Fig. 9
Mg II and Fe II abundances against (top panels) the angle away from the dominant ionizing star ϵ CMa and (bottom panels) | Δl | from l = 100°, representing a proxy for the 975Å radiation field of Frisch et al. (2012). The correlations visible in Figure 8 are not apparent here, showing that there is no evidence that the abundance variations are related to ionization effects.
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