Preparation to the CMB Planck analysis : contamination due to the polarized galactic emission

TL;DR

This paper develops and optimizes 3D models of galactic polarized emissions to estimate their contamination of the CMB signal measured by the Planck satellite, crucial for accurate cosmological analysis.

Contribution

It introduces coherent 3D models of galactic polarized emissions and validates them against existing data to assess their impact on CMB measurements.

Findings

Models successfully fit WMAP, ARCHEOPS, and 408 MHz data.

Estimated galactic foreground contamination levels at Planck frequencies.

Provided tools for foreground removal in CMB analysis.

Abstract

The Planck satellite experiment, which was launched the 14th of may 2009, will give an accurate measurement of the anisotropies of the Cosmic Microwave Background (CMB) in temperature and polarization. This measurement is polluted by the presence of diffuse galactic polarized foreground emissions. In order to obtain the level of accuracy required for the Planck mission it is necessary to deal with these foregrounds. In order to do this, have develloped and implemented coherent 3D models of the two main galactic polarized emissions : the synchrotron and thermal dust emissions. We have optimized these models by comparing them to preexisting data : the K-band of the WMAP data, the ARCHEOPS data at 353 GHz and the 408 MHz all-sky continuum survey. By extrapolation of these models at the frequencies where the CMB is dominant, we are able to estimate the contamination to the CMB Planck signal due to these polarized galactic emissions.