Comparison between the Li 670.8 nm curves-of-growth computed with the fitting function of Sbordone et al. (2010) for [Fe∕H] = − 2.0 (colored continuous lines) and with our function FFII (black solid lines) for the 3D NLTE (left) and 1D NLTE (right) cases, respectively, and for three values of surface gravity (log g = 3.5, 4.0, and 4.5). The vertical colored dashed lines indicate the upper limits of the lithium abundance range for which the relation of Sbordone et al. (2010) is well defined (beyond these limits the fitting function is evaluated in extrapolation). Different colors denote the different effective temperatures at which the relations are evaluated (see legend in upper left panel). The black dashed line represents the upper abundance limit up to which our fitting function is defined (A(Li) = 3.0 for all temperatures).
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