The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Data Releases 10 and 11 Galaxy samples

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ID: 291266
2014
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Abstract
We present a one per cent measurement of the cosmic distance scale from the detections of the baryon acoustic oscillations (BAO) in the clustering of galaxies from the Baryon Oscillation Spectroscopic Survey, which is part of the Sloan Digital Sky Survey III. Our results come from the Data Release 11 (DR11) sample, containing nearly one million galaxies and covering approximately 8500 square degrees and the redshift range 0.2 < |$z$| < 0.7. We also compare these results with those from the publicly released DR9 and DR10 samples. Assuming a concordance Λ cold dark matter (ΛCDM) cosmological model, the DR11 sample covers a volume of 13 Gpc3 and is the largest region of the Universe ever surveyed at this density. We measure the correlation function and power spectrum, including density-field reconstruction of the BAO feature. The acoustic features are detected at a significance of over 7σ in both the correlation function and power spectrum. Fitting for the position of the acoustic features measures the distance relative to the sound horizon at the drag epoch, rd, which has a value of rd,fid = 149.28 Mpc in our fiducial cosmology. We find DV = (1264 ± 25 Mpc)(rd/rd,fid) at |$z$| = 0.32 and DV = (2056 ± 20 Mpc)(rd/rd,fid) at |$z$| = 0.57. At 1.0 per cent, this latter measure is the most precise distance constraint ever obtained from a galaxy survey. Separating the clustering along and transverse to the line of sight yields measurements at |$z$| = 0.57 of DA = (1421 ± 20 Mpc)(rd/rd,fid) and H = (96.8 ± 3.4 km s−1 Mpc−1)(rd,fid/rd). Our measurements of the distance scale are in good agreement with previous BAO measurements and with the predictions from cosmic microwave background data for a spatially flat CDM model with a cosmological constant.
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Authors Lauren Anderson, Éric Aubourg, S. Bailey, Florian Beutler, Vaishali Bhardwaj, Michael R. Blanton, A. Bolton, J. Brinkmann, Joel R. Brownstein, A. Burden, Chia-Hsun Chuang, Antonio J. Cuesta, Kyle Dawson, Daniel J. Eisenstein, S. Escoffier, James E. Gunn, Hong Guo, Shirley Ho, Klaus Honscheid, Cullan Howlett, D. Kirkby, Robert H. Lupton, Marc Manera, Claudia Maraston, Cameron K. McBride, Olga Mena, Francesco Montesano, Robert C. Nichol, Sebastián E. Nuza, Matthew D. Olmstead, Nikhil Padmanabhan, N. Palanque‐Delabrouille, John K. Parejko, W. J. Percival, Patrick Petitjean, Francisco Prada, Adrian M. Price-Whelan, Beth Reid, Natalie A. Roe, Ashley J. Ross, Nicholas P. Ross, Cristiano G. Sabiu, Shun Saito, Lado Samushia, Ariel G. Sánchez, David J. Schlegel, Donald P. Schneider, Claudia G. Scóccola, Hee‐Jong Seo, Ramin Skibba, Michael A. Strauss, Molly E. C. Swanson, D. Thomas, Jeremy L. Tinker, Rita Tojeiro, M. Vargas-Magaña, Licia Verde, David A. Wake, Benjamin A. Weaver, David H. Weinberg, Martin White, Xiaoying Xu, Christophe Yèche, Idit Zehavi, Gong‐Bo Zhao
Journal monthly notices of the royal astronomical society
Year 2014
DOI
10.1093/mnras/stu523
URL
https://academic.oup.com/mnras/article-pdf/441/1/24/3007885/stu523.pdf
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