期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 461, 期 4, 页码 3781-3793出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw1535
关键词
cosmological parameters; cosmology: observations; distance scale; large-scale structure of Universe
资金
- Spanish MICINN's Consolider-Ingenio Programme [CSD2009-00064, AYA2010-21231-C02-01]
- Comunidad de Madrid [HEPHACOS S2009/ESP-1473]
- MINECO [AYA2012-39702-C02-01]
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. 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
- Science and Technology Facilities Council [ST/N000668/1, ST/K00090X/1] Funding Source: researchfish
- STFC [ST/N000668/1, ST/K00090X/1] Funding Source: UKRI
With the largest spectroscopic galaxy survey volume drawn from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS), we can extract cosmological constraints from the measurements of redshift and geometric distortions at quasi-linear scales (e.g. above 50 h(-1) Mpc). We analyse the broad-range shape of the monopole and quadrupole correlation functions of the BOSS Data Release 12 (DR12) CMASS galaxy sample, at the effective redshift z = 0.59, to obtain constraints on the Hubble expansion rate H(z), the angular-diameter distance D-A(z), the normalized growth rate f(z)sigma(8)(z), and the physical matter density Omega(m)h(2). We obtain robust measurements by including a polynomial as the model for the systematic errors, and find it works very well against the systematic effects, e.g. ones induced by stars and seeing. We provide accurate measurements {D-A(0.59)r(s,fid)/r(s), H(0.59)r(s)/r(s, fid), f(0.59)sigma(8)(0.59), Omega(m)h(2)} = {1427 +/- 26 Mpc, 97.3 +/- 3.3 km s(-1) Mpc(-1), 0.488 +/- 0.060, 0.135 +/- 0.016}, where r(s) is the comoving sound horizon at the drag epoch and r(s, fid) = 147.66 Mpc is the sound scale of the fiducial cosmology used in this study. The parameters which are not well constrained by our galaxy clustering analysis are marginalized over with wide flat priors. Since no priors from other data sets, e.g. cosmic microwave background (CMB), are adopted and no dark energy models are assumed, our results from BOSS CMASS galaxy clustering alone may be combined with other data sets, i. e. CMB, SNe, lensing or other galaxy clustering data to constrain the parameters of a given cosmological model. The uncertainty on the dark energy equation of state parameter, w, from CMB+CMASS is about 8 per cent. The uncertainty on the curvature fraction, Omega(k), is 0.3 per cent. We do not find deviation from flat Lambda CDM.
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