The Role of Vortices in the Formation of the Solar System: the Effect on Dust Particles

Details The Role of Vortices in the Formation of the Solar System: the Effect on Dust Particles The Role of Vortices in the Formation of the Solar System: the Effect on Dust Particles

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997dps....29.2815m&link_type=abstract

American Astronomical Society, DPS meeting #29, #28.15; Bulletin of the American Astronomical Society, Vol. 29, p.1027

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Numerical calculations show that a long-lived, robust vortex can persist in the solar nebula. The stable vortex has a negative vorticity (relative to the orbital angular velocity), which is the same sign as the Keplerian shear. If several negative vortices are close to each other, they will merge to form a larger vortex. Dust particles suspended in the gas will tend to be expelled from a positive (unstable) vortex and drawn into a negative vortex. A microns -sized particle will be mostly locked with the vortex, with a small drift component. A cm-sized particle will drift faster, reaching the middle of the vortex in about 100-1000\ yrs. The differential drift velocity increases the number of collisions, enhancing aggregation into larger particles.

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