Simulations of dust-trapping vortices in protoplanetary discs

被引:107
作者
Johansen, A
Andersen, AC
Brandenburg, A
机构
[1] NORDITA, DK-2100 Copenhagen, Denmark
[2] Univ Copenhagen, NBIfAFG, Astron Observ, DK-2100 Copenhagen, Denmark
来源
ASTRONOMY & ASTROPHYSICS | 2004年 / 417卷 / 01期
关键词
solar system : formation; accretion; accretion discs; hydrodynamics; instabilities; methods : numerical; turbulence;
D O I
10.1051/0004-6361:20034417
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
引用
收藏
页码:361 / 374
页数:14
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