空间科学学报2000，Vol.20Issue(4)：297-302,6.
磁场强度对日冕定态结构的影响
EFFECTS OF THE INTENSITY OF MAGNETIC FIELD ON THE STEADY CORONAL STRUCTURE
摘要
Abstract
Based on the 2-D MHD model and time relaxation method, using theprojective characteristic boundary conditions on the inner and outerboundaries, the effects of the magnetic field intensity on the steadycoronal structures are investigated. The simulation results show thatwith the increasing dipolar magnetic field, the constraint of themagnetic field on the solar wind is strengthened, the degree of openingof the close magnetic field in the lower latitude decreases, thevelocity difference between the higher latitude and the lower latitudeincreases, taking maximum near the point where Alfvenic mach number is1, and the velocity transition region is steepened. On the other hand,with the increasing heliospheric distance, the velocity transitionregion is also steepened. The result can be used to qualitativelyexplain the Ulysses observations in the region far from the sun.关键词
日冕—磁场—太阳风Key words
Coronal/Magnetic field/Solar wind分类
天文与地球科学引用本文复制引用
李敬群,魏奉思..磁场强度对日冕定态结构的影响[J].空间科学学报,2000,20(4):297-302,6.基金项目
国家自然科学基金资助项目(49990451, 49925412),中国科学院知识创新工程试点任务(1999-106-HT-001) （49990451, 49925412）
