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arXiv 1503.08165astro-ph.SR
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快模波在日冕弧环中的部分反射和俘获

Partial Reflection and Trapping of a Fast-mode Wave in Solar Coronal Arcade Loops

Pankaj Kumar, D. E. Innes

摘要:

我们报告的第一个直接观察到的快模波传播沿和垂直于冷(171欧姆)拱圈观察SDO/AIA。该波与一个冲动/紧凑的耀斑有关,靠近太阳黑子的边缘。EUV波前从耀斑中心向外径向扩展,并在日冕中在约3-4分钟内从1060-760 km/s减速。部分极紫外波沿着一个大规模的冷环拱廊传播,并被部分反射回耀斑现场。波的相速度约为1450 km/s,这被解释为快模波。第二个重叠的环形拱廊,垂直于冷拱廊,被加热,并成为可见的友邦保险热通道。当EUV波沿着较低的环路拱廊来回传播时,这些热环路随EUV波及时摆动。我们认为,一个脉冲能量释放在一个脚点的拱圈导致的EUV冲击波的发病,传播沿和垂直于磁场。

英文摘要:

We report on the first direct observation of a fast-mode wave propagating along and perpendicular to cool (171 Å) arcade loops observed by the SDO/AIA. The wave was associated with an impulsive/compact flare, near the edge of a sunspot. The EUV wavefront expanded radially outward from the flare center and decelerated in the corona from 1060-760 km/s within ~3-4 minute. Part of the EUV wave propagated along a large-scale arcade of cool loops and was partially reflected back to the flare site. The phase speed of the wave was about 1450 km/s, which is interpreted as a fast-mode wave. A second overlying loop arcade, orientated perpendicular to the cool arcade, is heated and becomes visible in the AIA hot channels. These hot loops sway in time with the EUV wave, as it propagated to and fro along the lower loop arcade. We suggest that an impulsive energy release at one of the footpoints of the arcade loops causes the onset of an EUV shock wave that propagates along and perpendicular to the magnetic field.

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。

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