期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 455, 期 4, 页码 4046-4056出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv2502
关键词
cosmological parameters - cosmology; observations - large-scale structure of Universe
资金
- Australian Research Council Centre of Excellence for All-Sky Astrophysics (CAASTRO) [CE110001020]
- Australian Research Council
- Swinburne
- Australian Governments Education Investment Fund
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- 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
The anisotropic galaxy two-point correlation function (2PCF) allows measurement of the growth of large-scale structures from the effect of peculiar velocities on the clustering pattern. We present new measurements of the auto- and cross-correlation function multipoles of 69 180 WiggleZ and 46 380 Baryon Oscillation Spectroscopic Survey CMASS galaxies sharing an overlapping volume of similar to 0.2 (h(-1) Gpc)(3). Analysing the redshift-space distortions (RSD) of galaxy two-point statistics for these two galaxy tracers, we test for systematic errors in the modelling depending on galaxy type and investigate potential improvements in cosmological constraints. We build a large number of mock galaxy catalogues to examine the limits of different RSD models in terms of fitting scales and galaxy type, and to study the covariance of the measurements when performing joint fits. For the galaxy data, fitting the monopole and quadrupole of the WiggleZ 2PCF on scales 24 < s < 80 h(-1) Mpc produces a measurement of the normalized growth rate f sigma(8)(z = 0.54) = 0.409 +/- 0.055, whereas for the CMASS galaxies we found a consistent constraint of f sigma(8)(z = 0.54) = 0.466 +/- 0.069, When combining the measurements, accounting for the correlation between the two surveys, we obtain f sigma(8)(z = 0.54) = 0.413 +/- 0.048, in agreement with the A Cold Dark Matter of structure growth and with other survey measurements.
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