磁通量管的扭曲是微火焰活动的一个原因
Twisting Flux Tubes as a cause of Micro-Flaring Activity
摘要：
介绍了太阳AR NOAA 10794附近H-α蓝翼亮点的高节奏光学观测。这些数据是由位于萨克拉门托峰国家太阳观测站的邓恩太阳望远镜使用新开发的相机系统快速双成像仪获得的。小波分析进行搜索强度相关的振荡签名，和周期范围从15到370秒的显着性水平超过95%。在两个单独的微耀斑事件，振荡网站周围的亮点观察到扭曲。我们将振荡点的扭曲与物理通量管的扭曲联系起来，从而产生重联现象。我们推导出的平均扭转速度为8.1公里/秒，并检测到一个峰值之间的扭曲角为180和230度的发射通量。
英文摘要：
High-cadence optical observations of an H-alpha blue-wing bright point near solar AR NOAA 10794 are presented. The data were obtained with the Dunn Solar Telescope at the National Solar Observatory/Sacramento Peak using a newly developed camera system, the Rapid Dual Imager. Wavelet analysis is undertaken to search for intensity-related oscillatory signatures, and periodicities ranging from 15 to 370 s are found with significance levels exceeding 95%. During two separate microflaring events, oscillation sites surrounding the bright point are observed to twist. We relate the twisting of the oscillation sites to the twisting of physical flux tubes, thus giving rise to reconnection phenomena. We derive an average twist velocity of 8.1 km/s and detect a peak in the emitted flux between twist angles of 180 and 230 degrees.
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