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Polarisation du fond diffus cosmologique et de l'émission des poussières galactiques

Abstract : The cosmic microwave background (CMB) permits the accurate determination of most of the cosmological parameters and sheds light on the primordial Universe and on high energy physics. ARCHEOPS is a balloon borne experiment designed to measure the CMB temperature anisotropies over a large fraction of the sky. It also prepares the satellite mission PLANCK and has bolometers sensitive to polarization dedicated to the study of Galactic dust radiation.
After a description of the other current methods that estimate the cosmological parameters, the first part of this thesis describes the physics of the CMB and its polarization. The second part is dedicated to the analysis of ARCHEOPS polarized data. This analysis shows that the diffuse emission from Galactic dust is coherently polarized on large scales and will therefore be the major foreground for PLANCK-HFI. I conclude on the prospect of detection of the primordial gravitational waves background through CMB polarization.
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https://tel.archives-ouvertes.fr/tel-00003465
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Submitted on : Friday, October 3, 2003 - 2:13:56 PM
Last modification on : Thursday, November 19, 2020 - 12:58:45 PM
Long-term archiving on: : Friday, April 2, 2010 - 7:34:19 PM

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  • HAL Id : tel-00003465, version 1

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Citation

Nicolas Ponthieu. Polarisation du fond diffus cosmologique et de l'émission des poussières galactiques. Cosmologie et astrophysique extra-galactique [astro-ph.CO]. Université Joseph-Fourier - Grenoble I, 2003. Français. ⟨tel-00003465⟩

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