期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 439, 期 4, 页码 3504-3519出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu197
关键词
gravitation; cosmological parameters; dark energy; dark matter; distance scale; large-scale structure of Universe
资金
- European Research Council
- NASA through Hubble Fellowship [51280]
- Space Telescope Science Institute
- NASA [NAS 5-26555]
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- University of Cambridge
- 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
- STFC [ST/K00090X/1, ST/J001511/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K00090X/1] Funding Source: researchfish
- UK Space Agency [ST/K00283X/1] Funding Source: researchfish
We use the observed anisotropic clustering of galaxies in the Baryon Oscillation Spectroscopic Survey Data Release 11 CMASS sample to measure the linear growth rate of structure, the Hubble expansion rate and the comoving distance scale. Our sample covers 8498 deg(2) and encloses an effective volume of 6 Gpc(3) at an effective redshift of (z) over bar = 0.57. We find f Sigma(8) = 0.441 +/- 0.044, H = 93.1 +/- 3.0 km s(-1) Mpc(-1) and D-A = 1380 +/- 23 Mpc when fitting the growth and expansion rate simultaneously. When we fix the background expansion to the one predicted by spatially flat Lambda cold dark matter (Lambda CDM) model in agreement with recent Planck results, we find f Sigma(8) = 0.447 +/- 0.028 (6 per cent accuracy). While our measurements are generally consistent with the predictions of Lambda CDM and general relativity, they mildly favour models in which the strength of gravitational interactions is weaker than what is predicted by general relativity. Combining our measurements with recent cosmic microwave background data results in tight constraints on basic cosmological parameters and deviations from the standard cosmological model. Separately varying these parameters, we find w = -0.983 +/- 0.075 (8 per cent accuracy) and gamma = 0.69 +/- 0.11 (16 per cent accuracy) for the effective equation of state of dark energy and the growth rate index, respectively. Both constraints are in good agreement with the standard model values of w = -1 and gamma = 0.554.
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