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Nonlinear stationary vortices in gravitating fluid
Received 1 June 1999 / Accepted 5 August 1999
The problem of nonlinear self-organization of perturbations in differentially rotating, nonuniform, gravitating systems is studied. Two types of stationary nonlinear solutions, in the form of tripolar vortices and vortex chains of gravitational potential and density, dependent on the spatial profiles of the basic state quantities, are found. They propagate with a constant velocity perpendicularly to the basic state gradients, and characteristic time scales for the creation of such vortical structures are shown to be much shorter than the corresponding intervals for gravitational contraction.
Key words: instabilities turbulence waves ISM: clouds
© European Southern Observatory (ESO) 1999
Online publication: November 16, 1999