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

机译:富金属钡星样品的化学丰度和运动学

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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.
机译:目的我们确定了富金属钡星样品的大气参数和丰度模式。方法。我们使用了高分辨率光谱学。大气参数和丰度使用Kurucz的局部热力学平衡大气模型和光谱分析代码MOOG确定。结果。我们显示,恒星的增强因子[s / Fe]从0.25到1.16。它们的Na,Al,α元素和铁族元素的丰度模式以及运动学特性与已分析的其他富金属和超富金属恒星的特征相似。我们得出的结论是,富含金属的钡星不属于凸起的种群。我们还表明,富含金属的钡星是探测高金属环境中s过程富集的有用目标。

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