Estimating ages for a large number of giants is of great importance for studying Galactic evolution.In this work,we dete......

The Galactic halo is supposed to form from merging with nearby dwarf galaxies.In order to probe different components of ......

贫金属星的元素丰度随着观测技术的提高,数据越来越丰富,为贫金属星的元素核合成理论和星系化学演化的研究提供了重要条件.以三种......