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Habilitation à diriger des recherches

Archeops et Planck-HFI : Etudes des systématiques pour l'analyse du fond diffus cosmologique

Abstract : The work presented in this document is driven by the characterisation of the Archeops and Planck-HFI instruments as well as the fight against systematics in order to reconstruct the power spectrum of the temperature anisotropies of the Cosmic Microwave Background.
An introduction on the physics is followed, in a first part, by the description of the calibration of the bolometers of the two instruments using pulsed sources made of carbon fibers that we have developped for measurements of optical leakages between the different cryogenic stages of the focal plane. We explain the analysis of the optical leakages of the Archeops instrument, in combination with measurements of crosstalks and time constants of the bolometers of the Planck's cryogenic qualification model. We also present an analysis of the thermal conductivity and calorific capacity of the fibers that has be done for modelling the thermal behaviour and the emission of these sources.
The second part is dedicated to the analysis of systematic effects on the temperature anisotropies analysis. We describe the measurement of the beams (on the ground and in-flight), the analysis of the bolometer time constants, and the flux calibration on Jupiter data for Archeops. We show how to extract the Fourier spectrum on the circles and what we learn on the cosmic microwave background from such an analysis, which we illustrate on Archeops' data.
The last chapter deals with a proposal for a full sky submillimeter survey for the measurement of the dust polarisation in the galaxy with a high spatial resolution.
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Habilitation à diriger des recherches
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https://tel.archives-ouvertes.fr/tel-00102694
Contributor : Sabine Starita <>
Submitted on : Monday, October 2, 2006 - 3:32:54 PM
Last modification on : Tuesday, November 24, 2020 - 5:42:03 PM
Long-term archiving on: : Monday, April 5, 2010 - 11:59:05 PM

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  • HAL Id : tel-00102694, version 1

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LAL | CNRS | IN2P3

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Sophie Henrot-Versillé. Archeops et Planck-HFI : Etudes des systématiques pour l'analyse du fond diffus cosmologique. Cosmologie et astrophysique extra-galactique [astro-ph.CO]. Université Paris Sud - Paris XI, 2006. ⟨tel-00102694⟩

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