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Title: EFFECTS OF DUST FEEDBACK ON VORTICES IN PROTOPLANETARY DISKS

We carried out two-dimensional, high-resolution simulations to study the effect of dust feedback on the evolution of vortices induced by massive planets in protoplanetary disks. Various initial dust to gas disk surface density ratios (0.001-0.01) and dust particle sizes (Stokes number 4 × 10{sup –4}-0.16) are considered. We found that while dust particles migrate inward, vortices are very effective at collecting them. When dust density becomes comparable to gas density within the vortex, a dynamical instability is excited and it alters the coherent vorticity pattern and destroys the vortex. This dust feedback effect is stronger with a higher initial dust/gas density ratio and larger dust grain. Consequently, we found that the disk vortex lifetime can be reduced up to a factor of 10. We discuss the implications of our findings on the survivability of vortices in protoplanetary disks and planet formation.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Department of Physics and Astronomy, Rice University, Houston, TX 77005 (United States)
  2. Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
  3. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
Publication Date:
OSTI Identifier:
22364506
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 795; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; COSMIC DUST; DENSITY; FEEDBACK; HYDRODYNAMICS; INSTABILITY; PARTICLE SIZE; PLANETS; PROTOPLANETS; STOKES NUMBER; TWO-DIMENSIONAL CALCULATIONS; VORTICES