LAMOST特殊恒星的高分辨率光谱后续观测与研究

对化学丰度和运动学异常恒星的细致分析是追踪在银河系演化历史中发生的一些特殊物理过程的有效途径。 该项目将对LAMOST巡天中探测到的化学丰度和运动学异常的恒星进行高分辨率光谱后续观测，对它们进行精细的元素丰度分析，揭示它们的起源，从而更好地理解银河系的演化图像，并促进银河系化学演化模型的完善与优化。具体地，我们将研究对LAMOST低分辨率光谱巡天中探测到的运动学团块的成员星和高[alpha/Fe]比率的富金属星进行高分辨率光谱观测。这两类恒星的确认和样本扩充可以帮助我们追踪银河系的并合历史和银盘恒星的径向迁移效应。

The study of kinematic and chemical peculiar stars provides a powerful way to trace some special progress during the Galactic evolution. This project will carry out high resolution observation and chemical analysis for such peculiar stars selected from the LMAOST survey in order to understand their origins, which will improve our knowledge of the Galactic evolution and help to construct the chemical evolution models. Specifically, we focus on two kinds of stars, members of kinematic groups and metal-rich stars with high [α/Fe] ratios, detected by LAMOST low resolution spectra. The identifications and the increase of their sample sizes are important for probing the merging history of our Galaxy and the migration effect of the Galactic disk.