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Lensing reconstruction with CMB temperature and polarization

Kesden, Michael and Cooray, Asantha and Kamionkowski, Marc (2003) Lensing reconstruction with CMB temperature and polarization. Physical Review D, 67 (12). Art. No. 123507. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:KESprd03

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Abstract

Weak gravitational lensing by an 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-potential 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-potential power spectrum estimator are calculated and evaluated numerically in a LambdaCDM universe for Planck and future polarization-sensitive CMB experiments.


Item Type:Article
Additional Information:©2003 The American Physical Society. Received 25 February 2003; published 11 June 2003. We thank Wayne Hu for useful discussions. This work was supported in part by NASA NAG5-11985 and DOE DEFG03-92-ER40701. M.K. acknowledges the support of the NSF Graduate program and A.C. acknowledges support from the Sherman Fairchild Foundation.
Group:TAPIR
Subject Keywords:radiofrequency cosmic radiation; electromagnetic wave polarisation; iterative methods; gravitational lenses; cosmology; Fourier analysis
Record Number:CaltechAUTHORS:KESprd03
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KESprd03
Alternative URL:http://dx.doi.org/10.1103/PhysRevD.67.123507
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5015
Collection:CaltechAUTHORS
Deposited By: Lindsay Cleary
Deposited On:19 Sep 2006
Last Modified:26 Dec 2012 09:03

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