日冕三重无力场电流片的磁场重联  

Magnetic Reconnection of Triple Force-Free Current Sheets in the Corona

作　　者：胡友秋[1] 

机构地区：[1]中国科学技术大学地球和空间科学系,合肥230026

出　　处：《天体物理学报》1999年第2期156-162,共7页

基　　金：国家自然科学基金

摘　　要：采用二维三分量磁流体力学模型，对日冕三重无力场电流片的磁场重联进行了数值研究，揭示了重联过程的基本物理特征．这类重联过程将加热和加速日冕等离子体，并导致多个高温、高密度、高磁螺度的磁岛的形成和向上喷发．这表明，多重无力场电流片的重联可能在日冕磁能释放、上行等离子体团的形成和太阳磁场螺度向行星际空间的逃逸方面起重要的作用．sing a two-dimensional, three-component magnetohydrodynamic model, a numericalstudy is presented on the magnetic reconnection of triple electric current sheets in the corona,and it reveals some fundamental properties of the reconnection process. The magneticreconnection process heats and accelerates the coronal plasma, leading to the formationand upward ejection of magnetic islands of high temperature, density and magnetic helicity.This indicates that magnetic reconnection of multiple force-free current sheets may play acrucial role in the magnetic energy release in the corona, in the formation of upward movingplasmoids, and in the escape of magnetic helicity from the Sun to interplanetary space.

关 键 词：太阳磁场 无力场 磁场重联 磁螺度 日冕 电流片 

分 类 号：P182.7[天文地球—天文学] P182.62