Journal Article

CMB and SZ effect separation with constrained Internal Linear Combinations

Mathieu Remazeilles, Jacques Delabrouille and Jean-François Cardoso

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 410, issue 4, pages 2481-2487
Published in print February 2011 | ISSN: 0035-8711
Published online January 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17624.x
CMB and SZ effect separation with constrained Internal Linear Combinations

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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.

Keywords: methods: data analysis; cosmic background radiation

Journal Article.  4091 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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