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RHESSI OBSERVATIONS OF A SIMPLE LARGE X-RAY FLARE ON 2003 NOVEMBER 3

机译:2003年11月3日一次简单的大型X射线耀斑的RHESSI观测

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摘要

We present data analysis and interpretation of a simple X-class flare observed with RHESSI on 2003 November 3. In contrast to other X-class flares observed previously, this flare shows a very simple morphology with well-defined looptop (LT) and footpoint (FP) sources. The almost monotonic upward motion of the LT source and increase in separation of the two FP sources are consistent with magnetic reconnection models proposed for solar flares. In addition, we find that the source motions are relatively slower during the more active phases of hard X-ray emission; the emission centroid of the LT source shifts toward higher altitudes with the increase of energy; and the separation between the LT emission centroids at two different photon energies is anticorrelated with the FP flux. Nonuniformity of the reconnecting magnetic fields could be a possible explanation of these features.
机译:我们将在2003年11月3日对RHESSI观测到的一个简单X级耀斑进行数据分析和解释。与之前观察到的其他X级耀斑相比,该耀斑显示出非常简单的形态,具有清晰的环顶(LT)和脚点( FP)来源。 LT源几乎单调向上运动以及两个FP源的分离增加与为太阳耀斑提出的磁重联模型一致。此外,我们发现在硬X射线发射的更活跃阶段,源运动相对较慢;随着能量的增加,LT源的发射质心向更高的高度移动;在两个不同的光子能量下,LT发射质心之间的间隔与FP通量反相关。重新连接磁场的不均匀性可能是这些特征的可能解释。

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