Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...113..261k&link_type=abstract
Astronomy and Astrophysics, vol. 113, no. 2, Sept. 1982, p. 261-268. Research supported by the Alfred P. Sloan Foundation.
Astronomy and Astrophysics
Astrophysics
39
Angular Momentum, Flow Stability, Rotating Fluids, Stellar Rotation, Stellar Winds, Baroclinic Instability, Buoyancy, Rayleigh Waves, Shear Flow, Stellar Evolution, Thermal Diffusion, Viscosity
Scientific paper
Consideration of the conditions for the occurrence of hydrodynamic instabilities in differentially rotating, stably stratified stars leads to the suggestion that under normal stellar conditions, buoyancy is strong enough to suppress baroclinic instabilities. Shear instability is important for angular momentum transport across constant pressure surfaces in rapidly rotating stars, as well as the thin shear layers of slow rotators. The evolution of the angular momentum distribution through the Golreich-Schubert-Fricke instability is sketched for the case of a star which is slowly spun down by a stellar wind torque. The evolution is toward a state in which angular momentum is nearly constant on equipotentials.
Knobloch Eberhard
Spruit Hendrik C.
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