High-resolution spectroscopy of two metal-poor red giants: HD232078 and HD218732

An abundance analysis for 35 chemical elements based on a high-resolution (R= 67000) optical spectra of two metal-poor ([Fe/H][asymptotically =]- 1.50) halo red giants, HD232078 and HD218732, is presented. Abundances of 10 chemical elements were derived for the first time. Both red giants are chromo...

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Bibliographic Details
Published inMonthly notices of the Royal Astronomical Society Vol. 408; no. 3; p. 1452
Main Author Barzdis, A
Format Journal Article
LanguageEnglish
Published London Oxford University Press 01.11.2010
Subjects
Metals
Spectrum analysis
Stars & galaxies
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Summary:An abundance analysis for 35 chemical elements based on a high-resolution (R= 67000) optical spectra of two metal-poor ([Fe/H][asymptotically =]- 1.50) halo red giants, HD232078 and HD218732, is presented. Abundances of 10 chemical elements were derived for the first time. Both red giants are chromospherically active and optically variable, located close to the red giant branch tip. Abundances of both stars generally follow typical halo star abundance distribution, while HD218732 should have experienced a deep mixing episode and could be a first ascent asymptotic giant branch star. [PUBLICATION ABSTRACT]
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2010.17160.x