| Issue |
A&A
Volume 533, September 2011
|
|
|---|---|---|
| Article Number | A51 | |
| Number of page(s) | 11 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361/201117070 | |
| Published online | 26 August 2011 | |
Chemical abundances and kinematics of a sample of metal-rich barium stars⋆,⋆⋆
1
Observatório Nacional, Rua José Cristino, 77. CEP 20921-400, São
Cristóvão, Rio de
Janeiro-RJ, Brazil
e-mail: claudio@on.br; joaovictor@on.br; carolina@on.br; froig@on.br; jilinski@on.br
2
Instituto de Física, Universidade do Estado do Rio de
Janeiro, Rua São Francisco Xavier
524, Maracanã, 200550-900
Rio de Janeiro-RJ,
Brazil
3
Pulkovo Observatory, Russian Academy of Sciences,
65 Pulkovo, 196140
St. Petersburg,
Russia
Received: 12 April 2011
Accepted: 14 June 2011
Aims. We determined the atmospheric parameters and abundance pattern for a sample of metal-rich barium stars.
Methods. 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.
Results. We show that the stars have enhancement factors, [s/Fe], from 0.25 to 1.16. Their abundance pattern of the Na, Al, α-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.
Key words: stars: abundances / stars: chemically peculiar
Based on observations made with the 1.52 m and 2.2 m telescope at the European Southern Observatory (La Silla, Chile).
Tables 2 and 4 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/533/A51
© ESO, 2011
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