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24 mars 2017 Tout le mois

Hèloïse Meheut (OCA) — Protoplanetary disks dynamics : from local to global approach.

Vendredi 24 mars 11:00-12:00 - Amphi

Abstract : Protoplanetary disks are modern alchemists, they transform dust into astronomical gold : the planets ! But this is not done with the philosopher’s stone, as we know the disks have a limited life-time. To understand this life-time and the conditions in which planets form, one has to study the long-term dynamics of these gaseous rotating structures and explain how angular momentum is transported through or out of the disk.

After introducing the scientific context, I will present numerical simulations of protoplanetary disks showing local and global mechanisms that can be active in these disks to transport angular momentum : turbulence and outflows.

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