Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 443, Issue 2, Pages 1065-1089Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu1051
Keywords
gravitation; surveys; cosmological parameters; cosmology: observations; dark energy; large-scale structure of Universe
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [25887012]
- Alfred P. Sloan Foundation
- 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
- National Science Foundation
- U.S. Department of Energy Office of Science
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- Grants-in-Aid for Scientific Research [25887012] Funding Source: KAKEN
- Science and Technology Facilities Council [ST/K00090X/1] Funding Source: researchfish
- STFC [ST/K00090X/1] Funding Source: UKRI
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We analyse the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS Data Release 11 (DR11) sample, which consists of 690 827 galaxies in the redshift range 0.43 < z < 0.7 and has a sky coverage of 8498 deg(2). We perform our analysis in Fourier space using a power spectrum estimator suggested by Yamamoto et al. We measure the multipole power spectra in a self-consistent manner for the first time in the sense that we provide a proper way to treat the survey window function and the integral constraint, without the commonly used assumption of an isotropic power spectrum and without the need to split the survey into subregions. The main cosmological signals exploited in our analysis are the baryon acoustic oscillations and the signal of redshift space distortions, both of which are distorted by the Alcock-Paczynski effect. Together, these signals allow us to constrain the distance ratio D-V(z(eff))/r(s)(z(d)) = 13.89 +/- 0.18, the Alcock-Paczynski parameter F-AP(z(eff)) = 0.679 +/- 0.031 and the growth rate of structure f (z(eff))sigma(8)(z(eff)) = 0.419 +/- 0.044 at the effective redshift z(eff) = 0.57. We emphasize that our constraints are robust against possible systematic uncertainties. In order to ensure this, we perform a detailed systematics study against CMASS mock galaxy catalogues and N-body simulations. We find that such systematics will lead to 3.1 per cent uncertainty for f sigma(8) if we limit our fitting range to k = 0.01-0.20 h Mpc(-1), where the statistical uncertainty is expected to be three times larger. We did not find significant systematic uncertainties for D-V/r(s) or FAP. Combining our data set with Planck to test General Relativity (GR) through the simple gamma-parametrization, where the growth rate is given by f (z) = Omega(gamma)(m)(z), reveals a similar to 2 sigma tension between the data and the prediction by GR. The tension between our result and GR can be traced back to a tension in the clustering amplitude sigma(8) between CMASS and Planck.
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