Title
Gas dynamics and planet formation in the outer protoplanetary disks
Reporter
白雪宁，清华大学
Description
The prevalence of disk substructures, as a major observational revolution over the past few years, calls for new perspectives in our understanding of the gas dynamics of protoplanetary disks and planet formation. I will start by introducing the central role of magnetic field in driving disk dynamics and evolution, and the framework of magnetized disk winds. By focusing on the most observable disk outer regions, I will first show that magnetism in outer disk conditions leads to weak turbulence and stochastic magnetic flux concentration that naturally leads to the formation of ring-like substructures. Next, I will show that such weakly turbulent dust rings can be natural sites for planetesimal formation, despite that the streaming instability is unlikely to operate. Finally, I will present global simulations of planet-disk interaction in weakly turbulent windy disks, where magnetic flux concentrates in the planet-induced gap that drives fast flow through the gap, leading to distinct features in gap morphology and gas kinematics
Start Time
May 26, 2023, 1:30 p.m.
End Time
Place
紫金港校区西区海纳苑8栋324教室