Fig. 16
Comparison of equivalent widths (EW) for N iiiλ4097 and λλ4640/42 for models with different background abundances, [N] = 7.78 and mass-loss rates as in Table 1. Black diamonds: Z/Z⊙ = 1.0; red triangles: Z/Z⊙ = 0.5; purple squares: Z/Z⊙ = 0.2. Background abundances scaled to solar abundance pattern from Asplund et al. (2005).
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