标题： 薄盘的动力学和化学演化 显示英文标题

标题： Dynamical and chemical evolution of the thin disc

摘要： 我们的详细解析局部盘模型（JJ模型）量化了运动学性质（如速度弥散和不对称漂移）、空间参数（尺度长度和垂直密度分布）以及恒星次群体属性（年龄和丰度分布）之间的相互关系。任何一致的径向扩展盘演化模型都应预测不同分布函数及其相关性的特定特征。 大规模光谱巡天（SEGUE、RAVE、APOGEE、Gaia-ESO）允许对薄盘长期演化的显著约束。 我们讨论了构建盘模型时相关性（如α增强与金属丰度的关系）和分布函数（如[Mg/H]或[Fe/H]）的定性差异。 在JJ模型框架下，我们建立了一个局部化学富集模型，并表明薄盘中主序星和红团簇星预计存在显著的垂直梯度。 不对称漂移的Jeans分析提供了与盘径向结构的联系。 衍生出的依赖于金属丰度的径向尺度长度未来可与不同银心距离处的丰度分布相结合，以构建完整的盘模型。 我们期望能够限制薄盘内向外增长的可能情景，并表征需要显著径向迁移的那些群体。 显示英文摘要

摘要： Our detailed analytic local disc model (JJ-model) quantifies the interrelation between kinematic properties (e.g. velocity dispersions and asymmetric drift), spatial parameters (scale-lengths and vertical density profiles), and properties of stellar sub-populations (age and abundance distributions). Any consistent radial extension of the disc evolution model should predict specific features in the different distribution functions and in their correlations. Large spectroscopic surveys (SEGUE, RAVE, APOGEE, Gaia-ESO) allow significant constraints on the long-term evolution of the thin disc. We discuss the qualitative difference of correlations (like the alpha-enhancement as function of metallicity) and distribution functions (e.g. in [Mg/H] or [Fe/H]) for the construction of a disc model. In the framework of the JJ-model we build a local chemical enrichment model and show that significant vertical gradients for main sequence and red clump stars are expected in the thin disc. A Jeans analysis of the asymmetric drift provides a link to the radial structure of the disc. The derived metallicity-dependent radial scale-lengths can be combined in the future with the abundance distributions at different Galactocentric distances to construct full disc models. We expect to be able to constrain possible scenarios of inside-out growth of the thin disc and to characterise those populations, which require significant radial migration.