期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 433, 期 4, 页码 3559-3571出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt988
关键词
cosmological parameters; cosmology: observations; distance scale; large-scale structure of Universe
资金
- Spanish MICINN [MultiDarkCSD2009-00064, AYA201021231- C02-01]
- Comunidad de Madrid [HEPHACOS S2009/ESP-1473]
- NASA Office of Space Science
- ICG
- SEPNet
- University of Portsmouth
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- University of Arizona
- Brookhaven National Laboratory
- University of Cambridge
- Carnegie Mellon University
- University of Florida
- Harvard University
- Instituto de Astrofisica de Canarias
- 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
- Princeton University
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- STFC [ST/K00090X/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K00090X/1] Funding Source: researchfish
We present measurements of the anisotropic galaxy clustering from the Data Release 9 (DR9) CMASS sample of the Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic Survey (BOSS). We analyse the broad-range shape of the monopole and quadrupole correlation functions to obtain constraints, at the effective redshift z = 0.57 of the sample, on the Hubble expansion rate H(z), the angular-diameter distance D-A(z), the normalized growth rate f (z)Sigma(8)(z), the physical matter density (m)h(2), and the biased amplitude of matter fluctuation b Sigma(8)(z). We obtain H(0.57), D-A(0.57), f (0.57)Sigma(8)(0.57), (m)h(2), b Sigma(8)(0.57) = 87.6_-6.8 boolean AND+6.7 kms(-1) Mpc(-1), 1396 +/- 73 Mpc, 0.428 +/- 0.066,0.126_-0.010+0.008, 1.19 +/- 0.14} and their covariance matrix as well. 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 [i.e. 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. We show that the major power on constraining dark energy from the anisotropic galaxy clustering signal, as compared to the angular-averaged one (monopole), arises from including the normalized growth rate f (z)Sigma(8)(z). In the case of the cosmological model assuming a constant dark energy equation of state and a flat universe (wCDM), our single-probe CMASS constraints, combined with CMB (WMAP9+SPT), yield a value for the dark energy equation-of-state parameter of w = -0.90 +/- 0.11. Therefore, it is important to include f (z)Sigma(8)(z) while investigating the nature of dark energy with current and upcoming large-scale galaxy surveys.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据