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Table 4

[Fe/H] obtained with five different methods.

Star [Fe/H]FeIlines [Fe/H]NiI5477 Å [Fe/H]CrI5204 Å+5208 Å [Fe/H]CaII8498 Å [Fe/H]ATHOS/SP_Ace
Eq. (10) Eq. (8) Eq. (1)
HE2319-5228 −2.8 −2.7 −2.8 −2.0 −2.6
HE2250-4229 −2.7 −2.6 −2.7 −2.3 −2.5
HE2258-4427 −2.1 −2.1 −2.3 −0.6 −2.2
HE0448-4806 −2.3 −2.4 −2.7 −2.4 −2.4
HE2357-2718 −0.7 +0.2 −0.3 −0.2 +0.3

Notes. Fe I lines, our Ni 5477 Å relation, our Cr 5204 Å and Cr 5208 Å relation, and Wallerstein et al. (2012) Ca 8498 Å relation, and with ATHOS and SP_Ace.

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