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Séminaire - Matthieu Quéval "Prof après des études d’astrophysique ? Un projet professionnel tout à fait pertinent !" La carrière d'enseignant est choisie régulièrement après un master, ou après une thèse ou un postdoc. Matthieu Quéval nous fera part de sa passion,...
"Formation the Milky Way's inner stellar halo and disc: insights from numerical simulations and observations" In this talk I will present recent results regarding the formation history of the Milky Way's stellar halo and disc. Gaia has conclusively shown that the inner stellar halo is dominated...
"Pulsar Timing arrays: first evidence of a gravitational wave signal at low frequency" Since the 2000s, most of the world's major radio telescopes have accumulated arrival time measurements for several tens of millisecond pulsars, with timing accuracy reaching a few tens of nanoseconds for some...
"The interplay of dwarf galaxies and their globular clusters" Dwarf galaxies have raised several challenges to the current galaxy formation models, as the outputs of the most recent cold dark matter (CDM) cosmological simulations are not consistent with the observed properties of dwarf...
"Stochastic gravitational wave backgrounds from primordial black holes" The first detection of gravitational waves by LIGO in 2015 opened a new window of observation to the Universe and gave rise to a wide variety of research avenues. In this seminar, I will introduce gravitational waves with a...
"An astrophysicist's nightmare: When we thought we understood it all, the Universe chose to disagree" Star clusters, large groups of up to millions of stars, are the basic building blocks of the galaxies in which they are formed and evolve. Understanding star cluster formation and evolution is...
"Unravelling the formation of globular clusters in low-metallicity environments" James Webb Space Telescope has now started to uncover the first proto-globular clusters (GCs) that emerged during the Cosmic Dawn. These clusters were compact (effective radii ~parsecs) and exhibited extreme...
"Understanding the accretion history of our Galaxy through the lens of globular clusters" In the context of the hierarchical formation of galaxies, the search for galaxies accreted by the Milky Way has been a subject of study for decades. The main focus of this research is on Galactic globular...
"Exploring the Epoch of Reionization with Scattering Transforms" Scattering transforms have proven to be a powerful statistical tool for characterizing non-Gaussian processes across various astrophysical contexts. In this presentation, we extend their application to the 21cm signal from the...
"Modeling interstellar dust" Interstellar dust has long been modeled with separate silicate and graphite/amorphous carbon components. In this talk, I will argue that initially distinct populations of carbonaceous and silicate stardust get rapidly homogenized in the interstellar medium (ISM)...