由于扭曲日珥线和相关重联引起的大尺度涡旋运动和多重等离子体团抛射
Large-Scale Vortex Motion and Multiple Plasmoid Ejection Due to Twisting Prominence Threads and Associated Reconnection
摘要：
利用太阳动力学天文台（SDO）上的大气成像组件（AIA）对静止极日珥的特征进行了分析。最初，小规模的类太阳结构在太阳盘面上是明显的，它首先垂直生长，然后向西南边缘移动。后来，一个脊柱连接这些倒钩，我们观察到明显的旋转运动在突出的上部。这些视旋转运动可能通过传递冷等离子体和磁扭曲对暗条的演化和生长起着重要作用。在日珥的上部有明显的大尺度涡旋运动，其中包含一个漩涡状的结构，足点的缓慢运动使日珥的腿由于磁剪切而扭曲，导致两种不同的磁重联。内部重联是由电阻撕裂模不稳定性引发的，这导致在拉长的电流片中形成多个等离子体团。估计增长率为0.02- 0.05。该磁重联加热电流片一小段时间。然而，由于磁重联而释放的大部分能量被周围冷而致密的等离子体吸收，并用于加速等离子体团喷射。多重等离子体团喷射摧毁了当前的片。因此，磁弧在X点附近坍缩。逆磁弧可能与日珥南段重新连接，形成细长的薄电流片。这种外部重连驱动日珥爆发。
英文摘要：
We analyze the characteristics of a quiescent polar prominence using the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). Initially, small-scale barb-like structures are evident on the solar disk, which firstly grow vertically and thereafter move towards the south-west limb. Later, a spine connects these barbs and we observe apparent rotating motions in the upper part of the prominence. These apparent rotating motions might play an important role for the evolution and growth of the filament by transferring cool plasma and magnetic twist. The large-scale vortex motion is evident in the upper part of the prominence, and consists of a swirl-like structure within it. The slow motion of the footpoint twists the legs of the prominence due to magnetic shear, causing two different kinds of magnetic reconnection. The internal reconnection is initiated by a resistive tearing-mode instability, which leads to the formation of multiple plasmoids in the elongated current sheet. The estimated growth rate was found to be 0.02--0.05. The magnetic reconnection heats the current sheet for a small duration. However, most of the energy release due to magnetic reconnection is absorbed by the surrounding cool and dense plasma and used to accelerate the plasmoid ejection. The multiple plasmoid ejections destroy the current sheet. Therefore, the magnetic arcades collapse near the X-point. Oppositely directed magnetic arcades may reconnect with the southern segment of the prominence and an elongated thin current sheet is formed. This external reconnection drives prominence eruption.
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。
