publication . Preprint . Article . 2017

Weak lensing deflection of three-point correlation functions

Susan Pyne; Benjamin Joachimi; Hiranya V. Peiris;
Open Access English
  • Published: 04 Aug 2017
Abstract
Weak gravitational lensing alters the apparent separations between observed sources, potentially affecting clustering statistics. We derive a general expression for the lensing deflection which is valid for any three-point statistic, and investigate its effect on the three-point clustering correlation function. We find that deflection of the clustering correlation function is greatest at around $z=2$. It is most prominent in regions where the correlation function varies rapidly, in particular at the baryon acoustic oscillation scale where it smooths out the peaks and troughs, reducing the peak-to-trough difference by about 0.1 percent at $z=1$ and around 2.3 per...
Persistent Identifiers
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsPhysics::Space Physics
free text keywords: Astrophysics - Cosmology and Nongalactic Astrophysics, Astronomy and Astrophysics, Cluster analysis, Point correlation, Astrophysics, General expression, Weak gravitational lensing, Physics, Deflection (engineering)
Funded by
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
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