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"New radiative transfer methods in numerical simulation of the epoch of reionisation" In current cosmological simulations, the radiative transfer modules generally rely on the M1 approximation, which has some glaring flaws related to its fluid-like behaviour, such as spurious pseudo-sources and...
"Probing the local low surface brightness Universe in the era of the Euclid space telescope." This thesis is dedicated to evaluating and enhancing the Euclid space telescope’s capability to detect extended and faint structures in the Local Universe—commonly referred to as Low Surface...
"Implicit Likelihood Cosmological Inference: Simulations & Diagnostics" Ongoing cosmological surveys map the large-scale structure of the Universe across immense volumes. Extracting robust cosmological information from these data requires fast, high-precision simulations of the survey...
"Dark matter and the MOND phenomenology in galaxies." We discuss the phenomenology of dark matter at galactic scales and the intriguing MOND (Modified Newtonian Dynamics) formula for the rotation curves of galaxies, the baryonic Tully-Fisher relation (BTFR) and the radial acceleration relation...
Les journées européennes du patrimoine 2025 auront lieu du 19 au 21 septembre. Le Jardin des sciences organise de nombreuses activités. Une visite de l'Observatoire astronomique est prévue le dimanche 21 septembre à 16h, mais elle est déjà complète. Vous pouvez consulter le programme...
"Analyzing the millimeter to centimeter emission of nearby galaxies" Compared to the well-studied infrared and radio domains, galaxy emission in the millimeter–centimeter range (300–30 GHz) has been far less explored. This domain is challenging to study due to faint signals, overlapping...
"Faint but not forgotten: what simulations reveal about Low Surface Brightness Galaxies" Low Surface Brightness Galaxies (LSBGs) constitute a substantial fraction of galaxies in the local Universe, being primarily bulge-less, late-type galaxies, bluer and more gas-rich than their high surface...
"Dynamics of galaxies as probes to constrain gravity models" In this thesis, we test cosmological and gravitational models (ΛCDM and MOND) using idealized galaxy simulations. Ultra-diffuse galaxies (UDGs) in the Coma cluster exhibit higher velocity dispersions than MOND predicts. Our MOND...
"Vz-GAL: Probing Cold Molecular Gas in Dusty Star-forming Galaxies at z=1-6." Reconstructing the physical mechanisms that have shaped present-day galaxies remains a primary goal in observational cosmology. I will introduce the Vz-GAL VLA CO(1–0) Survey, a comprehensive endeavor targeting...
"Formation of Fornax dwarf spheroidal and the survival of its globular clusters " The presence of globular clusters (GCs) in the Fornax dwarf spheroidal is an important test of the theories aiming to address the missing mass problem. The problem is that in most of them, the GCs are expected to...