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Open Access Publications from the University of California

Modelling the large-scale redshift-space 3-point correlation function of galaxies

  • Author(s): Slepian, Z
  • Eisenstein, DJ
  • et al.

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© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a configuration-space model of the large-scale galaxy 3-point correlation function (3PCF) based on leading-order perturbation theory and including redshift-space distortions (RSD). This model should be useful in extracting distance-scale information from the 3PCF via the baryon acoustic oscillation method. We include the first redshift-space treatment of biasing by the baryon-dark matter relative velocity. Overall, on large scales the effect of RSD is primarily a renormalization of the 3PCF that is roughly independent of both physical scale and triangle opening angle; for our adoptedm and bias values, the rescaling is a factor of ∼1.8. We also present an efficient scheme for computing 3PCF predictions from our model, important for allowing fast exploration of the space of cosmological parameters in future analyses.

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