2013/12/17 by Ariel G. Sanchez, Francesco Montesano, Eyal A. Kazin +25 · 1 citation
Physics and Astronomy · #astro-ph.CO
paper · pdf · doi:10.1093/mnras/stu342
24 pages, 14 figures. Submitted to MNRAS. Measurements and covariance matrices are available at https://sdss3.org/science/boss_publications.php
arxiv created 2013/12/17 · arxiv updated 2015/06/18
We explore the cosmological implications of the angle-averaged correlation function, xi(s), and the clustering wedges, xiperp(s) and xipara(s), of the LOWZ and CMASS galaxy samples from Data Release 10 and 11 of the SDSS-III Baryon Oscillation Spectroscopic Survey. Our results show no significant evidence for a deviation from the standard LCDM 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 Omegak = 0.0010 +- 0.0029, the total neutrino mass to Sum mnu < 0.23 eV (95% confidence level), the effective number of relativistic species to Neff=3.31 +- 0.27, and the dark energy equation of state to wDE = -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 time-independent dark energy equation of state, in which case we find wDE=-1.024 +- 0.052. We explore the constraints on the growth-rate of cosmic structures assuming f(z)=Omegam(z)gamma and obtain gamma=0.69 +- 0.15, in agreement with the predictions from general relativity of gamma=0.55.