Lithium abundances in main-sequence F stars and sub-giants

Jose Dias do Nascimento Jr; Sylvie Theado; Sylvie Vauclair

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Lithium abundances in main-sequence F stars and sub-giants

Jose Dias do Nascimento Jr·Sylvie Theado·Sylvie Vauclair

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Abstract

The application to main-sequence stars of the rotation-induced mixing theory in the presence of mu-gradients leads to partial mixing in the lithium destruction region, not visible in the atmosphere. The induced lithium depletion becomes visible in the sub-giant phase as soon as the convective zone deepens enough. This may explain why the observed " lithium dilution " is smoother and the final dilution factor larger than obtained in standard models, while the lithium abundance variations are very small on the main sequence.

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Jose Dias do Nascimento Jr, Sylvie Theado, Sylvie Vauclair. 2000-02-17. Lithium abundances in main-sequence F stars and sub-giants. https://arxiv.org/abs/astro-ph/0002353

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