© 2024 Observatoire Astronomique de Strasbourg | Webdesign et développement Alchimy.
First light of modern X-ray polarimetry Abstract December 9, 2021 marks the date of the launch of the very first modern X-ray polarimeter, more than 40 years after the OSO-8 mission. IXPE (Imaging X-ray Polarimetry Explorer) has just opened a new window in high energy astronomy, adding...
A global picture of the epoch of reionisation Abstract About a million years after the Big Bang, the Epoch of Reionisation sees the first light sources in the Universe slowly ionise the atoms of the surrounding IGM. Learning about this distant epoch has the potential of unveiling crucial...
The renaissance of globular clusters: old stellar systems for new dynamical questions Abstract The traditional picture of globular clusters (GCs) as old simple stellar systems is being radically revolutionized by groundbreaking observational programs such as Gaia and by extensive...
Characterizing the stellar halo with distribution function based models Abstract A new class of models is used to build a self-consistent model of our Galaxy. The model is defined by the parameters that specify the distribution functions (DFs) f(J) of four stellar discs (three thin-disc age...
Exploiting the full Gaia data: From Bayesian isochrone fitting to transferring spectroscopic stellar parameters to 1 billion Gaia DR3 stars Abstract I will present a new stellar-parameter catalogue obtained from Bayesian isochrone fitting for 400 million Gaia EDR3 stars (cross-matched with...
A new picture for the Large Magellanic Cloud-Milky Way interaction Abstract Over the past decade, our understanding of the Large Magellanic Cloud (LMC) and its relationship to the Milky Way (MW) has undergone a paradigm shift. The LMC now appears to be on the order of 20% of the MW mass. At...
Early Career Researchers the Harbingers of Change: attitudes, behaviours and strategies regarding the changing world of scholarly communication Abstract This presentation is related to an international study informed by a 5-year-long qualitative longitudinal project, which sought to...
Galactic Archaeology with the oldest stars in the Milky Way Abstract The oldest, most metal-poor stars we find in the Milky Way today were born in pristine environments in the early Universe. They contain unique clues about the First Stars and the early formation and evolution of our Galaxy....
Probing the first galaxies and cosmic reionization with the James Webb Space Telescope Abstract The role of dwarf galaxies in the star formation history of the universe has long been overlooked, primarily because of observational challenges and the predominance of bright,...
On the causal origin of properties of dark matter halos and galaxies Abstract Large-cosmological simulations, such as Illustris-TNG or Horizon-AGN, allows to draw relations between the formation history of galaxies and their host haloes (number of mergers, formation time) and their...