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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2006

The cosmic shear three-point functions

R. Scoccimarro
  • Fonction : Auteur

Résumé

We investigate the three-point functions of the weak lensing cosmic shear, using both analytic methods and numerical results from N-body simulations. The analytic model, an isolated dark matter halo with a power-law profile chosen to fit the effective index at the scale probed, can be used to understand the basic properties of the eight three-point functions observed in simulations. We use this model to construct a single three-point function estimator that "optimally" combines the eight three-point functions. This new estimator is an alternative to M_ap statistics and provides up to a factor of two improvement in signal to noise compared to previously used combinations of cosmic shear three-point functions.
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Dates et versions

hal-04111491 , version 1 (01-06-2023)

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K. Benabed, R. Scoccimarro. The cosmic shear three-point functions. Astronomy and Astrophysics - A&A, 2006, 456, pp.421-432. ⟨10.1051/0004-6361:20054125⟩. ⟨hal-04111491⟩
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