6533b852fe1ef96bd12aab98
RESEARCH PRODUCT
High-resolution spectroscopy of two metal-poor red giants: HD 232078 and HD 218732
A. Barzdissubject
Red-giant branchPhysicsStarsSpace and Planetary ScienceGalaxy formation and evolutionAsymptotic giant branchAstronomyAstronomy and AstrophysicsAstrophysicsHaloA-type main-sequence starSpectroscopyO-type main-sequence stardescription
An abundance analysis for 35 chemical elements based on a high-resolution (R = 67 000) optical spectra of two metal-poor ([Fe/H] ≈ - 1.50) halo red giants, HD 232078 and HD 218732, 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 HD 218732 should have experienced a deep mixing episode and could be a first ascent asymptotic giant branch star.
year | journal | country | edition | language |
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2010-09-28 | Monthly Notices of the Royal Astronomical Society |