The magnetic field structures of stars with different ages are studied. No changes in the position and orientation of magnetic dipoles with age are observed. It is concluded that there are no global motions, such as differential rotation meridional circulation, etc., inside magnetic stars. Arguments are presented in favor of the assumption that magnetic stars rotate as solids. These conclusions do not concern the behavior of convective cores.

中文翻译：

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磁性CP星中磁场结构的长期稳定性

研究了不同年龄恒星的磁场结构。没有观察到磁偶极子的位置和方向随年龄的变化。结论是磁星内部不存在全球性运动，如差速自转子午环流等。提出的论点支持磁星作为固体旋转的假设。这些结论与对流核心的行为无关。