1. 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
- Author
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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, and Zhu, Fangzhou
- Subjects
Space Sciences ,Particle and High Energy Physics ,Astronomical Sciences ,Physical Sciences ,cosmology: observations ,dark energy ,distance scale ,large-scale structure of Universe ,astro-ph.CO ,Astronomical and Space Sciences ,Astronomy & Astrophysics ,Astronomical sciences ,Particle and high energy physics ,Space sciences - 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.
- Published
- 2018