疏散星团在近红外波段的巨星支斜率与[Fe/H]的关系以及半人马座矮球状星系中心的金属丰度（英文）

The Giant Branch Slope-[Fe/H] Relation of Open Clusters in Near-Infrared and the Metallicity of the Center of the Sagittarius Dwarf Spheroidal Galaxy

导出了疏散星团在近红外波段的巨星支斜率与[Fe／H]的关系。将这一关系应用于半人马座矮球状星系的中心，得到了金属丰度[Fe／H]=-0．13士0．09。这一富金属星族的存在表明，在几十亿年前，这个星系经历了一次恒星形成过程。

A giant branch slope-[Fe/H] relation of open clusters in near-infrared is derived. Applying this relation to the center of the Sagittarius dwarf spheroidal galaxy （Sgr dSph）, a metallicity [Fe/H]= -0.13 ± 0.09 is derived. This metal-rich population suggests that there is a star formation episode in Sgr dSph within last a few Gyrs.