Oral Presentation

Type-II planet-disk interaction with a magnetized disk wind

Author(s): Yuhiko Aoyama (Tsinghua University) and Xuening Bai (Tsinghua University)

Presenter: Yuhiko Aoyama (Tsinghua University)

Planet-disk interaction is the standard paradigm for understanding planet migration and interpreting ring-like disk substructures. In the type-II regime, the gap-opening process is a competition between the gravitational torque generated by the planet and torques from physical processes in the parent protoplanetary disk. However, while it has recently been established that magnetized disk winds dominate disk angular momentum transport, existing numerical studies were almost exclusively conducted under the viscous disk framework without explicitly incorporating magnetic fields. We conduct 3D non-ideal magnetohydrodynamic (MHD) simulations of planet-disk interaction in the presence of an MHD wind. We show that poloidal magnetic flux spontaneously concentrates into the planet-induced gap. It strongly enhances the MRI turbulence in the gap region, and also makes the gap deeper and wider than the case assuming a viscous disk with a similar level of turbulence.