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Fig. 6

image

Comparison of the abundance ratios NO/NNe (top panel) and NFe/NNe (bottom panel) obtained from the broadband fit with ISMabs for all the analysed sources. The best fitted Nx/NNe ratio for all sources is plotted with a solid red line. Ratios obtained from Grevesse & Sauval (1998), Asplund et al. (2009), Lodders et al. (2009) and Juett et al. (2004) are respectively shown with green, blue, orange and magenta dashed lines.

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