The data for Photometric metallicities of 14.5 million metal-poor stars from Gaia XP spectra

This catalog contains photometric metallicities for ~14.5 million metal-poor stars based on Gaia DR3 XP spectra. Key parameters include equatorial coordinates, distance, E(B−V) , intrinsic colors ( (GBP−GRP), (m-GBP ) ), predicted [Fe/H] values with errors, and dwarf/giant classification flags. This dataset serves as a powerful resource for investigating the early formation and evolutionary history of the Milky Way。本星表基于盖亚第三批数据发布（Gaia DR3）的XP光谱（XP spectra），为约1450万颗贫金属星提供测光金属丰度数据。其核心参数包括赤道坐标、距离、色余E(B−V)、本征色指数(GBP−GRP)、(m−GBP)、带误差的预测[Fe/H]值，以及矮星/巨星分类标记。本数据集可作为研究银河系早期形成与演化历史的重要科研资源。