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

Publication date: 
Main author: 
Ata, Metin
IAA authors: 
Prada, Francisco
Ata, Metin;Baumgarten, Falk;Bautista, Julian;Beutler, Florian;Bizyaev, Dmitry;Blanton, Michael R.;Blazek, Jonathan A.;Bolton, Adam S.;Brinkmann, Jonathan;Brownstein, Joel R.;Burtin, Etienne;Chuang, Chia-Hsun;Comparat, Johan;Dawson, Kyle S.;de la Macorra, Axel;Du, Wei;du Mas des Bourboux, Hélion;Eisenstein, Daniel J.;Gil-Marín, Héctor;Grabowski, Katie;Guy, Julien;Hand, Nick;Ho, Shirley;Hutchinson, Timothy A.;Ivanov, Mikhail M.;Kitaura, Francisco-Shu;Kneib, Jean-Paul;Laurent, Pierre;Le Goff, Jean-Marc;McEwen, Joseph E.;Mueller, Eva-Maria;Myers, Adam D.;Newman, Jeffrey A.;Palanque-Delabrouille, Nathalie;Pan, Kaike;Pâris, Isabelle;Pellejero-Ibanez, Marcos;Percival, Will J.;Petitjean, Patrick;Prada, Francisco;Prakash, Abhishek;Rodríguez-Torres, Sergio A.;Ross, Ashley J.;Rossi, Graziano;Ruggeri, Rossana;Sánchez, Ariel G.;Satpathy, Siddharth;Schlegel, David J.;Schneider, Donald P.;Seo, Hee-Jong;Slosar, Anže;Streblyanska, Alina;Tinker, Jeremy L.;Tojeiro, Rita;Vargas Magaña, Mariana;Vivek, M.;Wang, Yuting;Yèche, Christophe;Yu, Liang;Zarrouk, Pauline;Zhao, Cheng;Zhao, Gong-Bo;Zhu, Fangzhou
Monthly Notices of the Royal Astronomical Society
Publication type: 
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: D<SUB>V</SUB>(z = 1.52) = 3843 ± 147(r<SUB>d</SUB>/r<SUB>d, fid</SUB>)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 flat ΛCDM best-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 Ω<SUB>Λ</SUB> > 0 at 6.6σ significance when testing a ΛCDM model with free curvature.
ADS Bibcode: 
cosmology: observations;dark energy;distance scale;large-scale structure of Universe;Astrophysics - Cosmology and Nongalactic Astrophysics