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The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: tomographic BAO analysis of DR12 combined sample in configuration space

Research output: Contribution to journalArticle

  • Yuting Wang
  • Gong-Bo Zhao
  • Chia-Hsun Chuang
  • Will J. Percival
  • Héctor Gil-Marín
  • Antonio J. Cuesta
  • Francisco-Shu Kitaura
  • Sergio Rodriguez-Torres
  • Joel R. Brownstein
  • Daniel J. Eisenstein
  • Shirley Ho
  • Jean-Paul Kneib
  • Matt Olmstead
  • Francisco Prada
  • Graziano Rossi
  • Ariel G. Sánchez
  • Salvador Salazar-Albornoz
  • Jeremy Tinker
  • Rita Tojeiro
  • Mariana Vargas-Magaña
  • Fangzhou Zhu
We perform a tomographic baryon acoustic oscillations (BAOs) analysis using the two-point galaxy correlation function measured from the combined sample of Baryon Oscillation Spectroscopic Survey Data Release 12 (BOSS DR12), which covers the redshift range of 0.2 < z < 0.75. Upon splitting the sample into multiple overlapping redshift slices to extract the redshift information of galaxy clustering, we obtain a measurement of DA(z)/rd and H(z)rd at nine effective redshifts with the full covariance matrix calibrated using MultiDark-Patchy mock catalogues. Using the reconstructed galaxy catalogues, we obtain the precision of 1.3–2.2 per cent for DA(z)/rd and 2.1–6.0 per cent for H(z)rd. To quantify the gain from the tomographic information, we compare the constraints on the cosmological parameters using our nine-bin BAO measurements, the consensus three-bin BAO and redshift space distortion measurements at three effective redshifts in Alam et al., and the non-tomographic (one-bin) BAO measurement at a single effective redshift. Comparing the nine-bin with one-bin constraint result, it can improve the dark energy Figure of Merit by a factor of 1.24 for the Chevallier–Polarski–Linder parametrization for equation-of-state parameter wDE. The errors of w0 and wa from nine-bin constraints are slightly improved when compared to the three-bin constraint result.
Original languageEnglish
Pages (from-to)3762-3774
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
Early online date6 May 2017
Publication statusPublished - Aug 2017


  • tomographic BAO analysis of DR12 combined sample in configuration space

    Rights statement: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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