Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221...25m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, July 1, 1986, p. 25-51.
Astronomy and Astrophysics
Astronomy
16
Eddington Approximation, Stellar Evolution, Stellar Models, Stellar Rotation, Kelvin-Helmholtz Instability, Molecular Weight, Stellar Cores
Scientific paper
A previous formulation of the equations governing possible steady mixing states in a rapidly rotating, evolving Cowling model star with Eddington-Sweet (E-S) circulation is rediscussed in order to bring out explicitly the dependence on the centrifugal ratio epsilon and the ratio eta of the Kelvin-Helmholtz time to the nuclear evolution time. The earlier conclusion is confirmed that even when all but the P2 contribution to the mu field (mu is mean molecular weight) are ignored, the consequent lower limit on epislon in a uniform rotator is unrealistically large, and that only by assuming an implausible nonuniform rotation field can steady mixing of even part of the star by E-S circulation be reconciled with the limits set by hydrostatic equilibrium near the surface.
Mestel Leon
Moss D. L.
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