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

Автор(и)

  • S. M. Andrievsky Department of Astronomy and Astronomical Observatory, Odessa National University, Shevchenko Park, 65014 Odessa, Ukraine; GEPI, Observatoire de Paris-Meudon, F-92125 Meudon Cedex, France, Ukraine
  • G. A. Garbuzov Department of Astronomy and Astronomical Observatory, Odessa National University, Shevchenko Park, 65014 Odessa, Ukraine),, Ukraine
  • D. N. Doi Odessa National Maritime University, Ukraine

DOI:

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

Ключові слова:

Stars, Cepheids.

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.

Посилання

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Опубліковано

2012-11-15

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