Dusty vortices in protoplanetary disks

Satoshi Inaba, P. Barge

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Global two-dimensional simulations are used to study the coupled evolution of gas and solid particles in a Rossby unstable protoplanetary disk. The initial radial bump in density is unstable to the formation of Rossby waves, which roll up and break into anticyclonic vortices that gradually merge into a large-scale vortical structure persisting for more than 100 rotations. Conditions for the growth of such vortices may naturally appear at the outer edge of the "dead zone" of a protoplanetary disk where gas tends to pile up. We find that solid particles are captured by the vortices and change the evolution: (1) large particles rapidly sink toward the center of the vortices and increase the solid-to-gas ratio by an order of magnitude, (2) solid particles tend to reduce the lifetime of the vortices, and (3) solid particles are effectively confined in the vortices before they are dispersed by the Keplerian shear flow. These results confirm that in a minimum mass solar nebula, persistent vortices could be good places for the formation of the planetesimals or the rocky cores of gas giant planets as soon as particles reach boulder size.

Original languageEnglish
Pages (from-to)415-427
Number of pages13
JournalAstrophysical Journal
Volume649
Issue number1 I
DOIs
Publication statusPublished - 2006 Sep 20

Fingerprint

protoplanetary disks
vortex
vortices
gas
gases
gas giant planets
solar nebula
protoplanets
planetesimal
shear flow
Rossby wave
piles
boulder
sinks
planetary waves
pile
planet
life (durability)
solid particle
simulation

Keywords

  • Hydrodynamics
  • Methods: numerical
  • Planetary systems: protoplanetary disks
  • Solar system: formation

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Dusty vortices in protoplanetary disks. / Inaba, Satoshi; Barge, P.

In: Astrophysical Journal, Vol. 649, No. 1 I, 20.09.2006, p. 415-427.

Research output: Contribution to journalArticle

Inaba, Satoshi ; Barge, P. / Dusty vortices in protoplanetary disks. In: Astrophysical Journal. 2006 ; Vol. 649, No. 1 I. pp. 415-427.
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