The DESI Milky Way Survey (MWS) will observe ≥8 million stars between 16<r<19 mag, supplemented by observations of brighter targets under poor observing conditions. The survey will permit an accurate determination of stellar kinematics and population gradients, characterize diffuse substructure in the thick disk and stellar halo, enable the discovery of extremely metal-poor stars and other rare stellar types, and improve constraints on the Galaxy’s 3D dark matter distribution from halo star kinematics. MWS will also enable a detailed characterization of the stellar populations within 100pc of the Sun, including a complete census of white dwarfs. The target catalog from the preliminary selection described here is public (Available athttps://data.desi.lbl.gov/public/ets/target/catalogs/ and detailed at https://desidatamodel.readthedocs.io).

DESI 银河巡天 (MWS) 将在 16< r<19 mag，辅以在较差观测条件下对较亮目标的观测。该调查将允许准确确定恒星运动学和种群梯度，表征厚盘和恒星晕中的弥散亚结构，能够发现金属含量极低的恒星和其他稀有恒星类型，并改善对银河系 3D 暗物质分布的限制来自晕星运动学。MWS 还将实现对太阳 100% 范围内恒星群的详细描述，包括对白矮星的完整普查。此处描述的初步选择的目标目录是公开的（可在 https://data.desi.lbl.gov/public/ets/target/catalogs/ 获得，详情请见 https://desidatamodel.readthedocs.io）。