活动区NOAA 10808 2005年9月13日暗条爆发的触发机制
Triggering Mechanism for the Filament Eruption on 2005 September 13 in Active Region NOAA 10808
摘要：
2005年9月13日，在第23太阳活动周的活动区NOAA 10808发生了一次暗条喷发，伴随着日冕日冕物质抛射。利用9月13日暗条爆发前的多波段观测资料，研究了导致这次灾难性爆发的过程。我们发现，在爆发前两天，暗条以0.1km/s的速度缓慢上升。在缓慢上升过程中，在暗条的足点附近观察到许多小耀斑，在那里新的磁性元素正在出现。根据观测事实，讨论了暗条爆发的触发机制。我们认为朝向爆发的过程如下：首先，一系列的小耀斑在改变覆盖在暗条上的环的拓扑结构中发挥了作用。其次，小耀斑逐渐改变了暗条的平衡态，并导致暗条在两天内缓慢上升。最后，当暗条接近失去平衡的临界点时发生的C2.9耀斑直接导致了灾难性的暗条爆发。
英文摘要：
On 2005 September 13 a filament eruption accompanied by a halo CME occurred in the most flare-productive active region NOAA 10808 in Solar Cycle 23. Using multi-wavelength observations before the filament eruption on Sep. 13th, we investigate the processes leading to the catastrophic eruption. We find that the filament slowly ascended at a speed of 0.1km/s over two days before the eruption. During slow ascending, many small flares were observed close to the footpoints of the filament, where new magnetic elements were emerging. On the basis of the observational facts we discuss the triggering mechanism leading to the filament eruption. We suggest the process toward the eruption as follows: First, a series of small flares played a role in changing the topology of the loops overlying the filament. Second, the small flares gradually changed the equilibrium state of the filament and caused the filament to ascend slowly over two days. Finally, a C2.9 flare that occurred when the filament was close to the critical point for loss of equilibrium directly led to the catastrophic filament eruption right after itself.
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