活动区物质运动、电流演化与耀斑爆发的物理关系

THE PHYSICAL RELATIONS AMONG MATTER MOTIONS,EVOLUTION OF CURRENTS AND ERUPTION OF FLARES IN ACTIVE REGIONS

本文基于:(i)日珥(暗条)以及部分EUV环,x-ray环可能构成活动区中主要电流回路;(ii)活动区磁场由活动区电流系所激发的场和所谓背景磁场组成;(iii)活动区磁场和电流的演化与活动区光球物质运动密切相关。采用Kuperus-Raadu型电流回路,并根据由观测确定的活动区光球物质运动的几种主要形式,通过数值方法,求解电流的运动方程和能量方程,获得了活动区电流演化的动态规律。所得结果从理论上阐明了耀斑的发生及其基本物理过程,与活动区物质运动及电流演化之间的内禀关系。

In this paper the following assumptions are made: (ⅰ) Prominences (filaments) or EUV loops, X-Ray loops are the main current circuits in active regions. (ⅱ) The magnetic field in an active region is composed of the one stimulated by current circuits and the so-called ground magnetic field. (ⅲ) The evolution of the magnetic field and current is closely related to the matter mo- tions in active regions. According to the Kuperus-Raadu model, we solve the momentum equation and the energy equation of the current circuits by the numerical method, in terms of several main forms of the matter motions in active regions. The laws of evolution of the current circuits in active regions are obtained. These results expound the intrinsic relationship among the physical processes of flares, the matter motions and the evolution of current circuits in active regions.