The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Data Release 9 spectroscopic galaxy sample

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ID: 302945
2012
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Abstract
We present measurements of galaxy clustering from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part of the Sloan Digital Sky Survey III (SDSS-III). These use the Data Release 9 (DR9) CMASS sample, which contains 264 283 massive galaxies covering 3275 square degrees with an effective redshift z = 0.57 and redshift range 0.43 < z < 0.7. Assuming a concordance ΛCDM cosmological model, this sample covers an effective volume of 2.2 Gpc3, and represents the largest sample of the Universe ever surveyed at this density, . We measure the angle-averaged galaxy correlation function and power spectrum, including density-field reconstruction of the baryon acoustic oscillation (BAO) feature. The acoustic features are detected at a significance of 5σ in both the correlation function and power spectrum. Combining with the SDSS-II luminous red galaxy sample, the detection significance increases to 6.7σ. Fitting for the position of the acoustic features measures the distance to z = 0.57 relative to the sound horizon DV/rs = 13.67 ± 0.22 at z = 0.57. Assuming a fiducial sound horizon of 153.19 Mpc, which matches cosmic microwave background constraints, this corresponds to a distance DV (z = 0.57) = 2094 ± 34 Mpc. At 1.7 per cent, this is the most precise distance constraint ever obtained from a galaxy survey. We place this result alongside previous BAO measurements in a cosmological distance ladder and find excellent agreement with the current supernova measurements. We use these distance measurements to constrain various cosmological models, finding continuing support for a flat Universe with a cosmological constant.
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Authors Lauren Anderson, É. Aubourg, S. Bailey, Dmitry Bizyaev, Michael R. Blanton, A. Bolton, J. Brinkmann, Joel R. Brownstein, A. Burden, Antonio J. Cuesta, L. A. N. da Costa, Kyle Dawson, R. de Putter, Daniel J. Eisenstein, James E. Gunn, Hong Guo, J.–Ch. Hamilton, Paul Harding, Shirley Ho, Klaus Honscheid, Eyal Kazin, D. Kirkby, Jean‐Paul Kneib, Antoine Labatie, Craig Loomis, R. Lupton, Elena Malanushenko, Viktor Malanushenko, Rachel Mandelbaum, Marc Manera, Claudia Maraston, Cameron K. McBride, Kushal Mehta, Olga Mena, Francesco Montesano, Demitri Muna, Robert C. Nichol, Sebastián E. Nuza, Matthew D. Olmstead, D. Oravetz, Nikhil Padmanabhan, N. Palanque‐Delabrouille, Kaike Pan, John K. Parejko, Isabelle Pâris, Will J. Percival, P. Petitjean, Francisco Prada, Beth Reid, Natalie A. Roe, Ashley J. Ross, Nicholas P. Ross, Lado Samushia, Ariel G. Sánchez, David J. Schlegel, Donald P. Schneider, Claudia G. Scóccola, Hee‐Jong Seo, E. S. Sheldon, Audrey Simmons, R. Skibba, Michael A. Strauss, M. E. C. Swanson, D. Thomas, Jeremy L. Tinker, Rita Tojeiro, M. Vargas-Magaña, Licia Verde, Christian Wagner, David A. Wake, B. A. Weaver, David H. Weinberg, Martin White, Xiaoying Xu, Christophe Yèche, Idit Zehavi, Gong‐Bo Zhao
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Journal monthly notices of the royal astronomical society
Year 2012
DOI
10.1111/j.1365-2966.2012.22066.x
URL
https://academic.oup.com/mnras/article-pdf/427/4/3435/2966997/427-4-3435.pdf
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