Dust back-reaction stops the gas accretion at the snowline
Abstract
In protoplanetary disks, the water snowline can act as a traffic jam for drifting dust particles, leading to high dust-to-gas ratios in the inner regions. Using numerical simulations that include dust growth, evaporation and condensation of water, and the dust back-reaction onto the gas, we find that the dust concentration around the snowline can stop the accretion of light gases (such as hydrogen and helium), and further enhance the accumulation of solid material in the inner disk. The back-reaction effects stop once the reservoir of dust particles from the outer disk is exausted (in approximately 1 Myr), and never take place if the disk turbulence is high, or if the primordial dust content is low.
- Publication:
-
AAS/Division for Extreme Solar Systems Abstracts
- Pub Date:
- August 2019
- Bibcode:
- 2019ESS.....432405G