The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the correlation function of LOWZ and CMASS galaxies in Data Release 12

Collaboration
Sep 21, 2015
16 pages
Published in:
  • Mon.Not.Roy.Astron.Soc. 457 (2016) 2, 1770-1785
  • Published: Apr 1, 2016
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Abstract: (Oxford University Press)
We present distance scale measurements from the baryon acoustic oscillation signal in the constant stellar mass and low-redshift sample samples from the Data Release 12 of the Baryon Oscillation Spectroscopic Survey. The total volume probed is 14.5 Gpc^3, a 10 per cent increment from Data Release 11. From an analysis of the spherically averaged correlation function, we infer a distance to z = 0.57 of DV(z)rdfid/rd=2028±21D_V(z)r^{\rm fid}_{\rm d}/r_{\rm d} = 2028\pm 21 Mpc and a distance to z = 0.32 of DV(z)rdfid/rd=1264±22D_V(z)r^{\rm fid}_{\rm d}/r_{\rm d} = 1264\pm 22 Mpc assuming a cosmology in which rdfid=147.10r^{\rm fid}_{\rm d} = 147.10 Mpc. From the anisotropic analysis, we find an angular diameter distance to z = 0.57 of DA(z)rdfid/rd=1401±21D_{\rm A}(z)r^{\rm fid}_{\rm d}/r_{\rm d} = 1401\pm 21 Mpc and a distance to z = 0.32 of 981 ± 20 Mpc, a 1.5 and 2.0 per cent measurement, respectively. The Hubble parameter at z = 0.57 is H(z)rd/rdfid=100.3±3.7H(z)r_{\rm d}/r^{\rm fid}_{\rm d} = 100.3\pm 3.7 km s^−1 Mpc^−1 and its value at z = 0.32 is 79.2 ± 5.6 km s^−1 Mpc^−1, a 3.7 and 7.1 per cent measurement, respectively. These cosmic distance scale constraints are in excellent agreement with a Λ cold dark matter model with cosmological parameters released by the recent Planck 2015 results.
Note:
  • 18 pages, 10 figures, 13 tables. Matches version accepted for publication in MNRAS. Here we account for a systematic error budget not included in the previous version of this manuscript
  • cosmology: observations
  • distance scale
  • large-scale structure of Universe