Résumé / Abstract Seminaire_IAP
« Dynamics of planet-forming discs : the role of magnetised winds »

Geoffroy Lesur
Institut de Planétologie et d'Astrophysique de Grenoble (Grenoble, France)

The planet-forming region of protoplanetary disks is cold, dense, and therefore weakly ionised. For this reason, MHD turbulence is thought to be mostly absent, and another mechanism has to be found to explain gas accretion. It has been proposed that magnetised winds, launched from the ionised disk surface, could drive accretion in the presence of a large-scale magnetic field. The efficiency and the impact of these winds on the disk structure is still highly uncertain.

In this talk, I will review the most recent development in the modelling of these object, emphasising the role played by non-ideal MHD effects and magnetised winds on accretion and the formation of large structures. I will show how these models could explain several observed features which cannot be captured by classical turbulent disc models.
vendredi 20 novembre 2020 - 11:00
Webinaire, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage