Date Published:
May 1, 2014
Abstract:
We explore the cosmological implications of the angle-averagedcorrelation function, ξ(s), and the clustering wedges,ξ
⊥(s) and ξ
∥(s), of the LOWZ andCMASS galaxy samples from Data Releases 10 and 11 of the Sloan DigitalSky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey. Ourresults show no significant evidence for a deviation from the standardΛ cold dark matter model. The combination of the information fromour clustering measurements with recent data from the cosmic microwavebackground is sufficient to constrain the curvature of the Universe toΩ
k = 0.0010 ± 0.0029, the total neutrino mass to∑m
ν < 0.23 eV (95 per cent confidence level), theeffective 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 addinginformation from Type Ia supernovae and baryon acoustic oscillationsfrom other samples. In particular, this data set combination iscompletely consistent with a time-independent dark energy equation ofstate, in which case we find w
DE = -1.024 ± 0.052. Weexplore the constraints on the growth rate of cosmic structures assumingf(z) = Ω
m(z)
γ and obtain γ =0.69 ± 0.15, consistent with the predictions of generalrelativity of γ = 0.55.
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