Foreground component separation with generalised ILC
Abstract
The 'Internal Linear Combination' (ILC) component separation method has been extensively used to extract a single component, the CMB, from the WMAP multifrequency data. We generalise the ILC approach for separating other millimetre astrophysical emissions. We construct in particular a multidimensional ILC filter, which can be used, for instance, to estimate the diffuse emission of a complex component originating from multiple correlated emissions, such as the total emission of the Galactic interstellar medium. The performance of such generalised ILC methods, implemented on a needlet frame, is tested on simulations of Planck mission observations, for which we successfully reconstruct a low noise estimate of emission from astrophysical foregrounds with vanishing CMB and SZ contamination.
Cite
@article{arxiv.1103.1166,
title = {Foreground component separation with generalised ILC},
author = {Mathieu Remazeilles and Jacques Delabrouille and Jean-Francois Cardoso},
journal= {arXiv preprint arXiv:1103.1166},
year = {2016}
}
Comments
11 pages, 6 figures (2 figures added), 1 reference added, introduction expanded, V2: version accepted by MNRAS