Séminaire Doctoral / Seminar PhD |
| « The formation of spiral structure and bars in galaxies » |
|
Simon Rozier |
| While most of the galactic disks exhibit spiral structure and bars, it is still a challenge to determine how these structures were formed, evolve and disappear. A major issue in modeling them is the complex shape of the stellar orbits. Since the 1960s, density wave theory has provided useful analytical tools to understand spirals and bars, which were later complemented by numerical simulations. I will focus on the particular analytical tool I am using, called the matrix method. Although it was developed in the 70s to study spiral structure in disk galaxies, it was later generalized to other kinds of stellar systems, and I recently extended it to rotating spheroidal systems, such as globular clusters, elliptical galaxies and dark matter halos. |
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vendredi 29 novembre 2019 - 16:00 Salle du Conseil, Institut d'Astrophysique |
| Page web du séminaire / Seminar's webpage |