太阳剩余磁场研究进展

太阳剩余磁场是指形成于太阳主序星阶段之前，深藏在太阳辐射核内部的原始磁场。由于太阳内部高电导率和准静态等因素，其剩余磁场耗散相当缓慢，而得以保留至今。太阳剩余磁场的存在不仅能够解释太阳活动的很多不对称性现象，如南北不对称性、活动经度与活动穴、低纬度冕洞和Maunder极小期等，还能通过改变自激发发电机模型的边值条件而影响整个太阳表面磁场的分布与演化。从观测结果和理论模型两方面评述了太阳剩余磁场的研究成果及最新进展，并简单讨论了进一步努力的方向。

Progress in the Studies on a Relic Solar Magnetic Field

It is really possible that the Sun possesses a relic magnetic field of the pre-main sequence epoch in its radiative core. Due to a stably stratified fluid and an extremely high electrical conductivity in the solar interior, a relic solar magnetic field can survive for a very long time. A relic field can help us to explain many asymmetries in solar activities, such as the north-south asymmetries of solar magnetic activities, active longitudes and holes, low-latitude coronal holes, Maunder minimum, etc. In addition it can affect the distribution and evolution of solar surface magnetic field by changing the boundary conditions of solar dynamo. This paper focuses on the introduction of recent progress and issues in observations and theories of relic solar magnetic field. Some unresolved problems and highlights are also discussed.