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Analyse multi-échelle du processus de réionisation dans les simulations cosmologiques

Abstract : The reionization period is a major step in the history of the Universe that change its ionization state. The increasing progress in high performance computing, allows us to model the phenomenon. Usually, the simulation analyses focus on global properties to constrain the impact of the physic put in the simulations. Alternately, I implemented a method of analysis that apprehend theglobal reionization in terms of multiple ‘local reionizations’. I extracted a merger tree of HII regions from the simulations to characterize the reionization process. I applied the technique in several cosmological simulations, where different ionizing source models were tested to investigate the impact of the source model on the reionization chrono-morphology. I also used the merger tree to characterize the past reionization history of MW type galaxies. I finally applied this methodology in Local Group simulations to quantify the reionization hystory of MW and M31.
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https://tel.archives-ouvertes.fr/tel-00985573
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Submitted on : Wednesday, April 30, 2014 - 9:52:09 AM
Last modification on : Tuesday, October 19, 2021 - 7:00:23 PM
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  • HAL Id : tel-00985573, version 1

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Jonathan Chardin. Analyse multi-échelle du processus de réionisation dans les simulations cosmologiques. Autre. Université de Strasbourg, 2013. Français. ⟨NNT : 2013STRAH008⟩. ⟨tel-00985573⟩

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