Abstract
The relationship between the depletions of 6Li and 7Li is studied for two models of lithium burning, below the convective zone. The parameters of the depletion models are submitted to the constraint that the slope of the 7Li theoretical depletion curve agrees with the slope of the observed depletion curve, for cool subdwarfs. Other less restrictive models are also considered. In all cases, a Li depletion less than 0.5 dex implies a 7Li depletion less than 0.1 dex. With the constraint on the slope of the 7Li curve, the depletion of 7Li for the same depletion of 6Li is below 0.05 dex.
The still unsolved problem for the true 7Li abundance in subdwarfs is the possible influence of temperature inhomogeneities, raised by Kurucz, subsequently shown to be small in the solar case, but not yet computed with the inclusion of departure from LTE for metal-poor stars.
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Cayrel, R., Lebreton, Y., Morel, P. (1999). Survival of 6Li, and 7Li, in Metal-Poor Stars. In: Spite, M. (eds) Galaxy Evolution: Connecting the Distant Universe with the Local Fossil Record. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4213-7_14
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DOI: https://doi.org/10.1007/978-94-011-4213-7_14
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