ruggeri, Ariel G. Sánchez, Siddharth Satpathy, David J. Schlegel, Donald P. Schneider, Hee Jong Seo, Anže Slosar, Alina Streblyanska, Jeremy L. Tinker, Rita Tojeiro, Mariana Vargas Magaña, M. Vivek, Yuting Wang, Christophe Yèche, Liang Yu, Pauline Zarrouk, Cheng Zhao, Gong Bo Zhao, Fangzhou Zhu

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Abstract

We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using the clustering of quasars. We consider a sample of 147 000 quasars from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) distributed over 2044 square degrees with redshifts 0.8 < z < 2.2 and measure their spherically averaged clustering in both configuration and Fourier space. Our observational data set and the 1400 simulated realizations of the data set allow us to detect a preference for BAO that is greater than 2.8σ. We determine the spherically averaged BAO distance to z = 1.52 to 3.8 per cent precision: DV (z = 1.52) = 3843 ± 147 (rd/rd,fid) Mpc. This is the first time the location of the BAO feature has been measured between redshifts 1 and 2. Our result is fully consistent with the prediction obtained by extrapolating the Planck flatΛCDMbest-fitting cosmology. All of our results are consistent with basic large-scale structure (LSS) theory, confirming quasars to be a reliable tracer of LSS, and provide a starting point for numerous cosmological tests to be performed with eBOSS quasar samples. We combine our result with previous, independent, BAO distance measurements to construct an updated BAO distance-ladder. Using these BAO data alone and marginalizing over the length of the standard ruler, we find ΩΛ > 0 at 6.6s significance when testing a ΛCDM model with free curvature.

Original languageEnglish (US)
Pages (from-to)4773-4794
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Volume473
Issue number4
DOIs
StatePublished - 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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