Abundances of halo early-type stars

We present echelle (R~40,000) spectroscopic observations for a sample of apparently normal, high Galactic latitude, early-type stars drawn from the Palomar-Green Survey. The...本研究报道了一批取自帕洛玛-格林巡天（Palomar-Green Survey）的表观正常、高银纬早型星样本的阶梯光栅（echelle）光谱观测，其光谱分辨率R≈40000。The...