Penetration of the molecular-weight barrier

Details Penetration of the molecular-weight barrier Penetration of the molecular-weight barrier

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213..157h&link_type=abstract

Astrophysical Journal, Part 1, vol. 213, Apr. 1, 1977, p. 157-164.

Astronomy and Astrophysics

Astrophysics

25

Boundary Layers, Molecular Weight, Stellar Envelopes, Stellar Evolution, Stellar Rotation, Convective Flow, Cores, Penetration, Radial Flow, Stellar Models, Stellar Structure

Scientific paper

The penetration of meridional currents from the radiative envelope of a rotating star into a core with a molecular-weight barrier (mu-barrier) is investigated using a plane-parallel model constrained by numerous simplifying assumptions. The circulation time in the presence of mu-gradients is calculated along with the penetration depth of the motions into the region with stabilizing mu-gradients, and the response of the core is analyzed. The results suggest that a mu-barrier can be penetrated and that allowance must be made for some rotational mixing. A scheme is developed for including the effects of such mixing in calculations of stellar evolution.

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