太阳活动与变化的150天周期研究进展

Progress in the Studies on 150-day Period of the Solar Activity and Variability

太阳活动,除了涵盖太阳表面磁场驱动的活动现象外,还包括光度、自转和对称性等物理因素的长期演化。研究它们变化的周期对深入理解其产生机制有着重要的指导意义。从1984年Rieger等人首次发现耀斑的产生率存在约154 d周期始,人们在很多现象中都找到了它的踪影,150余d的周期成了继11 yr太阳活动周和27 d太阳自转周后最引人注目的新周期。重点综述了在耀斑、黑子等活动领域内对150 d周期现象研究的现状,介绍了有关它成因的研究进展,指出了尚待解决的问题及进一步努力的方向。

Solar activity phena includes not only the phenomena which are driven by solar surface magnetic fields, but also the phenomena such as evolutions of total luminosity, rotation, symmetry and so on. It is very important to study the periodicity of these phenomena as their periodicity may imply some physical mechanism that result in the phenomena. The first discovery was that the flare occurrence rate had a 154-day period in 1984, and after that this period was found in many kinds of solar active phenomena. Besides the 11-year cycle of solar activity and 27-day period of solar rotation, the 154-day period has become one of the most famous periods. This paper summarizes the progress in the study of the 154-day period in these phenomena. Some unresolved problems and highlights are also discussed.