Services on Demand
Journal
Article
Indicators
- Cited by SciELO
- Access statistics
Related links
- Similars in SciELO
Share
Revista mexicana de astronomía y astrofísica
Print version ISSN 0185-1101
Abstract
MOLINA, R. E. and RIVERA, H.. Chemical abundances for A-and F-type supergiant stars. Rev. mex. astron. astrofis [online]. 2016, vol.52, n.2, pp.399-411. ISSN 0185-1101.
We present the stellar parameters and elemental abundances of a set of A-F-type supergiant stars HD 45674, HD 180028, HD 194951 and HD 224893 using high resolution (R ≈ 42, 000) spectra taken from ELODIE library. We present the first results of the abundance analysis for HD 45674 and HD 224893. We reaffirm the abundances for HD 180028 and HD 194951 studied previously by Luck. Alpha-elements indicate that the objects belong to the thin disc population. Their abundances and their location on the Hertzsprung-Russell diagram seem to indicate that HD 45675, HD 194951 and HD 224893 are in the post-first dredge-up (post-1DUP) phase, and that they are moving in the red-blue loop region. HD 180028, on the contary, shows typical abundances of Population I, but its evolutionary status cannot be satisfactorily defined.
Keywords : stars: abundances; stars: atmospheres; stars: evolution; super-giants.