arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1706.04783astro-ph.SR
收藏

日冕环的膨胀和收缩是太阳爆发引起的涡旋流的证据

Expanding and Contracting Coronal Loops as Evidence of Vortex Flows Induced by Solar Eruptions

J. Dudík, F. P. Zuccarello, G. Aulanier, B. Schmieder, P. Démoulin

备注：
The Astrophysical Journal, accepted
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

据预测，爆发的太阳耀斑会在爆发的磁通量绳的两侧产生大规模的涡流。该过程类似于众所周知的产生涡环的流体动力学过程。涡旋导致位于耀斑活动区外围的闭合日冕环的平流。预计涡流的上部为外流，下部为回流。在这里，我们研究了两个爆发的太阳耀斑，一个X1.1级耀斑SOL 2012 -03- 05 T03：20和一个C3.5级耀斑SOL 2013 -06- 19 T07：29。在这两个耀斑中，我们发现大气成像仪在其171\，193\，193\，211\，211\，194 ~通带观测到的日冕环都表现出膨胀和收缩运动的共存，与模型预测一致。在X级耀斑中，多个膨胀/收缩环共存超过35分钟，而在C级耀斑中，193\，171\，172中的膨胀环似乎与171\，172中的明显内爆环拱廊靠近并同时。后来，193\，~环也切换到收缩。这些观测结果自然可以用爆发性太阳耀斑模型中的涡流来解释。

英文摘要：

Eruptive solar flares were predicted to generate large-scale vortex flows at both sides of the erupting magnetic flux rope. This process is analogous to a well-known hydrodynamic process creating vortex rings. The vortices lead to advection of closed coronal loops located at peripheries of the flaring active region. Outward flows are expected in the upper part and returning flows in the lower part of the vortex. Here, we examine two eruptive solar flares, an X1.1-class flare SOL2012-03-05T03:20 and a C3.5-class SOL2013-06-19T07:29. In both flares, we find that the coronal loops observed by the Atmospheric Imaging Assembly in its 171\,Å, 193\,Å, or 211\,Å~passbands show coexistence of expanding and contracting motions, in accordance with the model prediction. In the X-class flare, multiple expanding/contracting loops coexist for more than 35 minutes, while in the C-class flare, an expanding loop in 193\,Å~appears to be close-by and co-temporal with an apparently imploding loop arcade seen in 171\,Å. Later, the 193\,Å~loop also switches to contraction. These observations are naturally explained by vortex flows present in a model of eruptive solar flares.

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。

↑