Formation of Giant Planets by Concurrent Accretion of Solids and Gas   inside an Anti-Cyclonic Vortex
  We study the formation of a giant gas planet by the core--accretion gas--capture process, with numerical simulations, under the assumption that the planetary core forms in the center of an anti-cyclonic vortex. The presence of the vortex concentrates particles of centimeter to meter size from the surrounding disk, and speeds up the core formation process. Assuming that a planet of Jupiter mass is forming at 5 AU from the star, the vortex enhancement results in considerably shorter formation times than are found in standard core--accretion gas--capture simulations. Also, formation of a gas giant is possible in a disk with mass comparable to that of the minimum mass solar nebula. 
Hubert Klahr (1) and Peter Bodenheimer (2) ((1)Max-Planck-Institut   fuer Astronomie, Heidelberg, (2) UCO/Lick Observatory, ...