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Effects of metal abundances on the evolutionary period changes of classical Cepheids

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Abstract

Theoretical values of the evolutionary period changes of classical Cepheids are calculated as functions of not only periods but also chemical abundances. It is found that the theoretical values of period changes marginally depend on metal abundances. Comparison with observed period changes of galactic Cepheids shows reasonable agreement. Small-amplitude Cepheids are discussed combined with their evolutionary states.

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  1. Astronomical Institute, Faculty of Science, Tohoku University, Sendai, Japan

    Masaya Saitou

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  1. Masaya Saitou
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Saitou, M. Effects of metal abundances on the evolutionary period changes of classical Cepheids. Astrophys Space Sci 162, 47–56 (1989). https://doi.org/10.1007/BF00653344

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  • DOI: https://doi.org/10.1007/BF00653344

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