Instabilities due to Dust-Gas Interactions in Protoplanetary Disks

In the recent years, high spatial resolution observations of such disks by ALMA have revealed many details that are providing interesting constraints on the disk physics as well as dust dynamics, both of which are essential for understanding planet formation. We carry out high-resolution, 2D and 3D hydrodynamic simulations of global disks, including the effects of dust feedback. We find that a variety of instabilities can occur in PPDs which lead to both the quasi-axisymmetric rings and non-asymmetric dust traps. In particular, we find that quasi-axisymmetric dust rings can be subject to a new instability due to dust-gas interactions and this could provide several observational signatures that can be tested. These effects are providing additional understanding of dust dynamics in PPDs. We also produce synthetic dust emission images using our simulation results and discuss the comparison between simulations and observations. 

Hui Li
Los Alamos National Laboratory
KIAA-PKU Auditorium
Thursday, November 1, 2018 - 4:00pm to 5:00pm