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arXiv 2007.01278astro-ph.SR
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通量馈送引起的太阳磁通量绳爆发

Eruption of Solar Magnetic Flux Ropes Caused by Flux Feeding

Quanhao Zhang, Yuming Wang, Rui Liu, Jie Zhang, Youqiu Hu, Wensi Wang, Bin Zhuang, Xiaolei Li

摘要:

大规模的太阳爆发被认为具有磁通量绳作为核心结构。然而,通量绳是如何形成的以及是什么引发了它的爆发,这仍然是难以捉摸的。最近的观测发现,日珥在多次“通量进食”之后爆发。在每一次事件中,色球纤维上升并与上面的日珥合并。在这封信中,我们进行了2.5维磁流体动力学(MHD)的数值模拟,以调查是否可以解释这样的喷发的磁通量馈送机制。模拟表明,小磁绳的离散出现可以通过将轴向磁通馈送到先前存在的磁绳直到其总轴向磁通达到临界值来启动喷发。爆发的开始是由一个理想的MHD过程。我们的模拟结果证实了磁通馈送是一个可行的机制,导致太阳磁通量绳爆发。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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