Abstract
The elemental abundances, temperatures, gravities and microturbulence velocities were derived for 14 non-variable supergiants from the Cepheids' instability strip and two hotter supergiants. For 8 stars the abundances were determined for the first time. The comparable analysis of the program stars' chemical composition and that of the small-amplitude Cepheids has shown that there is no essential differences in the elemental abundances for two stellar groups. Some discussion of the phenomenon of non-variable supergiants in the instability strip is given.
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Andrievsky, S.M., Kovtyukh, V.V. The comparable analysis of the Cepheids and non-variable supergiants from the instability strip.I. Astrophys Space Sci 245, 61–80 (1996). https://doi.org/10.1007/BF00637803
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DOI: https://doi.org/10.1007/BF00637803