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- W3103891055 abstract "We present the optimal convergence and shear estimators for lensing reconstruction from the cosmic microwave background temperature field. This generalizes the deflection estimator, is sensitive to non-lensing modes, provides internal consistency checks, and is always at least as optimal. Previously, these estimators were only known in the squeezed limit. This paper decomposes convergence and shear fields into cosine and sine waves and the lensed correlation function is then Taylor expanded in the wave amplitudes. Maximizing the likelihood function gives the optimal estimators for the convergence and shear fields. This method has the potential to improve the lensing reconstruction of the cosmic microwave background polarization field: the shear and convergence can be optimally combined to form a deflection estimator, or used separately to separate non-lensing modes, or utilize lensing of non-Gaussian secondary foregrounds." @default.
- W3103891055 created "2020-11-23" @default.
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- W3103891055 date "2020-11-18" @default.
- W3103891055 modified "2023-09-27" @default.
- W3103891055 title "Cosmic microwave background lensing with optimal convergence and shear estimators" @default.
- W3103891055 hasPublicationYear "2020" @default.
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