On the depletion of lithium in the sun

Details On the depletion of lithium in the sun On the depletion of lithium in the sun

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264..673a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 2, p. 673-678.

Astronomy and Astrophysics

Astrophysics

30

Equations Of State, Lithium, Metallicity, Solar Spectra, Stellar Evolution, Convection, Pre-Main Sequence Stars, Stellar Models

Scientific paper

We describe evolutionary sequences of solar models starting in a fully convective phase at the Hayashi line. An overshoot layer of about 0.30 pressure scale heights is sufficient for the depletion of lithium by a factor 100. The destruction of Li occurs almost entirely during the pre-main-sequence evolution, within a period of 1.5 x 10 exp 7 yr when the star develops a radiative core and departs from the Hayashi line. For the present sun, the same overshoot layer leads to a convection zone of about 200,000 km total depth, in good agreement with the helioseismic evidence and with the needs of the solar dynamo.

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