Although extensive research on magnetic reconnection, e.g., current sheets, inflows/outflows, and plasma ejections, has been done, the dynamical evolution of newly formed structures during and after the reconnection between two sets of atmospheric structures is rarely studied. Here we investigate five reconnection events based on observations from the Solar Dynamics Observatory and the New Vacuum Solar Telescope. In each event, two independent atmospheric structures are involved. While they meet, a plasma sheet is detected. After exchanging topological connectivity, new structures are formed in the outflow regions. For each new structure, it is composed of a part of one original structure and that of the other one. In this Letter, for the first time, we find that there are two types of evolution patterns of the new structures. The first type is that the new structures move away from the reconnection position as a whole and then undergo a to-and-fro motion (an oscillation). The second is that the new structures display a “throwing whip” movement. We suggest that the evolution patterns are relevant to the topological configuration of the original structures and the position of the reconnection site.

中文翻译：

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磁重联后新形成结构的动力学演化


尽管人们对磁重联（例如电流片、流入/流出和等离子体喷射）进行了广泛的研究，但很少研究两组大气结构重联期间和之后新形成的结构的动力学演化。在这里，我们根据太阳动力学天文台和新真空太阳望远镜的观测研究了五个重连事件。每次事件都涉及两个独立的大气结构。当它们相遇时，检测到血浆片。交换拓扑连通性后，在流出区域形成新的结构。对于每个新结构，它都由一个原始结构的一部分和另一个原始结构的一部分组成。在这封信中，我们第一次发现新结构的演化模式有两种。第一种是新结构整体远离重连位置，然后进行往复运动（振荡）。第二是新结构表现出“扔鞭子”的动作。我们认为演化模式与原始结构的拓扑结构和重联位点的位置有关。