Halo asphericity and the shear 3-pt function

Abstract

We demonstrate through the use of a simple toy model that asphericity in dark matter halos has a measurable effect on the configuration dependence of the weak lensing shear 3-point function at small scales. This sensitivity provides a way, in principle, to measure the shapes of dark matter halos. The distribution of halo ellipticities should be included in models aiming at a high fidelity prediction of n-point shear correlation statistics.

arXiv comment3 pages, 3 figures. Minor changes to match version accepted by ApJ

References in corpus (9)

• The Structure of Cold Dark Matter Halos
• Weak Gravitational Lensing
• Halo Models of Large Scale Structure
• Probing the Universe with Weak Lensing
• The Three-Point Correlation Function in Cosmology
• Three-Point Correlations in Weak Lensing Surveys: Model Predictions and Applications
• Cluster cross sections for strong lensing: analytic and numerical lens models
• The three-point correlation function of cosmic shear: I. The natural components
• Higher-order moments of the lensing shear and other spin two fields

Cited by in corpus (11)

• Intrinsic alignment-lensing interference as a contaminant of cosmic shear
• A halo model for intrinsic alignments of galaxy ellipticities
• A Detection of Dark Matter Halo Ellipticity using Galaxy Cluster Lensing in SDSS
• Simulations of weak gravitational lensing
• Two Extreme Young Objects in Barnard 1-b
• Weak Lensing of the CMB by Large-Scale Structure
• Reducing the shear
• The impact of halo shapes on the bispectrum in cosmology
• The galaxy-galaxy lensing contribution to the cosmic shear two point function
• The cosmic shear three-point functions
• Dark Energy Survey Year 3 Results: Three-Point Shear Correlations and Mass Aperture Moments