CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA

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dc.contributor.authorUsenko, I. A.
dc.contributor.authorKniazev, A. Yu.
dc.contributor.authorBerdnikov, L. N.
dc.contributor.authorKravtsov, V. V.
dc.date.accessioned2014-03-29T01:46:55Z
dc.date.available2014-03-29T01:46:55Z
dc.date.issued2013
dc.descriptionOdessa Astronomical publications / Одесская астроном. обсерватория . – Одесса : Астропринт, 2013 . – Vol.26/1.uk
dc.description.abstractFour high-resolution spectra of the doble-mode Cepheid U TrA have been obtained during its pulsational period. For the first time, we obtained accurate atmosphere parameters and the chemical abundance of a number of elements, in particular of sodium, magnesium, and aluminium. We estimated the mean Teff = 6085 29 K, log g = 2.00 0.15, and Vt = 3.90 0.25 kms -1 . A deficit of carbon ([C=H] = –0.35 0.23 dex), overabundance of both sodium ([Na=H] = +0.15 0.25 dex) and aluminium ([Al=H] = +0.30 0.32 dex) are typical for Cepheids passing through the first dredge-up phase. The abundance of iron ([Fe=H] = +0.01 0.15 dex) is very close to the solar one. Moreover, we find that -elements, those of Fe-group, as well as ”light”- and ”heavy”-, s- and rprocess elements, all of them have abundances close to solar values, too, excepting maybe several elements with slight enhance or deficit.uk
dc.identifier.citationOdessa Astronomical Publicationsuk
dc.identifier.urihttps://dspace.onu.edu.ua/handle/123456789/4785
dc.language.isoenuk
dc.publisherAstroprintuk
dc.relation.ispartofseries;vol. 26, issue 1, p. 127-130
dc.subjectdoble-mode Cepheid U TrAuk
dc.subjectpulsational perioduk
dc.subjectchemical abundanceuk
dc.subjectFe-groupuk
dc.titleCHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRAuk
dc.typeArticleuk
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Odesa Astronomical Publications