## Abstract

^{3}, and represents the largest sample of the Universe ever surveyed at this density, ¯n ≈ 3 × 10

^{−4}h

^{ −3}Mpc

^{3}. We measure the angle-averaged galaxy correlation function and power spectrum, including density-field reconstruction of the baryon acoustic oscillation (BAO) feature. The acoustic features are detected at a significance of 5σ in both the correlation function and power spectrum. Combining with the SDSS-II luminous red galaxy sample, the detection significance increases to 6.7σ. Fitting for the position of the acoustic features measures the distance to z = 0.57 relative to the sound horizon D

_{V}/r

_{s}= 13.67 ± 0.22 at z = 0.57. Assuming a fiducial sound horizon of 153.19 Mpc, which matches cosmic microwave background constraints, this corresponds to a distance D

_{V}(z = 0.57) = 2094 ± 34 Mpc. At 1.7 per cent, this is the most precise distance constraint ever obtained from a galaxy survey. We place this result alongside previous BAO measurements in a cosmological distance ladder and find excellent agreement with the current supernova measurements.We use these distance measurements to constrain various cosmological models, finding continuing support for a flat Universe with a cosmological constant.

Original language | English |
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Pages (from-to) | 3435-3467 |

Journal | Monthly Notices of the Royal Astronomical Society |

Volume | 427 |

Issue number | 4 |

DOIs | |

Publication status | Published - 2012 |