Blind component separation for polarized observations of the CMB

Details Blind component separation for polarized observations of the CMB Blind component separation for polarized observations of the CMB

2006-03-02

arxiv.org/abs/astro-ph/0603044v3

Mon.Not.Roy.Astron.Soc.376:739-758,2007

Astronomy and Astrophysics

Astrophysics

20 pages, 21 figures, 1 table, TeX file, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2007.11470.x

We present in this paper the PolEMICA (Polarized Expectation-Maximization Independent Component Analysis) algorithm which is an extension to polarization of the SMICA (Spectral Matching Independent Component Analysis) temperature multi-detectors multi-components (MD-MC) component separation method (Delabrouille et al. 2003). This algorithm allows us to estimate blindly in harmonic space multiple physical components from multi-detectors polarized sky maps. Assuming a linear noisy mixture of components we are able to reconstruct jointly the anisotropies electromagnetic spectra of the components for each mode T, E and B, as well as the temperature and polarization spatial power spectra, TT, EE, BB, TE, TB and EB for each of the physical components and for the noise on each of the detectors. PolEMICA is specially developed to estimate the CMB temperature and polarization power spectra from sky observations including both CMB and foreground emissions. This has been tested intensively using as a first approach full sky simulations of the Planck satellite polarized channels for a 14-months nominal mission assuming a simplified linear sky model including CMB, and optionally Galactic synchrotron emission and a Gaussian dust emission. Finally, we have applied our algorithm to more realistic Planck full sky simulations, including synchrotron, realistic dust and free-free emissions.

Affiliated with

Also associated with

No associations

Rating

Blind component separation for polarized observations of the CMB does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Blind component separation for polarized observations of the CMB, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blind component separation for polarized observations of the CMB will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-368635