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Article Dans Une Revue JCAP Année : 2022

A new estimator for phase statistics

D. Munshi
  • Fonction : Auteur
R. Takahashi
  • Fonction : Auteur
J.D. Mcewen
  • Fonction : Auteur
T.D. Kitching
  • Fonction : Auteur

Résumé

We introduce a novel statistic to probe the statistics of phases of Fourier modes in two-dimensions (2D) for weak lensing convergence field κ. This statistic contains completely independent information compared to that contained in observed power spectrum. We compare our results against state-of-the-art numerical simulations as a function of source redshift and find good agreement with theoretical predictions. We show that our estimator can achieve better signal-to-noise compared to the commonly employed statistics known as the line correlation function (LCF). Being a two-point statistics, our estimator is also easy to implement in the presence of complicated noise and mask, and can also be generalised to higher-order. While applying this estimator for the study of lensed CMB maps, we show that it is important to include post-Born corrections in the study of statistics of phase.

Dates et versions

hal-03361132 , version 1 (01-10-2021)

Identifiants

Citer

D. Munshi, R. Takahashi, J.D. Mcewen, T.D. Kitching, F.R. Bouchet. A new estimator for phase statistics. JCAP, 2022, 05 (05), pp.006. ⟨10.1088/1475-7516/2022/05/006⟩. ⟨hal-03361132⟩
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