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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measuring DA and H at z = 0.57 from the baryon acoustic peak in the Data Release 9 spectroscopic Galaxy sample

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Author(s)

Lauren Anderson, Eric Aubourg, Stephen Bailey, Florian Beutler, Adam S. Bolton, J. Brinkmann, Joel R. Brownstein, Chia-Hsun Chuang, Antonio J. Cuesta, Kyle S. Dawson, Daniel J. Eisenstein, Shirley Ho, Klaus Honscheid, Eyal A. Kazin, David Kirkby, Marc Manera, Cameron K. McBride, O. Mena, Robert C. Nichol, Matthew D. Olmstead & 20 more Nikhil Padmanabhan, N. Palanque-Delabrouille, Will J. Percival, Francisco Prada, Ashley J. Ross, Nicholas P. Ross, Ariel G. Sánchez, Lado Samushia, David J. Schlegel, Donald P. Schneider, Hee-Jong Seo, Michael A. Strauss, Daniel Thomas, Jeremy L. Tinker, Rita Tojeiro, Licia Verde, David Wake, David H. Weinberg, Xiaoying Xu, Christophe Yeche

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Abstract

We present measurements of the angular diameter distance to and Hubble parameter at z = 0.57 from the measurement of the baryon acoustic peak in the correlation of galaxies from the Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey. Our analysis is based on a sample from Data Release 9 of 264 283 galaxies over 3275 square degrees in the redshift range 0.43 < z < 0.70. We use two different methods to provide robust measurement of the acoustic peak position across and along the line of sight in order to measure the cosmological distance scale. We find DA(0.57) = 1408 ± 45 Mpc and H(0.57) = 92.9 ± 7.8 km s−1 Mpc−1 for our fiducial value of the sound horizon. These results from the anisotropic fitting are fully consistent with the analysis of the spherically averaged acoustic peak position presented in Anderson et al. Our distance measurements are a close match to the predictions of the standard cosmological model featuring a cosmological constant and zero spatial curvature.

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Original languageEnglish
Pages (from-to)83-101
JournalMonthly Notices of the Royal Astronomical Society
Volume439
Issue number1
Early online date30 Jan 2014
DOIs
Publication statusPublished - 21 Mar 2014

    Research areas

  • Cosmological parameters, Cosmology: observations, Dark energy, Distance scale, Large scale structure of Universe

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