Reconstruction of the cosmic microwave background lensing for Planck
Abstract
Aims. We prepare real-life cosmic microwave background (CMB) lensing extraction with the forthcoming Planck satellite data by studying two systematic effects related to the foreground contamination: the impact of foreground residuals after a component separation on the lensed CMB map, and the impact of removing a large contaminated region of the sky. Methods. 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 with a recently developed 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. Results. We find that the foreground residuals from the GMCA method does not significantly alter the lensed signal, which is also true for the mask corrected with the inpainting method, even in the presence of point source residuals.
Additional Information
© 2010 ESO. Received 6 March 2009; Accepted 19 February 2010; Published online 06 September 2010. We warmly thank Duncan Hanson for providing us the second-order non-Gaussian noise term biasing the projected potential APS estimation and for helpful discussions. We also thank Martin Reinecke for his help on the HEALPix package use. We acknowledge use of the CAMB, LENSPix, HEALPix-Cxx and MRS packages. This work was partially supported by the French National Agency for Research (ANR-05-BLAN-0289-01 and ANR-08-EMER-009-01).Attached Files
Published - Perotto2010p11927Astron_Astrophys.pdf
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Additional details
- Eprint ID
- 21091
- Resolver ID
- CaltechAUTHORS:20101201-100853519
- ANR-05-BLAN-0289-01
- French National Agency for Research
- ANR-08- EMER-009-01
- French National Agency for Research
- Created
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2010-12-01Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field