螺旋结构日珥爆发过程的物理本质

THE PHYSICAL NATURE OF THE ERUPTIVE PROCESS OF HELICAL PROMINENCES

用Ｋｕｐｅｒｕｓ－Ｒａａｄｕ模型描述日珥与背景场的互作用，Ｌｕｎｄｑｕｉｓｔ场描述日珥电流和磁场的分布，综合分析１９８０年８月１８日爆发日珥的观测资料，讨论了该日珥爆发过程的物理本质．结果表明：（１）爆发日珥的物理原因是由于Ｌｕｎｄｏｕｉｓｔ场的ｋｉｎｋ不稳定性；（２）爆发过程中日珥磁能快速释放，从而导致电流强度不断减小，出现日珥上升并逐步趋于稳定；（３）日珥的爆发可能是导致ＣＭＥｓ的重要原因之一．

With the Kuperus-Raadu model to describe the interaction between a prominence bud the background magnetic field, and Lundquist field to describe the distribution of current and magnetic field inside the prominence, the observational data of eruptive prominence on August 18, 1980 is systametically analysed and the physical nature in its eruptive process is discussed. The results show: (1) the physical cause of prominence to erupt is the kink-instabity of Lundquist field; (2) in the eruptive process, the magnetic energy of prominence releases fast so that the current intensity decreases continuously and prominence goes up and approaches stable state gradually;(3) the eruption of prominence may be one of the most important factorcausing CMEs.