Weak Gravitational Lensing of CMB - Revisit

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Yu, B.
Lu, T.
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In this paper, we revisit the weak gravitational lensing of CMB. The key point is that the deflection angle of CMB photon varies with the redshift. From this we obtain a set of modified power spectra. Compared with the ones calculated before, the temperature, the polarization E mode and the cross power spectra correction are of the order $0.01 %$, while the polarization B mode correction is about $0.4 %$ (to $l=2000$).
Comment: Accepted for publication in the Astrophysical Journal. 18 pages, 6 figures
Keywords
Astrophysics - Cosmology and Nongalactic Astrophysics
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