Metal-poor stars in the MW from SMSS & SAGES

Photometric stellar surveys now cover a large fraction of the sky, probe to fainter magnitudes than large-scale spectroscopic surveys, and are relatively free from the target...测光恒星巡天（Photometric stellar surveys）如今已覆盖绝大多数天区，其探测极限星等相较于大型光谱巡天（large-scale spectroscopic surveys）更为暗淡，且相对不受目标...