Detection of baryon acoustic oscillation features in the large-scale three-point correlation function of SDSS BOSS DR12 CMASS galaxies

Zachary Slepian, Daniel J. Eisenstein, Joel R. Brownstein, Chia-Hsun Chuang, Héctor Gil-Marín, Shirley Ho, Francisco-Shu Kitaura, Will J. Percival, Ashley J. Ross, Graziano Rossi, Hee-Jong Seo, Anže Slosar, Mariana Vargas-Magaña

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Abstract

We present the large-scale three-point correlation function (3PCF) of the Sloan Digital Sky Survey DR12 Constant stellar Mass (CMASS) sample of 777 202 Luminous Red Galaxies, the largest-ever sample used for a 3PCF or bispectrum measurement. We make the first high-significance (4.5σ) detection of baryon acoustic oscillations (BAO) in the 3PCF. Using these acoustic features in the 3PCF as a standard ruler, we measure the distance to z = 0.57 to 1.7 per cent precision (statistical plus systematic). We find DV = 2024 ± 29 Mpc (stat) ± 20 Mpc (sys) for our fiducial cosmology (consistent with Planck 2015) and bias model. This measurement extends the use of the BAO technique from the two-point correlation function (2PCF) and power spectrum to the 3PCF and opens an avenue for deriving additional cosmological distance information from future large-scale structure redshift surveys such as DESI. Our measured distance scale from the 3PCF is fairly independent from that derived from the pre-reconstruction 2PCF and is equivalent to increasing the length of BOSS by roughly 10 per cent; reconstruction appears to lower the independence of the distance measurements. Fitting a model including tidal tensor bias yields a moderate-significance (2.6σ) detection of this bias with a value in agreement with the prediction from local Lagrangian biasing.
Original languageEnglish
Pages (from-to)1738-1751
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume469
Issue number2
Early online date1 Mar 2017
DOIs
Publication statusPublished - 1 Aug 2017

Keywords

  • astro-ph.CO
  • RCUK
  • STFC
  • ST/M001709/1
  • ST/N000668/1
  • cosmology: observations
  • distance sacle
  • large-scale structure of Universe

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