日冕环和日冕拱的平衡位形

在线性场近似条件下,本文讨论了日冕环的二维平衡位形。用富利叶变换的方法,求出了问题的分析解,解释了日冕环观测结果的主要特性。沿日冕环纵向的压力分布均匀,日冕环的位形可以比无力场更稳定。由于日冕环可以储存更多的剪切场或扭转场的磁能,释放这部分磁能就可以驱动日冕环运动产生日冕瞬变过程,或者使环内的等离子体加热或加速而产生太阳耀斑。 

THE EQUILIBRIUM CONFIGURATION OF THR CORONA LOOP AND THE CORONA ARCHIDE

Under the assumption of linear field,the equation of the two-dimensional configuration of corona loop or the corona archide may be given as Δψ+G(dG/dψ)=-4π(dp/dψ), which is solved by using the method of Foriour transformation.The analytical solution is applied to explain the observational results.The theoretical results show that the pressure should be uniform along the-loop,and the configuration of the loop is more stable than that of the force free field.The influence of the shear magnetic field and the pressure on the configuration are also discussed.More magnetic energy of shear or twisted magnetic field may be stored in the loop,the corona loop will be driven to produce the corona transient process or the plasma will be heated or accelerated to produce solar flares if part of the stored energy is released.