HST VI photometry and proper motions in NGC 6528

Using two epochs of HST/WFPC2 images of the metal-rich globular cluster NGC 6528 we derive the proper motions of the stars and use them to separate the stars belonging to NGC...本研究基于富金属球状星团NGC 6528的两次观测历元哈勃空间望远镜（Hubble Space Telescope, HST）广域行星相机2（Wide Field and Planetary Camera 2, WFPC2）成像数据，推导得到该星团内恒星的自行运动，并以此分离出归属NGC 6528的恒星。