【摘要】 自20世纪80年代开始的观测表明,银河系存在厚盘结构,但其形成机制至今还是一个没有解决的问题。近年来很多工作发现,厚盘恒星的α元素丰度随金属丰度的变化趋势与薄盘不同, 这种不同还表现在Al、Mn、Zn、中子俘获元素等其他元素上。结合年龄、运动学参数研究, 恒星元素丰度可以对银河系厚盘形成机制提供观测依据。更多还原

【Abstract】 The existence of thick disk in our Galaxy was first revealed by observations in 1980’s, but how it forms is still unresolved. Recent observations show that the abundance patterns of α-elements in the thin and thick disk are distinct, and this difference also appear for some other elements, such as Al, Mn, Zn and neutron-capture elements. A comprehensive study in stellar elemental abundances, age and kinematics will be able to refine and constrain various models of Galactic thick disk formation.更多还原