The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: single-probe measurements and the strong power of normalized growth rate on constraining dark energy

Understand

We present measurements of the anisotropic galaxy clustering from the Data Release 9 (DR9) CMASS sample of the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS).

• We analyze 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 $\Omega_m h^2$, and the biased amplitude of matter fluctuation b\sigma_8(z).
• We obtain {$H(0.57)$, $D_A(0.57)$, $f(0.57)\sigma_8(0.57)$, $\Omega_m h^2$, $b\sigma_8(0.57)$} = {$87.6_{-6.8}^{+6.7}$, $1396\pm73$, $0.126_{-0.010}^{+0.008}$, $1.19\pm0.14$, $0.428\pm0.066$} and their covariance matrix as well.
• The parameters which are not well constrained by our of galaxy clustering analysis are marginalized over with wide flat priors.