Preparation to the CMB PLANCK data analysis, estimation of the contamination due to the galactic polarized emissions

TL;DR

This paper prepares for PLANCK satellite data analysis by modeling and estimating the contamination from polarized galactic emissions, crucial for accurate CMB polarization measurements.

Contribution

It introduces a coherent 3D model of galactic polarized emissions and compares it with existing data to estimate foreground contamination at CMB frequencies.

Findings

The models align well with WMAP, Archeops, and all-sky survey data.

Estimated polarized foreground contributions at CMB frequencies.

Enhanced understanding of galactic emission impact on CMB polarization measurements.

Abstract

This work is point of the preparation to the analysis of the PLANCK satellite data. The PLANCK satellite is an ESA mission which has been launched the 14th of may 2009 and is dedicaced to the measurement of the Cosmic Microwave Background (CMB) in temperature and polarization. The presence of diffuse Galactic polarized emissions disturb the measurement of the CMB anisotropies, in particular in polarization. Therefore a precise knowledge of these emissions is needed to obtain the level of accuracy required for PLANCK. In this context, we have developed and implemented a coherent 3D model of the two mains polarized Galactic emissions : synchrotron and thermal dust. We have compared these models to preexisting data: the 23 GHz band of the WMAP data, the 353 GHz Archeops data and the 408 MHz all-sky continuum survey. We extrapolate these models to the frequencies where the CMB dominates and we are able to estimate the contribution of polarized foreground emissions to the polarized CMB emission measured with PLANCK.