TBD

Galaxy morphology: how the growth of their bulge shapes the evolution of galaxies -- Almost a century after the publication of the Hubble sequence (Hubble 1926), that classifies galaxies according to their shapes and features, galaxy morphology remains a topical issue. Indeed, the structure of galaxies provide insight on how they acquire their mass, grow […]

TBD

Towards simulating the Epoch of Reionization on exascale supercomputers --  The Epoch of Reionization (EoR) represents a fundamental phase transition in cosmic history, demanding sophisticated numerical simulations to interpret observations of the high-z Lyman alpha forest, combined with HST/JWST, and upcoming 21cm surveys. Our latest Cosmic Dawn III simulation has redefined the state-of-the-art by simultaneously […]

Mapping Extended Circumgalactic Lyα Nebulae Around Quasars With J-PAS --  Circum-Galactic Medium (CGM) is the gas surrounding galaxies outside their disksand inside their virial radii. Lyman-alpha (Lyα) emission is one of the most important spectral features for probing the CGM at high redshifts, providing crucial insights into the formation and evolution of galaxies and their […]

Title : Evolution of embedded protostars studied with submillimeter and near-infrared observations Abstract : Sun-like stars are thought to accrete most of their final mass during the protostellar phase, where the protostellar embryo is surrounded by an infalling dense envelope. The so-called Class 0 phase designates the youngest protostellar stage, where the accretion is thought […]

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 […]