Fig. 12.
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Evolution of N/O as a function of O/H ratios for stellar models in the metallicity range of 0 ≤ Z ≤ 0.020 (coloured curves) and observed abundances of the Milky Way’s stars (grey points). Yields from models with different initial rotations were used (see Sect. 6.3). The observed data were taken from the SAGA database (Suda et al. 2008, 2011; Yamada et al. 2013). The yellow star represent the Sun’s abundances from Asplund et al. (2009).
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