论文标题
太阳能磁通绳的喷发由通量进料引起
Eruption of Solar Magnetic Flux Ropes Caused by Flux Feeding
论文作者
论文摘要
据信大规模太阳喷发具有磁通绳作为核心结构。但是，对于磁通绳如何建立以及触发其喷发的原因仍然难以捉摸。最近的观察结果发现，在多次“通量喂养”发作之后爆发了突出。在每个发作中，一个色球纤维上升，并与上方的突出相融合。在这封信中，我们进行了2.5维的磁性水力学（MHD）数值模拟，以研究通量喂养机制是否可以解释这种喷发。模拟表明，小通量绳的离散出现可以通过将轴向通量馈入先前的通量绳来引发喷发，直到其总轴向通量达到临界值。喷发的开始由理想的MHD过程主导。我们的仿真结果证实了通量进料是导致太阳磁通绳喷发的可行机制。
Large-scale solar eruptions are believed to have a magnetic flux rope as the core structure. However, it remains elusive as to how the flux rope builds up and what triggers its eruption. Recent observations found that a prominence erupted following multiple episodes of "flux feeding". During each episode, a chromospheric fibril rose and merged with the prominence lying above. In this letter, we carried out 2.5-dimensional magnetohydrodynamic (MHD) numerical simulations to investigate whether the flux-feeding mechanism can explain such an eruption. The simulations demonstrate that the discrete emergence of small flux ropes can initiate eruptions by feeding axial flux into the preexistent flux rope until its total axial flux reaches a critical value. The onset of the eruption is dominated by an ideal MHD process. Our simulation results corroborate that the flux feeding is a viable mechanism to cause the eruption of solar magnetic flux ropes.
