Simulations of dust-trapping vortices in protoplanetary discs

Details Simulations of dust-trapping vortices in protoplanetary discs Simulations of dust-trapping vortices in protoplanetary discs

2003-10-02

arxiv.org/abs/astro-ph/0310059v2

Astron.Astrophys.417:361-374,2004

Astronomy and Astrophysics

Astrophysics

15 pages, 13 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20034417

Local three-dimensional shearing box simulations of the compressible coupled dust-gas equations are used in the fluid approximation to study the evolution of different initial vortex configurations in a protoplanetary disc and their dust-trapping capabilities. The initial conditions for the gas are derived from an analytic solution to the compressible Euler equation and the continuity equation. The solution is valid if there is a vacuum outside the vortex. In the simulations the vortex is either embedded in a hot corona, or it is extended in a cylindrical fashion in the vertical direction. Both configurations are found to survive for at least one orbit and lead to accumulation of dust inside the vortex. This confirms earlier findings that dust accumulates in anticyclonic vortices, indicating that this is a viable mechanism for planetesimal formation.

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