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Multimessenger astronomy with neutrinos : what have we learned so far ? Abstract The recent detection of high-energy astrophysical neutrinos and gravitational waves open a new era in multimessenger astronomy. Exploring high-energy sources with these new messengers and electromagnetic...
What can auto-differentiation do for you? Applications of machine-learning tools to stars, dynamics and dust Abstract Machine learning has found increasing use in astronomy over the last few years. In this talk, instead of discussing machine learning itself, I will discuss how a mathematical...
Galaxy evolution in the metric of the cosmic web Abstract The matter distribution in the Universe follows a spectacular web-like structure consisting of voids, walls, filaments and nodes, naturally defining the environment in which galaxies form and evolve across cosmic time. That certain...
X-ray polarimetry with IXPE Abstract Polarimetry in the X-ray band would help us answer many open questions on the nature of emission processes and geometry in many celestial sources. However, the field of X-ray polarimetry has been dormant for decades, with only one object, the Crab Nebula,...
A statistical study on young giant planets from radial velocity surveys Abstract The study of the close to 5000 exoplanets and brown dwarfs companions known to date has evidenced the importance of early evolution stages of planet formation processes. Yet, a better understanding of...
Cosmological tensions: hints for a new concordance model? Abstract The Cosmic Microwave Background temperature and polarization anisotropy measurements have provided strong confirmation of the LCDM model of structure formation. Even if this model can explain incredibly well the...
The diversity of galaxies in the low surface brightness Universe Abstract Recent advances in imaging capabilities have transformed our understanding of galaxies at the low surface brightnesses frontier, unveiling a new population of ever smaller "ultra-faint" dwarf galaxies, and more and...
Dark matter: 'real stuff' or gravity misunderstood? AbstractFor almost a century, astronomers have been in conflict about the mysterious nature of dark matter. Is the additional mass that we observe in the Universe ‘real’, or is it the result of deviations from the laws of gravity as we...
L'observatoire astronomique participe cette année à deux Villages des Sciences, les 2 et 3 octobre en Alsace. Village des sciences de Cronenbourg Le premier se tiendra sur le Campus de Cronenbourg, ouvert au public à l'occasion de son 60ème anniversaire. Venez nous retrouver samedi et...
Galaxy Modelling Tools: From mock catalogues, spurious parallaxsolutions and chemical evolution Abstract With each data release the Gaia mission provides us with more observational constraints of the Milky Way. What we are able to infer from these is limited by our ability to model and...