THREE CEPHEIDS IN GALACTIC OPEN CLUSTERS: CHEMICAL COMPOSITION AND EVOLUTION

Автор(и)

  • I. A. Usenko Astronomical Observatory, Odessa National University, T.G.Shevchenko Park, Odessa 65014, Ukraine, Ukraine
  • V. V. Kovtyukh Astronomical Observatory, Odessa National University, T.G.Shevchenko Park, Odessa 65014, Ukraine, Ukraine

DOI:

https://doi.org/10.18524/1810-4215.2001.14.99503

Ключові слова:

Stars, abundances, stars, Cepheids in open clusters, individual, CF Cas, DL Cas, WZ Sgr.

Анотація

Three classical Cepheids in galactic open clusters (CF Cas, DL Cas and WZ Sgr) were investigated, using high-resolution CCD spectra. Their Teff and EB-V estimations have a good agreement with photometrically determined ones. CF Cas and DL Cas have metallicity values, close to those of the Sun, whereas WZ Sgr has overabundant metallicity content with Z=0.029. Chemical abundance data show that they are the post first dredge-up stars. C and O content and ages have a good agreement with the theoretically predicted values. All these objects have a good fit with the PL relation for galactic Cepheids.

Посилання

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Опубліковано

2017-04-20

Номер

Том 14 (2001)

Розділ

Статті

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Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року