Cool star rotation periods in NGC 2281

Cool star rotation periods have become an important tool in determining ages of open clusters. We aim to estimate the age of the open cluster NGC 2281 based on the rotational...低温恒星（Cool star）的自转周期已成为测定疏散星团（open clusters）年龄的重要工具。本研究旨在基于自转……估算疏散星团NGC 2281的年龄。