On shear-induced turbulence in rotating stars

Details On shear-induced turbulence in rotating stars On shear-induced turbulence in rotating stars

2004-03-24

arxiv.org/abs/astro-ph/0403580v1

Astron.Astrophys. 425 (2004) 243-247

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20040279

We review various prescriptions which have been proposed for the turbulent transport of matter and angular momentum in differentially rotating stellar radiation zones. A new prescription is presented for the horizontal transport associated with the anisotropic shear turbulence which is produced by the differential rotation in latitude; this `beta-viscosity' is drawn from torque measurements in the classical Couette-Taylor experiment (Richard & Zahn 1999). Its implementation in a stellar evolution code leads to enhanced mixing, as illustrated by models of a rotating main-sequence star of 1.5 solar mass.

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