PPM-XL Bright M Dwarfs Catalog

Using the Position and Proper Motion Extended-L (PPMXL) catalog, the authors have used optical and near-infrared color cuts together with a reduced proper motion cut...本研究依托位置与自行扩展L（PPMXL）星表，采用了光学与近红外颜色筛选结合缩减自行筛选的方法……