Construction optimale d'images bolométriques : contribution à l'étude du milieu interstellaire et du rayonnement fossile

Optimal construction of bolometer images : contribution to the study of the interstellar medium and the cosmic microware background

• Auteur / Autrice : Xavier Dupac
• Direction : Martin Giard
• Type : Thèse de doctorat
• Discipline(s) : Astrophysique
• Date : Soutenance en 2002
• Etablissement(s) : Toulouse 3

Mots clés

Mots clés contrôlés

Cartographie spatiale

Poussière interplanétaire

Rayonnement du fond du ciel

Mots clés libres

Construction de cartes

Ballons

Milieu interstaire

Poussière

Cosmologie

Rayonnement fossile

Résumé

This work takes part of the development of far-infrared and millimeter astrophysics. We have worked on the data processing and analysis in the fields of the Galactic interstellar medium, through the dust thermal emission, and cosmology through the observation of the cosmic microwave background fluctuations. We have been particularly interested in optimal map-making by inverse linear methods. We have developed a new map-making method for the balloon-borne submillimeter experiment PRONAOS, based on a Wiener inversion matrix, which allows to globally reconstruct the map. The analysis of PRONAOS maps in massive star-forming complexes as Orion and M17 allowed us to discover the large variations of the physical conditions and the dust properties. We showed an anticorrelation between the temperature and the submillimeter spectral index. Our investigations concerning this effect favour causes related to the intrinsic physics of the grains. . .