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Parameters and abundances for 451 stars of spectral types F, G, and K of luminosity classes I and II have been derived. Absolute magnitudes and E(B − V) have been derived for the warmer stars in order to investigate the galactic abundance gradient. The value found here: dFe/H/dR ∼ −0.06 dex kpc−1, agrees well with previous determinations. Stellar evolution indicators have also been investigated with the derived C/O ratios indicating that standard CN processing has been operating. Perhaps the most surprising result found in these supposedly relatively young intermediate-mass stars is that both O/Fe and C/Fe show a correlation with Fe/H much the same as found in older populations. While the stars were selected based on luminosity class, there does exist a significant Fe/H range in the sample. The likely explanation of this is that there is a significant range in age in the sample; that is, some of the sample are low-mass red-giant stars with types that place them within the selection criteria.
R. E. Luck (Fri,) studied this question.
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