We find a significant correlation between the magnetic and rotational moments for a sample of 112 lower main-sequence stars. The rotational moment is calculated from measurements of the rotation period in most of the stars (not from the projected rotational velocity inferred from Doppler broadening). The magnetic moment is computed from a database of homogeneous measurements of the mean level of Ca II H and K emission fluxes sampled for most of the stars over an interval of 25 yr. The slope connecting the logarithm of the magnetic moment and the logarithm of the rotational moment is about +0.5-0.6, with a Pearson correlation coefficient of about +0.9. The scatter of points from the mean relation has a component that is natural and caused by decade-long surface variability.
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机译：对于112个较低主序恒星的样本，我们发现了磁矩和旋转矩之间的显着相关性。旋转力矩是根据大多数恒星旋转周期的测量值计算得出的（而不是根据多普勒展宽推断出的预计旋转速度计算得出的）。磁矩是从对25年间隔内大部分恒星采样的Ca II H和K发射通量的平均水平的均一测量值的数据库计算得出的。连接磁矩的对数和旋转矩的对数的斜率约为+ 0.5-0.6，皮尔逊相关系数约为+0.9。来自均值关系的点的散布具有自然的成分，并且是由长达十年的表面变化引起的。
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