A redshift-distortion-free correlation function at third order in the non-linear regime

Kelai Meng, Jun Pan, I. Szapudi, Longlong Feng

Research output: Contribution to journalArticle

Abstract

The zeroth-order component of the cosine expansion of the projected three-point correlation function is proposed for the clustering analysis of cosmic large-scale structure. These functions are third-order statistics but can be measured similarly to the projected two-point correlations. Numerical experiments with N-body simulations indicate that the advocated statistics are redshift distortion free within 10 per cent in the non-linear regime on scales of ~0.2-10h-1Mpc. The halo model prediction of the zeroth-order component of the projected three-point correlation function agrees with simulations within ~10 per cent. This lays the ground for using these functions to perform joint analyses with the projected two-point correlation functions, exploring galaxy clustering properties in the framework of the halo model and relevant extensions.

Original languageEnglish
Pages (from-to)1700-1708
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume413
Issue number3
DOIs
Publication statusPublished - May 2011

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halos
statistics
simulation
galaxies
expansion
prediction
predictions
experiment
analysis

Keywords

  • Cosmology: theory
  • Dark matter
  • Large-scale structure of Universe
  • Methods: statistical

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

A redshift-distortion-free correlation function at third order in the non-linear regime. / Meng, Kelai; Pan, Jun; Szapudi, I.; Feng, Longlong.

In: Monthly Notices of the Royal Astronomical Society, Vol. 413, No. 3, 05.2011, p. 1700-1708.

Research output: Contribution to journalArticle

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