159 articles – 2000 Notices  [english version]
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Monthly Notices of the Royal Astronomical Society 410 (2011) 2481-2487
CMB and SZ effect separation with constrained Internal Linear Combinations
M. Remazeilles1, J. Delabrouille1, J.-F. Cardoso1, 2

The 'Internal Linear Combination' (ILC) component separation method has been extensively used on the data of the Wilkinson Microwave Anisotropy Probe (WMAP) space mission, to extract a single component, the cosmic microwave background (CMB), from the WMAP multifrequency data. We extend the ILC approach for reconstructing millimetre astrophysical emissions beyond the CMB alone. In particular, we construct a constrained ILC to extract maps of both the CMB and the thermal Sunyaev-Zeldovich (SZ) effect, with vanishing contamination from the other. The performance of the constrained ILC is tested on simulations of Planck mission observations, for which we successfully reconstruct independent estimates of the CMB and of the thermal SZ.
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
2 :  LTCI - Laboratoire Traitement et Communication de l'Information [Paris]
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
methods: data analysis – cosmic background radiation