Pierre-Alain Duc (Strasbourg)

Probing galaxy formation and evolution with deep imaging and numerical simulations
When May 02, 2019 from 02:30 PM to 03:30 PM
What
  • Colloquium
Where SH Lecture Hall
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Cosmological models predict that today's galaxies were assembled through multiple collisions and mergers. These cosmic events have left various imprints in their surroundings, such as shells, streams, tails and extended stellar halos. Detecting and analyzing them, one may hence probe the past mass assembly of galaxies. However, collisional debris are very faint and difficult to identify. I will present deep optical imaging techniques able to reveal these low surface brightness structures, and the numerical simulations used to interpret them. The spectacular images we obtained at the Canada-France-Hawaii Telescope of a large sample of massive galaxies contribute to change our vision of the nearby Universe.