MULTIPHASE SPECTROSCOPIC OBSERVATIONS OF THE LONG-PERIOD CEPHEIDS l CARINAE

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dc.contributor.authorUsenko, I. A.
dc.contributor.authorKravtsov, V. V.
dc.contributor.authorKovtyukh, Valery V.
dc.contributor.authorBerdnikov, L. N.
dc.contributor.authorKniazev, A. Yu.
dc.contributor.authorChini, R.
dc.contributor.authorFokin, A. B.
dc.date.accessioned2014-03-29T01:38:10Z
dc.date.available2014-03-29T01:38:10Z
dc.date.issued2013
dc.descriptionOdessa Astronomical publications / Одесская астроном. обсерватория . – Одесса : Астропринт, 2013 . – Vol.26/1.uk
dc.description.abstractThirty three spectra (one spectrum for the each of 33 observational nights) have been performed to cover all pulsational period of the 35.5-days Cepheid l Car. Due to these data we have obtained for the first time the detailed curves of effective temperature, gravity and turbulent velocity. Curves of gravity and turbulent velocity show complicated changes, connceted probably with dynamics of extensive Cepheid’s atmosphere. The mean atmosphere parameters of l Car are: Teff = 4984 15 K; log g = 1.13; Vt = 6.67 km s−1. Having a solar metallicity [Fe/H] = +0.02 dex, this Cepheid demonstrate sudden results for the ”key” elements abundances of yellow supergiants evolution, – all they are close to the solar ones. In this case l Car resembles to SV Vul, – Cepheid with 45-days pulsational period and nearly like spectral type. It is possible that l Car is an object crossing the Cepheids instability strip for the first time. The content of other elements is close to solar one too.uk
dc.identifier.citationOdessa Astronomical Publicationsuk
dc.identifier.urihttps://dspace.onu.edu.ua/handle/123456789/4784
dc.language.isoenuk
dc.publisherAstroprintuk
dc.relation.ispartofseries;vol. 26, issue 1, p. 123-126
dc.subjectStarsuk
dc.subjectCepheids starsuk
dc.subjectindividualuk
dc.subjectl Caruk
dc.titleMULTIPHASE SPECTROSCOPIC OBSERVATIONS OF THE LONG-PERIOD CEPHEIDS l CARINAEuk
dc.typeArticleuk
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Odesa Astronomical Publications