The clustering of galaxies in the SDSSIII Baryon Oscillation Spectroscopic Survey: cosmological implications of the full shape of the clustering wedges in the data release 10 and 11 galaxy samples
Abstract
We explore the cosmological implications of the angleaveraged correlation function, ξ(s), and the clustering wedges, ξ_{⊥}(s) and ξ_{∥}(s), of the LOWZ and CMASS galaxy samples from Data Releases 10 and 11 of the Sloan Digital Sky Survey III (SDSSIII) Baryon Oscillation Spectroscopic Survey. Our results show no significant evidence for a deviation from the standard Λ cold dark matter model. The combination of the information from our clustering measurements with recent data from the cosmic microwave background is sufficient to constrain the curvature of the Universe to Ω_{k} = 0.0010 ± 0.0029, the total neutrino mass to ∑m_{ν} < 0.23 eV (95 per cent confidence level), the effective number of relativistic species to N_{eff} = 3.31 ± 0.27 and the dark energy equation of state to w_{DE} = 1.051 ± 0.076. These limits are further improved by adding information from Type Ia supernovae and baryon acoustic oscillations from other samples. In particular, this data set combination is completely consistent with a timeindependent dark energy equation of state, in which case we find w_{DE} = 1.024 ± 0.052. We explore the constraints on the growth rate of cosmic structures assuming f(z) = Ω_{m}(z)^{γ} and obtain γ = 0.69 ± 0.15, consistent with the predictions of general relativity of γ = 0.55.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 May 2014
 DOI:
 10.1093/mnras/stu342
 arXiv:
 arXiv:1312.4854
 Bibcode:
 2014MNRAS.440.2692S
 Keywords:

 cosmological parameters;
 largescale structure of Universe;
 Astrophysics  Cosmology and Nongalactic Astrophysics
 EPrint:
 24 pages, 14 figures. Submitted to MNRAS. Measurements and covariance matrices are available at https://sdss3.org/science/boss_publications.php