行星际磁场的螺旋扇形过渡区

从行星际磁场的大尺度螺旋形构型和扇形边界附近太阳风流动与冕旒的可能相关,本文得到一个推论,即在行星际空间可能存在一种较厚的螺旋扇形过渡区。行星际磁场和太阳风的实地观测证实了这种较厚的螺旋扇形过渡区的存在。在所分析的45个螺旋扇形过渡区中,磁场强度都不为零;大部分大于或小于周围平均场强。本文进一步分析了磁增大和磁减小两类过渡区中的物理性质和可能成因。

THE SPIRAL SECTOR TRANSITION REGIONS IN THE INTERPLANETARY MAGNETIC FIELDS

Based on the large-scale configuration of the magnetic fields in the interplanetary space and the possible association of the solar wind flow near the sector boundary crossing with the coronal streamer,it is suggested that in the interplanetary space there might be some spiral sector transition regions which are thicker than the sector boundaries.In situ observations of interplanetary magnetic field and solar wind plasma do show the existence of the spiral sector transition regions.The magnetic strength in the regions does not go to zero for all the 45 cases studied in this work,most of them have the magnetic strength either much higher or much lower than the average of 5γ in the adjecent magnetic sectors.The physical properties in the magnetic depressing (MD) and magnetic enhancement (MB) regions and the possible rauses have also been analyzed and discussed.