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On the pulsation amplitude of cepheid variables

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Abstract

On the basis of more abundant data a relation logPΔV/logΔR for cepheid variables (Fernie, 1965) is constructed. A linear relation between logP ΔV and logΔR for classical cepheids is found, which perhaps has a break at ΔR=10R ⊙. On the logΔR/logP diagram thes-cepheids (Efremov, 1968) show a distinct sequence. Alls-cepheids present a relative variation of the radii ΔR/R≤≤0.075. The existence of non-s-cepheids with ΔR/R≤0.075 raises a point about the evolutionary place of these stars (see Efremov, 1968). One could suppose that cepheids with logP>1.1 pulsate in the first overtone.

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Authors and Affiliations

  1. Dept. of Astronomy, University of Sofia, Bulgaria

    N. Nikolov & Ts. Tsvetkov

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  1. N. Nikolov
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  2. Ts. Tsvetkov
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Nikolov, N., Tsvetkov, T. On the pulsation amplitude of cepheid variables. Astrophys Space Sci 16, 445–450 (1972). https://doi.org/10.1007/BF00642344

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  • DOI: https://doi.org/10.1007/BF00642344

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