标题： 尖端-RGB、AGB和后AGB恒星磁场的起源 显示英文标题

标题： The origins of the magnetic field in tip-RGB, AGB and post-AGB stars

摘要： 在过去十五年中，位于法国皮卡迪米山的新型光谱偏振仪Narval使得研究在主序星之后较为演化的冷巨星中的弱磁场成为可能。我们简要总结了关于赫茨普龙-罗素（H-R）图右上部分的巨星磁性和活动性的最新知识，并讨论了渐近巨星分支（AGB）和后AGB恒星中磁场生成的可能机制。 显示英文摘要

摘要： During the last decade and a half, the new generation spectropolarimeter Narval at Pic du Midi, France allowed the study of weak magnetic fields in cool giant stars that are fairly evolved after main sequence. We present a short summary on the recent knowledge on the magnetic fields and activity in giants situated in the upper right part of the Hertzsprung-Russel (H-R) diagram and discuss on the possible mechanisms for magnetic field generation in the asymptotic giants branch (AGB) and post-AGB stars.