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Astronomy and Astrophysics 519 (2010) A4
Reconstruction of the cosmic microwave background lensing for Planck
L. Perotto1, 2, J. Bobin3, 4, S. Plaszczynski2, J.-L. Starck3, A. Lavabre2
PLANCK Collaboration(s)

We prepare real-life Cosmic Microwave Background (CMB) lensing extraction with the forthcoming Planck satellite data, by studying two systematic effects related to the foregrounds contamination: the impact of foreground residuals after a component separation on the lensed CMB map, and of removing a large contaminated region of the sky. We first use the Generalized Morphological Component Analysis (GMCA) method to perform a component separation within a simplified framework which allows a high statistics Monte-Carlo study. For the second systematic, we apply a realistic mask on the temperature maps and then, restore them using a recent inpainting technique on the sphere. We investigate the reconstruction of the CMB lensing from the resultant maps using a quadratic estimator in the flat sky limit and on the full sphere. We find that the foreground residuals from the GMCA method does not alter significantly the lensed signal, nor does the mask corrected with the inpainting method.
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 :  LAL - Laboratoire de l'Accélérateur Linéaire
3 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
4 :  ACM - Department of Applied & Computational Mathematics
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
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