Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...265...55c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 1, p. 55-64.
Astronomy and Astrophysics
Astrophysics
38
F Stars, Main Sequence Stars, Stellar Rotation, Subgiant Stars, Globular Clusters, Lithium, Stellar Evolution, Stellar Models, Turbulence Effects
Scientific paper
The observations of lithium in F type main-sequence stars and subgiants can lead to specific constraints on the rotation-induced mixing. The fact that lithium is smoothly depleted in subgiants down to factors as large as 1000 at the end of the sequence can be explained if lithium suffered extra-depletion inside the star while it was on the main-sequence. We propose a simple consistent model which could account for these observations, as well as the observations of lithium on the main sequence. This model is based on the discussion of rotation-induced mixing developed by Chaboyer and Zahn 1992. We are lead to suggest new theoretical studies of the hydrodynamical process which occur in rotating stars.
Charbonnel Corinne
Vauclair Sylvie
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