- Main
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
- 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;
- Magaña, Mariana Vargas;
- Vivek, M;
- Wang, Yuting;
- Yèche, Christophe;
- Yu, Liang;
- Zarrouk, Pauline;
- Zhao, Cheng;
- Zhao, Gong-Bo;
- Zhu, Fangzhou
- et al.
Published Web Location
https://doi.org/10.1093/mnras/stx2630Abstract
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.
Main Content
Enter the password to open this PDF file:
-
-
-
-
-
-
-
-
-
-
-
-
-
-