ARE THE s-CEPHEIDS CROSSING THE INSTABILITY STRIP FOR THE FIRST TIME?

S. M. Andrievsky, G. A. Garbuzov, D. N. Doi

Анотація


Using the literature data on secular period changes reported for the small-amplitude Cepheids (s-Cepheids) it is shown that these stars are not crossing the instability strip for the first time. After correction of the observed pulsational chracteristics of s-Cepheids, in the diagram "log ( dP / P)100- log P" they become indistinguishable from usual classic Cepheids, which are supposed to have already crossed the instability strip more than (or at least) once.

Ключові слова


Stars; Cepheids.

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Посилання


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DOI: https://doi.org/10.18524/1810-4215.2012.25.83165

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