CMB and SZ effect separation with constrained Internal Linear Combinations

By M. Remazeilles, Jacques Delabrouille, Jean-François Cardoso. 2010

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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.

Subfields: Applied Mathematics, Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/83c570f36800bc49c3fa210eddaddf5f6726b0a4

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In Applied Mathematics

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Planck 2015 results. I. Overview of products and scientific results (2015, methodology): “For each detector, the TOIs are only modified by a single offset value per ring, determined using the destriping method described in Tristram et al. (2011). The offsets are computed simultaneously for all bolometers at a given frequency, using the full mission data.”