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Abundance analysis of barium stars

Published online by Cambridge University Press:  06 January 2014

Guochao Yang ,
Yanchun Liang ,
Wenyuan Cui  and
Bo Zhang
Guochao Yang
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China, email: [email protected], [email protected] Department of Physics, Hebei Normal University, Shijiazhuang 050024, China
Yanchun Liang
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China, email: [email protected], [email protected]
Wenyuan Cui
Affiliation:
Department of Physics, Hebei Normal University, Shijiazhuang 050024, China
Bo Zhang
Affiliation:
Department of Physics, Hebei Normal University, Shijiazhuang 050024, China
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Abstract

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We obtained the chemical abundances of more than 20 Barium (Ba) stars by analysing high resolution echelle spectra. They show obvious overabundances of neutron capture process elements, such as Y, Zr, Ba, La and Eu. Their abundance pattern can be explained by binary accretion through stellar wind, where the Ba stars have accreted the ejecta from the companion stars which were in AGB stages at that time and now evolve as white dwarfs.

Keywords

Stars: abundancesStars: atmospheresStars: chemically peculiarStars: late-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S298: Setting the scene for Gaia and LAMOST , May 2013 , pp. 451
Copyright
Copyright © International Astronomical Union 2014 

References

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