用三维运动学模式研究太阳暗条消失与行星际扰动

本文用19个行星际扰动事件为样本，采用三维运动学模式研究暗条消失事件（简称FD事件）与行星际瞬变扰动间的关系．太阳上的扰动源取行星际扰动前2-5d以内的所有FD事件，用势场模式计算得到的源表面磁场为背景，模拟每个扰动在行星际中的传播及其相互作用过程，观察扰动到达地球的时间和扰动大小．从模拟的结果来看，FD事件与行星际扰动事件有较好的对应关系，说明FD事件是行星际瞬变事件的一类重要的太阳源．19个事件中有2个没有对应的FD事件，5个模拟结果与观测结果相差较大，其余12个模拟结果与实际观测符合很好．这与过去这方面的工作有所不同，我们具体模拟了每个扰动事件的传播过程，同时考虑了扰动间的相互作用，包括扰动与共转流之间的相互作用，为太阳-行星际-地磁链天气过程的预报奠定了基础．

RELATIONSHIP BETWEEN FILAMENT DISAPPEARANCE EVENTS AND INTERPLANETARY DISTURBANCES STUDIED BY A 3-D KINEMATIC METHOD

Using a 3-D kinemahc method, the connection betWeen solar filament disappearance events (FD) and interplanetary distUrbances is inveshgated. Nineteen events of interplanetary disturbances observed at IAU were chosen as studying saxnples.All FD events which occurred 2-5 days earlier then the investigated samples were considered as probable disturbance sources. Sources surface field (at 2.5 Rs) calculated from the photospheric magnetic field observations using a potential field model, was taken as the background magnetic field. We simulated the propagation and intemehon of the interplanetary disturbances caused by the selected FD events and the resultS are compared with simulations and observations. Good connections could be found betWeen FD events and interplanetary disturbances for 63% of the total events. Our resultS indicate FD events are important candidates as the source of interplanetary disturbance events.