Kelvin-Helmholtz instability in dusty rings of protoplanetary disks

In the recent years, high spatial resolution observations of protoplanetary disks (PPDs) by ALMAhave revealed many details that are providing interesting constraints on the disk physics as well asdust dynamics, both of which are essential for understanding planet formation. We carry out high-resolution, 2D global hydrodynamic simulations, including the effects of dust feedback. We find thatKelvin-Helmholtz like instability can occur in PPDs which lead to both the quasi-axisymmetric ringsand non-asymmetric dust traps. In particular, we find out the quasi-axisymmetric dust rings couldprovide several observational signatures that can be tested. These effects are providing additionalunderstanding of dust dynamics in PPDs. We also produce synthetic dust emission images using oursimulation results and discuss the comparison between simulations and observations.