Lensing reconstruction with CMB temperature and polarization
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.
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.Attached Files
Published - KESprd03.pdf
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Additional details
- Eprint ID
- 5015
- Resolver ID
- CaltechAUTHORS:KESprd03
- NASA
- NAG5-11985
- Department of Energy (DOE)
- DE-FG03-92-ER40701
- NSF Graduate Research Fellowship
- Sherman Fairchild Foundation
- Created
-
2006-09-19Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- TAPIR