太阳多极活动区中的磁重联、剪切低磁弧内的强电流和冕穴结构

探讨了复杂磁结构上空日冕物理状态与磁剪切的关系．结果表明在强磁场的磁中性线上方磁剪切会引起具有强电流和较强等离子体压力的低磁弧．这可解释Ｙｏｈｋｏｈ 卫星的观测结果

MAGNETIC RECONNECTION, STRONG ELECTRIC CURRENTS IN SHEARED LOW LYING MAGNETIC LOOPS AND CORONAL CAVITY IN SOLAR MULTIPOLAR MAGNETIC FIELDS

By using the finite element method, a partial differential equation (magnetohydrostatic equation) is solved. The plasma pressure and coronal magnetic field of the multipolar active region are determined. The authors have found that the height of the magnetic field lines above the neutral line of strong magnetic field decreases as the magnetic shearing increases. Both the electric current density and plasma pressure of the low lying magnetic loops become higher. It is believed that the low lying magnetic loops store eruption energy before solar high energy eruption in the complex multipolar active region. This may be used to interpret the preflare soft X ray data of the Yohkoh satellite. It has also been found that the coronal plasma pressure increases with the magnetic shearing. This implies that the increase of coronal mass density may be the source of coronal mass ejection.