Weak Gravitational Lensing of CMB - Revisit

Details Weak Gravitational Lensing of CMB - Revisit Weak Gravitational Lensing of CMB - Revisit

2009-03-26

arxiv.org/abs/0903.4519v1

Astrophys.J.698:1771-1777,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in the Astrophysical Journal. 18 pages, 6 figures

Scientific paper

10.1088/0004-637X/698/2/1771

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 $l=2000$).

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