CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): CHERNYSHOVA, I.V.; ANDRIEVSKY, S.M.; KOVTYUKH, V.V.; MKRTICHIAN, D.E.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 332-334.
- Date: 04/1998
- Title: The unusual A-star VW Ari: chemical composition revisited
- Keyword(s): STARS: INDIVIDUAL: VW ARI, STARS: CHEMICALLY PECULIAR
- Pages: 332 -- 334
Abstract:
Seven high-resolution and high S/N CCD spectra were used to derive
elemental abundances in the atmosphere of VW Ari A (T(eff)=7200,
log g=3.7) which is the primary component of a visual binary system.
The synthetic spectrum technique applied in the analysis allowed to reveal
the following feature: the atmosphere of this star is strongly deficient
in some metals, while light elements have solar-like abundances. Taking into
account these results, one can suggest that VW Ari A is a lambda Boo type
star. Another argument supporting this supposition is the following: on the
diagrams "(b-y)-c(1)", "(b-y)-m(1)" and "(b-y)-beta" VW Ari A falls exactly
in the region occupied by the lambda Boo stars. Note also, that a previous
analysis has shown that the secondary component of VW Ari has a normal
metallicity. Differences in chemical compositions of the two components
appear to be due to the specific evolution of the primary VW Ari A.
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