CAJ | 학술논문

应用二维时变可压缩磁流体动力学模拟, 数值研究了双极 -单极磁场中电阻撕裂模不稳定性引起的磁场重联过程, 用于模拟日冕冲浪的形成. 结果表明, 在包含有三区——双极场、电流片和单极场的磁静力平衡初态下, 双极场和单极场中的磁力线将会直接重联, 磁场演变成鞭状(whip)结构. 由弯曲磁力线支撑的等离子体团向上运动到最高位置后, 逐渐下落和弥散. 等离子体团上升速度可达到0.10 vA (vA为双极场中的Alfv'en速度). 模拟结果证实日冕冲浪的形成可能与双极 -单极场中的磁场重联密切相关.
응용이유시변가압축자류체동역학모의, 수치연구료쌍겁 -단겁자장중전조시렬모불은정성인기적자장중련과정, 용우모의일면충랑적형성. 결과표명, 재포함유삼구——쌍겁장、전류편화단겁장적자정력평형초태하, 쌍겁장화단겁장중적자력선장회직접중련, 자장연변성편상(whip)결구. 유만곡자력선지탱적등리자체단향상운동도최고위치후, 축점하락화미산. 등리자체단상승속도가체도0.10 vA (vA위쌍겁장중적Alfv'en속도). 모의결과증실일면충랑적형성가능여쌍겁 -단겁장중적자장중련밀절상관.
In order to simulating the formation of coronalsurges, the characteristics of magnetic reconnection caused by theresistive tearing instability in bipole-monopole magnetic field arestudied numerically by using a two-dimensional, time-dependent,compressible magnetohydrodynamic simulation. The results show that themagnetic lines of the bipole and monopole fields will reconnect directlyand the evolution of magnetic field leads to a whip configuration undera magnetostatic basic state which includes three regions - a bipole, acurrent sheet and a monopole. The upward plasmoid supported by bendedmagnetic field diffuses and falls back to solar surface after reachingits maximum height. The upward velocity of plasmoid reaches0.10v{{ A (vA is Alfv'en velocity in bipolemagnetic field). The simulated result confirms that the formation ofcoronal surges may be related closely to magnetic reconnection inbipole-monopole magnetic field.