Chemical abundances and kinematics of a sample of metal-rich barium stars

Details Chemical abundances and kinematics of a sample of metal-rich barium stars Chemical abundances and kinematics of a sample of metal-rich barium stars

2011-08-11

arxiv.org/abs/1108.2500v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

21 pages, 9 figures, accepted for publication in in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361/201117070

We determined the atmospheric parameters and abundance pattern for a sample of metal-rich barium stars. We used high-resolution optical spectroscopy. Atmospheric parameters and abundances were determined using the local thermodynamic equilibrium atmosphere models of Kurucz and the spectral analysis code MOOG. We show that the stars have enhancement factors, [s/Fe], from 0.25 to 1.16. Their abundance pattern of the Na, Al, alpha-elements, and iron group elements as well as their kinematical properties are similar to the characteristics of the other metal-rich and super metal-rich stars already analyzed. We conclude that metal-rich barium stars do not belong to the bulge population. We also show that metal-rich barium stars are useful targets for probing the s-process enrichment in high-metallicity environments.

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