Component separation for Cosmic Microwave Background data : a blind approach based on spectral diversity

G. Patanchon (1) , Hichem Snoussi (2) , J-F. Cardoso , J. Delabrouille (1)

1 PCC - Physique Corpusculaire et Cosmologie - Collège de France
2 L2S - Laboratoire des signaux et systèmes

We present a blind multi-detector multi-component spectral matching method for all sky observations of the cosmic microwave background, working on the spherical harmonics basis. The method allows to estimate on a set of observation maps the power spectra of various components present in CMB data, their contribution evels in each detector and the noise levels. The method accounts for the instrumental effect of beam convolution. We have implemented the method on all sky Planck simulations containing five components and white noise, including beam smoothing effects.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

G. Patanchon, Hichem Snoussi, J-F. Cardoso, J. Delabrouille. Component separation for Cosmic Microwave Background data : a blind approach based on spectral diversity. Workshop on Physics in Signal and Image Processing 3, Jan 2003, Grenoble, France. ⟨in2p3-00013720⟩