Photometry and proper motions in IC4665

Knowledge of the mass function in open clusters constitutes one way to constrain the formation of low-mass stars and brown dwarfs along with the knowledge of the frequency of...对疏散星团（open clusters）中的质量函数（mass function）的认知，是约束低质量恒星（low-mass stars）与褐矮星（brown dwarfs）形成过程的途径之一，同时可结合对……的频率的相关认知。