David Whitworth is a new postdoc at the ENS.

Unleashing the predictive power of tidal disruption events The tidal force from a supermassive black hole can disrupt a star passing too close, resulting in a powerful electromagnetic flare as the stellar debris fuels the compact object. Such tidal disruption events provide a unique window into the otherwise hidden population of quiescent supermassive black holes […]

En Salle des thèse à l’ENS.

The impact of stellar feedback on galaxies Small-scale stellar feedback can impact the large-scale evolution of galaxies by regulating star formation and by driving galactic fountain flows and outflows. Using modern high-performance computing simulations, we can study the relative importance of stellar winds, radiation, and supernovae in shaping the multi-phase interstellar medium. Using these simulations, […]

Title: From cosmic lasagna to space-time spaghetti -- obtaining the least-model-dependent strong gravitational lensing probe   Abstract: Strong gravitational lensing has advanced as a standard probe to map mass densities of cosmic structures or to try and infer parameters of the cosmological concordance model, like the Hubble Constant. In this talk, I will introduce those properties […]

Title: Probing Cold Gas around Galaxies through the Mg II Resonance Doublet Abstract: The structure and kinematics of the gas around and in galaxies are crucial for understanding the multiphase flows within the galactic ecosystem and, thus, galaxy evolution and star formation. Recent advancements in instruments and techniques offer a new perspective on circumgalactic gas flows […]

Title:    Results and perspectives from the ExoGRAVITY Large Programme Abstract: The direct detection of a giant exoplanet using long-baseline interferometry in 2019 marked the debut of the GRAVITY instrument in exoplanet research. This breakthrough was followed by the detailed spectroscopic characterization of beta Pictoris b's atmosphere in 2020, demonstrating the potential of long-baseline interferometry […]

Titre: L’impact du dérèglement climatique sur l'astronomie observationnelle Résumé: Les grands observatoires astronomiques fonctionnant dans le visible/infrarouge sont souvent accompagnés de station météo afin de suivre les paramètres clés qui affectent la qualité des observations obtenues. La plupart de ces suivis ont maintenant atteint une échelle temporelle de 30ans, permettant d'explorer si il existe des […]

Title: METIS - the Mid-Infrared ELT Camera and Spectrograph Abstract: With a primary mirror diameter of 39 metres, the European Southern Observatory's Extremely Large Telescope (ELT), the largest optical telescope in the world, will go into operation at the end of the decade. METIS, a combination of a camera and spectrograph for the mid-infrared, will […]