论文标题
发射器侧面引起的太阳彩带井喷冠状质量弹出
The initiation of a solar streamer blowout coronal mass ejection arising from the streamer flank
论文作者
论文摘要
流媒体井喷（SBO）冠状质量弹出（CMES）代表特定类别的CME，其特征是上覆的流媒体逐渐膨胀和含有通量摩擦结构的慢速CME。流媒体侧面引起的SBO CME属于一个特殊类别的SBO CMES类别，其中涉及较高的流媒体拱廊下的三个下拱。但是，由于观察性局限性，SBO CMES的特殊类别的启动机制仍然难以捉摸。在这里，我们报告了与源自流板侧面的极性冠状丝的喷发相关的SBO CME的批判性观察。灯丝以扭动的运动慢慢朝太阳赤道升起，并在爆发前突然加速。有趣的是，在上升的过程中，细丝场经历了逐渐的外部重新连接，这是由包裹式的通量结构的倾角底部从光滑的凹形，缓慢的流入（$ \ sim $ 1.8 km S $^{-1} $）中变化而来下面。新形成的灯丝源处的较低环和拉伸尾部场中的Y形结构表示丝爆发的内部重新连接。外部和内部重新连接的明确签名阐明了SBO CMES的启动机制。
Streamer blowout (SBO) coronal mass ejections (CMEs) represent a particular class of CMEs that are characterized by a gradual swelling of the overlying streamer and a slow CME containing a flux-rope structure. SBO CMEs arising from the streamer flank fall into a special category of SBO CMEs involving three lower arches under the higher streamer arcade. However, the initiation mechanism for this special category of SBO CMEs remains elusive, due to the observational limitations. Here we report critical observations of a SBO CME associated with the eruption of a polar crown filament that originated from the streamer flank. The filament slowly rose toward the solar equator with the writhing motion, and underwent a sudden acceleration before its eruption. Interestingly, during the rising, the filament fields experienced gradual external reconnections, which is evidenced by the dip-shaped bottom of the enveloping flux-rope structure changing from a smooth concave, the slow inflows ($\sim$1.8 km s$^{-1}$) from both the filament fields and the coronal loops beneath, and the persistent brightenings around the interface between the filament fields and the coronal loops beneath. The newly formed lower loops at the filament source and the Y-shaped structure in the stretched tail fields indicate the internal reconnections for the filament eruption. The clear signatures of the external and internal reconnections shed light on the initiation mechanisms of SBO CMEs.
