Reconstruction of the CMB lensing for Planck

Abstract

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, even in the presence of point sources residuals.

14 pages, 7 figures, major update to account for the impact of the point sources emission

References in corpus (2)

• The Scientific Programme of Planck
• Impact of Instrumental Systematic Contamination on the Lensing Mass Reconstruction using the CMB Polarization

Cited by in corpus (8)

• Planck 2013 results. XVII. Gravitational lensing by large-scale structure
• CMB Lensing Reconstruction in Real Space
• Bias-Hardened CMB Lensing with Polarization
• Removing the ISW-lensing bias from the local-form primordial non-Gaussianity estimation
• Real space estimator for the weak lensing convergence from the CMB
• LiteBIRD Science Goals and Forecasts: A full-sky measurement of gravitational lensing of the CMB
• Measuring primordial gravitational waves from CMB B-modes in cosmologies with generalized expansion histories
• CMB-PAInT: An inpainting tool for the cosmic microwave background