The rotation-magnetic field relation

摘要

Today, the generation of magnetic fields in solar-type stars and its relation to activity androtation can coherently be explained, although it is certainly not understood in its entirety. Rotationfacilitates the generation of magnetic flux that couples to the stellar wind, slowing down the star.There are still many open questions, particularly at early phases (young age), and at very low mass.It is vexing that rotational braking becomes inefficient at the threshold to fully convective interiors,although no threshold in magnetic activity is seen, and the generation of large scale magnetic fieldsis still possible for fully convective stars. This article briefly outlines our current understanding ofthe rotation-magnetic field relation.