...¹

This abundance ratio is defined as $1-\varepsilon_{\rm Si}/\varepsilon_{\rm O}$ ; see Eq.(31) of Marigo & Aringer (2009, A&A submitted)

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... (H01)²

The elemental abundances are taken from Grevesse & Sauval (1998), but for C, N, O, Ne, Mg, Si, and Fe that are modified following the revision by Howeger (2001).

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... (C09)³

The elemental abundances are taken from Grevesse & Sauval (1998), but for N, O, and Ne that are modified following the revision by Caffau et al. (2009).

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