Lensing Reconstruction with CMB Temperature and Polarization
Abstract
Weak gravitational lensing by intervening large-scale structure induces a distinct signature in the cosmic microwave background (CMB) that can be used to reconstruct the weak-lensing displacement map. Estimators for individual Fourier modes of this map can be combined to produce an estimator for the lensing-potenial power spectrum. The naive estimator for this quantity will be biased upwards by the uncertainty associated with reconstructing individual modes; we present an iterative scheme for removing this bias. The variance and covariance of the lensing-potenial power spectrum estimator are calculated and evaluated numerically in a CDM universe for Planck and future polarization-sensitive CMB experiments.
Keywords
Cite
@article{arxiv.astro-ph/0302536,
title = {Lensing Reconstruction with CMB Temperature and Polarization},
author = {Michael Kesden and Asantha Cooray and Marc Kamionkowski},
journal= {arXiv preprint arXiv:astro-ph/0302536},
year = {2016}
}
Comments
15 pages, 3 figures, submitted to PRD