漏斗状日珥形成与消失的观测研究
Observations of the Formation and Disappearance of a Funnel Prominence
AI总结：
本文观测研究了漏斗状日珥的形成与消失过程，发现色球等离子体被输送至日冕腔后经垂直下降流排出可形成漏斗状日珥，揭示了其演化受磁重联及物质流动驱动。
摘要：
我们展示了一项关于漏斗状日珥形成与消失的观测研究。在漏斗状日珥形成之前，来自预先存在的极冠日珥顶部的冷物质沿着鞍形日冕环流向其底部，形成了一个较小的日珥。同时，鞍形日冕环逐渐上升，被称为日珥角的U形日冕环开始出现，并伴随出现了一个日冕腔。随后，一个冷柱从色球层出现，垂直上升进入日冕，然后横向移动被输送到U形日冕环中。形成的日珥滑入色球层，而U形日冕环和日冕腔变得更加明显。随着冷物质在U形日冕环底部积聚，这些环经历了显著的下降，并且在冷物质底部出现了一个V形结构，表明U形日冕环可能被拖拽下垂。随后，来自V形结构的冷物质几乎垂直地继续向色球层流动，形成了漏斗状日珥。这种垂直下降流可能是由下垂场线内部或之间的磁重联产生的。由于持续的垂直下降流，U形日冕环被抬起，日珥物质沿着倾斜的日冕环向色球层流动，导致漏斗状日珥消失。我们的观测表明，被输送到日冕腔中然后通过垂直下降流排出的色球等离子体可以形成漏斗状日珥。
英文摘要：
We present an observational study of the formation and disappearance of a funnel prominence. Before the funnel prominence formed, cool materials from the top of a preexisting polar crown prominence flowed along saddle-shaped coronal loops to their base, forming a smaller prominence. Meanwhile, the saddle-shaped coronal loops gradually rose, and U-shaped coronal loops, termed prominence horns, began to appear along with a coronal cavity. Afterwards, a cool column emerged from the chromosphere, rose vertically into the corona, and then moved laterally to be transported into the U-shaped coronal loops. The formed prominence slid into the chromosphere, while the U-shaped coronal loops and the coronal cavity became more pronounced. As cool materials accumulated at the base of the U-shaped coronal loops, these loops underwent a significant descent and a V-shaped structure appeared at the base of the cool materials, indicating that the U-shaped coronal loops may be dragged down to sag. Subsequently, cool materials from the V-shaped structure continued to flow almost vertically toward the chromosphere, forming the funnel prominence. The vertical downflows might be produced by magnetic reconnection within or between the sagging field lines. Due to persistent vertical downflows, the U-shaped coronal loops were lifted up and prominence materials followed along inclined coronal loops towards the chromosphere, causing the funnel prominence to disappear. Our observations suggest that chromospheric plasma transported into a coronal cavity and then drained out via vertical downflows can form a funnel prominence.
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。
