银河系金属丰度及其演化研究新进展

摘要

The average values of metallicity in the disk, the halo, andGalactic bulge are -0.2, -1.6, and -0.2 dex respectively. Theage-metallicity relation (AMR) provides useful clues about theGalactic formation and evolution. In order to explain observedAMR and its scatter, mechanisms of diffusion of stellar orbitsand non-instantaneous mixing must be considered in Galacticchemical evolution models.%银河系的银盘、银晕、核球的平均金属丰度为-0.2，-1.6，-0.2。年龄--金属丰度关系给出了银河系形成和演化的线索。为了解释观测的年龄--金属丰度关系及其弥散，银河系化学演化模型必须考虑恒星轨道运动、非瞬时混合等机制。