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Fig. 1


Abundance corrections caused by the direct (top), indirect (middle), and joint (bottom) actions of the surface dynamo magnetic fields on the determination of the solar carbon abundance. The joint effect represents the sum of ΔA values shown in the top and middle panels. The abundance corrections are given against the mean line-center optical depths of the C i lines. The mean of the abundance corrections ⟨ΔA and the corresponding r.m.s. values are shown in the right corner of each panel. Our results for the weak C i lines are indicated by squares. Crosses and circles represent moderate and strong lines. For the same formation heights, the lines marked by crosses have approximately twice lower ΔλB values than the lines marked by circles. Red and blue symbols show the lines with the EPL < 7.5 eV and EPL > 8.5 eV.

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