Abundance Analysis of Red Horizontal Branch Stars

Details Abundance Analysis of Red Horizontal Branch Stars Abundance Analysis of Red Horizontal Branch Stars

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008osa..conf...53j&link_type=abstract

Nordic-Baltic Research Course: Observational Stellar Astrophysics. Held 11-24 August 2008 in Moletai Observatory, Lithuania. (IS

Astronomy and Astrophysics

Astrophysics

Stars: Horizontal-Branch-Stars, Stars: Abundances, Stars: Individual: Bd+09±3223, Bd+11±2998, Bd+17±3248, Hd167768

Scientific paper

During the Observational Stellar Astrophysics research course in Lithuania, we analyzed the spectra of four red horizontal branch stars obtained on the Nordic Optical Telescope and FIES spectrograph. For the analysis we used the program SIU running under IDL. Overall, the metallicity for these stars seems to be higher than what is listed in the literature. We have determined the main atmospheric parameters and abundances of C, N, O and Mg chemical elements. We were only able to get the [O/Fe] abundance for one star because of telluric lines. The abundances were compared with stellar evolutionary models, both for finding the stellar mass and to investigate how well these stars follow theoretical predictions of evolutionary abundance alterations.

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