SPECTROSCOPIC INVESTIGATIONS OF CEPHEIDS IN CARINA

Автор(и)

  • I. A. Usenko Astronomical Observatory, Odessa National University, T.G. Shevchenko Park, Odessa 65014, Ukraine, Україна
  • L. N. Berdnikov Sternberg Astronomical Institute, Moscow University, Moscow 119899, Russia;, Російська Федерація
  • V. V. Kravtsov Sternberg Astronomical Institute, Moscow University, Moscow 119899, Russia; Universidad Catolica del Norte, Avenida Angamos 0610, Autofagasta, Chile;, Російська Федерація
  • A. Yu. Knyazev South African Large Telescope, P.O. Box 9, Observatory, Cape Town 7935, South Africa, Південна Африка
  • R. Chini Astronomisches Institut, Ruhr-Universitat Bohum, Bohum 44780, Germany; Universidad Catolica del Norte, Avenida Angamos 0610, Autofagasta, Chile;, Німеччина
  • V. H. Hoffmeister Astronomisches Institut, Ruhr-Universitat Bohum, Bohum 44780, Germany;, Німеччина
  • O. Stahl Landessternwarte, Heidelberg, Germany, Німеччина
  • H. Drass Astronomisches Institut, Ruhr-Universitat Bohum, Bohum 44780, Germany;, Німеччина

DOI:

https://doi.org/10.18524/1810-4215.2010.23.85253

Ключові слова:

Stars, Cepheids, individual, WW Car, SX Car, UZ Car, UY Car, GX Car, HW Car, YZ Car.

Анотація

Spectroscopic investigations of seven
southern CepheidsWWCar, SX Car, UZ Car, UY Car,
GX Car, HW Car and YZ Car have been performed. It
was founded out six objects have metallicities, close to
solar one and their CNO-, odd elements and Mg content
indicate that these objects are on the stage after
the first dredge-up. CepheidWWCar is an unusual objects
because it has noticeable overabundance of [C/H]
= +0.3 dex, [N/H] = +0.95 dex, whereas sodium in
deficient ([Na/H] = -0.46 dex), and magnesium content
is the largest ([Mg/H] = -0.12 dex) in comparison
with other objects from this list having close pulsation
periods.

Посилання

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Опубліковано

2010-12-02

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