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Accueil   /   Thèses   /   Measuring the growth of massive structures in the distant Universe with deep multi-wavelength surveys

Measuring the growth of massive structures in the distant Universe with deep multi-wavelength surveys

Astrophysique Physique corpusculaire et cosmos

Résumé du sujet

A growing convergence of research lines point to the first massive structures, like groups and clusters, assembling in the distant Universe as rosetta-stones to try to unveil important unsolved questions in galaxy and structures formation and evolution. This includes understanding the physical processes by which galaxies are fuelled by gas (which allows them to form their stars), by which galaxies change their structures, the role played by galaxy mergers, the feedback with their internal growing black holes, and interactions and the paths through which they eventually stop forming stars.

We propose a PhD project in which the student will participate to this research within a large international consortium that is leading large observational program of distant groups and clusters. Primarily the PhD student will be involved in using data from a recently awarded large program with the NOEMA interferometer that will use 159 hours of observations to discovery (confirm) and study 40 groups and clusters at 2<z<3.5. Additional observations from space and ground-based facilities will also be used. Key science goals will include: 1) the estimate of the evolving number densities of these structures and comparison to theoretic models as a strong constrain to structure formation theory and baryon assembly; 2) the measurement of the statistical modulation of star formation activity in these environments as a test of cold accretion theories; 3) the measurement of the statistical progression of quenching as a function of structure mass and redshift, as a powerful test of quenching mechanisms.

This thesis will potentially provide a solid formation for the student in many aspects of observational cosmology, from observations at one of the best ground-based telescopes to data analysis and interpretation all the way possibly to modeling, based also on the interests of the students and on results.


Institut de recherche sur les lois fondamentales de l’univers
Direction d’Astrophysique
Laboratoire de Cosmologie et d’Evolution des Galaxies
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