SPECTROSCOPIC INVESTIGATIONS OF CEPHEIDS IN CARINA

I. A. Usenko, L. N. Berdnikov, V. V. Kravtsov, A. Yu. Knyazev, R. Chini, V. H. Hoffmeister, O. Stahl, H. Drass

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.

Ключові слова


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

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Посилання


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

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