Rotation and activity across HR diagram

We present mean chromospheric CaII H and K activity levels and rotation periods, derived from the Mount Wilson Observatory HK Project time series. These are combined with...本研究报道了基于威尔逊山天文台（Mount Wilson Observatory）HK项目时间序列推导得到的色球层钙II H和K（CaII H and K）平均活动水平与自转周期。此类数据将与……相结合。