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

PEREIRA, C.B., ; SALES SILVA, J. V., ; CHAVERO, C.;; ROIG, F.; JILINSKI, E.

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Año: 2011 vol. 533 p. 1 - 21

0004-6361

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.