Rotation periods for 261 M dwarfs

Knowledge of rotation periods (Prot) is important for understanding the magnetic activity and angular momentum evolution of late-type stars, as well as for evaluating radial...自转周期（Prot，rotation period）的相关知识，对于探究晚型星的磁活动与角动量演化过程，以及评估径向相关物理量等方面均具备重要价值。