Gap opening in protoplanetary discs: gas dynamics from global axisymmetric non-ideal MHD simulations with consistent thermochemistry

Recent high angular resolution ALMA observations have revealed numerous gaps in protoplanetary disks. A popular interpretation has been that planets open them. Most previous investigations of planet gap-opening concentrated on viscous Here, we carry out 2D (axisymmetric) global simulations gap opening by a wind-launching non-ideal MHD disk with consistent thermochemistry. We find strong concentration poloidal magnetic flux the planet-opened gap, where gas dynamics are magnetically dominated. The field also drives fast (nearly sonic) meridional circulation denser regions near inner and outer edges which may be observable through high-resolution molecular line observations. is more ionized than its surrounding regions, better field-matter coupling. In particular, it much higher abundance ion HCO$^+$, well-studied AS 209 prominent motions reaching local sound speed. Finally, provide fitting formulae for ambipolar Ohmic diffusivities as function density, can used future 3D disks thermochemistry too computationally expensive to evolve self-consistently magneto-hydrodynamics.