Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 443, Issue 4, Pages 2950-2956Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu1374
Keywords
cosmology: observations; distance scale; large-scale structure of Universe
Categories
Funding
- DOE [DE-SC0009956]
- NASA [12-EUCLID12-0004]
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
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We analyse the anisotropic two-dimensional galaxy correlation function (2DCF) of the CMASS galaxy samples from the Sloan Digital Sky Survey Data Release 9 of the Baryon Oscillation Spectroscopic Survey data. Modelling the 2DCF fully including non-linear effects and redshift space distortions (RSD) in the scale range of 30-120 h(-1) Mpc, we find H(0.57)r(s)(z(d))/c = 0.0444 +/- 0.0019, D-A(0.57)/r(s)(z(d)) = 9.01 +/- 0.23, and f(g)(0.57)sigma(8)(0.57) = 0.474 +/- 0.075, where r(s)(z(d)) is the sound horizon at the drag epoch computed using a simple integral, f(g)(z) is the growth rate at redshift z, and sigma(8)(z) represents the matter power spectrum normalization on 8 h(-1) Mpc scale at z. We find that the scales larger than 120 h(-1) Mpc are dominated by noise in the 2DCF analysis, and that the inclusion of scales 30-40 h(-1) Mpc significantly tightens the RSD measurement. Our measurements are consistent with previous results using the same data, but have significantly better precision since we are using all the information from the 2DCF in the scale range of 30-120 h(-1) Mpc. Our measurements have been marginalized over sufficiently wide priors for the relevant parameters; they can be combined with other data to probe dark energy and gravity.
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