OBSERVATIONS AND INTERPRETATION OF A LOW CORONAL SHOCK WAVE OBSERVED IN THE EUV BY THE SDO/AIA
OBSERVATIONS AND INTERPRETATION OF A LOW CORONAL SHOCK WAVE OBSERVED IN THE EUV BY THE SDO/AIA
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DOI：
10.1088/0004-637x/738/2/160
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
Suli Ma;J. Raymond;L. Golub;Jun Lin;Huadong Chen;P. Grigis;P. Testa;D. Long
中科院分区：
文献类型：
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作者：
Suli Ma;J. Raymond;L. Golub;Jun Lin;Huadong Chen;P. Grigis;P. Testa;D. Long
利用太阳动力学观测站大气成像组件的高时空分辨率，研究了2010年6月13日发生的一次日冕激波及其相关的极紫外线(EUV)波。我们的主要发现是：(1)激波只出现在以193°和211°为中心的通道中，是一个在其伴随的半球形日冕物质抛射(CME)气泡之前传播的穹顶状增强；(2)根据射电数据，激波的密度压缩为1.56，激波温度约为2.8mK；(3)冲击波最早出现在UT时5时38分，即耀斑开始后2分钟和日冕物质抛射气泡出现后1分钟；(4)从1.23R☉左右出发的穹顶状激波顶部，激波厚度为∼2×10~4公里；(5)激波速度与S−1号约600公里至S−1号约550公里的速度略有减小一致；(6)激波的横向扩展表明，S−1号附近有一个恒定的速度，在不同的高度和方向有不同的变化。我们的发现支持日冕激波是由CME气泡驱动的观点，而日冕EUV波与快波是一致的，或者至少包括快波分量。
Taking advantage of both the high temporal and spatial resolutions of the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, we studied a limb coronal shock wave and its associated extreme ultraviolet (EUV) wave that occurred on 2010 June 13. Our main findings are: (1) the shock wave appeared clearly only in the channels centered at 193 Å and 211 Å as a dome-like enhancement propagating ahead of its associated semi-spherical coronal mass ejection (CME) bubble; (2) the density compression of the shock is 1.56 according to radio data and the temperature of the shock is around 2.8 MK; (3) the shock wave first appeared at 05:38 UT, 2 minutes after the associated flare has started and 1 minute after its associated CME bubble appeared; (4) the top of the dome-like shock wave set out from about 1.23 R☉ and the thickness of the shocked layer is ∼2 × 104 km; (5) the speed of the shock wave is consistent with a slight decrease from about 600 km s−1 to 550 km s−1; and (6) the lateral expansion of the shock wave suggests a constant speed around 400 km s−1, which varies at different heights and directions. Our findings support the view that the coronal shock wave is driven by the CME bubble, and the on-limb EUV wave is consistent with a fast wave or at least includes the fast wave component.