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A. Lewis, A. Challinor, and A. Lasenby, Astrophys. J. 538
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C. M. Hirata and U. Seljak, Phys. Rev. D68
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R. E. Smith, J. A. Peacock, A. Jenkins, S. D. M. White, C. S. Frenk, F. R. Pearce, P. A. Thomas, G. Efstathiou, and H. M. P. Couchmann (VIRGO Consortium), Mon. Not. Roy. Astron. Soc. 341
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K. M. Smith, W. Hu, and M. Kaplinghat, Phys. Rev. D74
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R. Durrer, The Cosmic Microwave Background (Cambridge University Press, 2008)
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J. Lesgourgues, (2011), arXiv:1104.2932 [astro-ph.IM]
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D. Blas, J. Lesgourgues, and T. Tram, JCAP 1107
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2011
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2016

Impact of next-to-leading order contributions to CMB lensing

Marozzi, Giovanni, Fanizza, Giuseppe, Di Dio, Enea et al.

Understand

In this Letter we study the impact on cosmological parameter estimation, from present and future surveys, due to lensing corrections on CMB temperature and polarization anisotropies beyond leading order.

In particular, we show how post-Born corrections, LSS effects and the correction due to the change in the polarization direction between the emission at the source and the detection at the observer, are non-negligible in the determination of the polarization spectra.
They have to be taken into account for an accurate estimation of cosmological parameters sensitive to or even based on these spectra.
We study in detail the impact of higher order lensing on the determination of the tensor-to-scalar ratio $r$ and on the estimation of the effective number of relativistic species $N_\text{eff}$.

Built on

U. Seljak, Astrophys. J. 463
1996
Earlier work this paper cites.
A. Lewis, A. Challinor, and A. Lasenby, Astrophys. J. 538
2000
Earlier work this paper cites.
C. M. Hirata and U. Seljak, Phys. Rev. D68
2003
Earlier work this paper cites.
R. E. Smith, J. A. Peacock, A. Jenkins, S. D. M. White, C. S. Frenk, F. R. Pearce, P. A. Thomas, G. Efstathiou, and H. M. P. Couchmann (VIRGO Consortium), Mon. Not. Roy. Astron. Soc. 341
2003
Earlier work this paper cites.
A. Lewis and A. Challinor, Phys. Rept. 429
2006
Earlier work this paper cites.
K. M. Smith, W. Hu, and M. Kaplinghat, Phys. Rev. D74
2006
Earlier work this paper cites.
R. Durrer, The Cosmic Microwave Background (Cambridge University Press, 2008)
2008
Earlier work this paper cites.
M. Kamionkowski, Phys. Rev. Lett. 102
Original
2009
Earlier work this paper cites.
J. Lesgourgues, (2011), arXiv:1104.2932 [astro-ph.IM]
Original
2011
Earlier work this paper cites.
D. Blas, J. Lesgourgues, and T. Tram, JCAP 1107
Original
2011
Earlier work this paper cites.
C. W. F. Everitt et al. , Phys. Rev. Lett. 106
Original
2011
Earlier work this paper cites.