Séminaire Univers / |
| « On the causal origin of the angular momentum and properties of dark matter halos and galaxies » |
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Corentin Cadiou |
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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 properties (galaxy morphology, halo concentration). These relations are however statistical in nature, as no two galaxies share the same formation history. I will present an alternative approach to draw causal links instead of statistical ones. Indeed, by carefully modifying the initial conditions of cosmological simulations, one can control the subsequent formation of halos and galaxies in the simulation, thus allowing one to conduct controlled numerical experiments. Using this approach, I will present fundamental results on the origin of the angular momentum and concentration parameter of dark matter halos, before presenting preliminary results on the angular momentum of galaxies.
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mardi 23 novembre 2021 - 11:15 Salle 281 Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |