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Table 10

Average parameters for the three groups.

Parameter Group 1 rms Group 2 rms Group 3 rms

Teff(K) 8468 237 8860 367 9697 372

Y .. .. 0.363 0.076 0.328 0.072

⟨  [Fe/H]  ⟩ –1.87 0.13 –1.83 0.15 –1.63 0.13
[Sr/Fe] II –0.54 0.26 –0.54 0.26 –0.18 0.36
[N/Fe] I 0.68 0.15 1.11 0.12 1.06 0.07
[O/Fe] I 0.65 0.12 0.54 0.16 0.54 0.23
[Na/Fe] I –0.08 0.11 0.20 0.16 0.40 0.17

[Mg/Fe] I 0.73 0.19 0.72 0.11
[Mg/Fe] II 0.48 0.29 0.59 0.26 0.27 0.31
[Si/Fe] II 0.48 0.19 0.56 0.23 0.32 0.20
[Ti/Fe] II 0.35 0.15 0.43 0.17 0.51 0.15

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