Modelling the redshift-space three-point correlation function in SDSS-III

Hong Guo, Zheng Zheng, Y. P. Jing, Idit Zehavi, Cheng Li, David H. Weinberg, Ramin A. Skibba, Robert C. Nichol, Graziano Rossi, Cristiano G. Sabiu, Donald P. Schneider, Cameron K. McBride

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Abstract

We present the measurements of the redshift-space three-point correlation function (3PCF) for z~0.5 luminous red galaxies of the CMASS sample in the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey Data Release 11. The 3PCF measurements are interpreted within the halo occupation distribution framework using high-resolution N-body simulations, and the model successfully reproduces the 3PCF on scales larger than 1Mpc/h. As with the case for the redshift-space two-point correlation functions, we find that the redshift-space 3PCF measurements also favour the inclusion of galaxy velocity bias in the model. In particular, the central galaxy in a halo is on average in motion with respect to the core of the halo. We discuss the potential of the small-scale 3PCF to tighten the constraints on the relation between galaxies and dark matter haloes and on the phase-space distribution of galaxies.
Original languageEnglish
Pages (from-to)L95-L99
JournalMonthly Notices of the Royal Astronomical Society
Volume449
Issue number1
DOIs
Publication statusPublished - 14 Mar 2015

Keywords

  • astro-ph.CO
  • astro-ph.GA
  • galaxies: distances and redshifts
  • galaxies: haloes
  • galaxies: statistics
  • cosmology: observations
  • cosmology: theory
  • large-scale structure of Universe
  • RCUK
  • STFC

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