High-resolution spectra of the F5 I β supergiant α Per and three dwarfs belonging to the α Per cluster were obtained in order to search for systematic differences in the abundances. Using LTE analyses of the spectroscopic data we have found that [Fe/H] is about 0.3-0.5 dex smaller for α Per as compared to the dwarfs, which we ascribe primarily to non-LTE effects in the analysis of α Per. If this result is confirmed, then it will be necessary to correct LTE abundance analyses that have been performed on supergiants. Surprisingly, our estimate for the mean value of [Fe/H] for the dwarfs is 0.17±0.06 dex; this value is significantly larger than the accepted value for the cluster, about [Fe/H]=0.04. While we have not been able to determine the source of this discrepancy, there is some evidence that it is due to chromospheric activity.
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González et al. (1996) studied this question.