太阳磁场的电流螺度、感应电场和能流分布研究

Distribution of current helicity,induction electric field and poynting flux of solar magnetic fields

太阳光球磁场的动态演化在太阳爆发事件中起着重要作用。电流螺度、感应电场和坡印廷能流是表征磁场非势特性的典型参量。以活动区NOAA10488为例,利用局部相关跟踪方法,依据观测资料计算这3个参量,考察太阳光球磁场运动对于非势磁能的传输、释放作用。分析这个活动区的电流螺度、感应电场以及能流的分布,发现电流螺度和能流的分布情况均与太阳高层大气耀斑爆发密切相关,而感应电场的分布与其爆发的关系尚待进一步研究。

The dynamic evolvement of the magnetic field in the solar photosphere plays key role in the eruptions which occurred in solar corona.Current helicity,induction electric field and Poynting flux of the solar magnetic field have been considered as appropriate representations of the magnetic non-potenciality.The contribution of them to the transverse and relax of the non-potential energies have been analyzed.As an example,the magnetic field of active region NOAA10488 has been studied here.The distributions of current helicity,induction electric field and Poynting flux have been calculated,then their relationship with the flare have been discussed.It is found that the distribution of both the current helicity and the Poynting flux correlate closely to the flare,while the correlation of the induction electric field needs further investigation.