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Evolution of the Source of Quasi-Periodic Microwave Pulsations in a Single Flaring Loop

机译:单喇叭形环中准周期微波脉动源的演变

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Quasi-periodic pulsations (QPP) of the microwave emission of a solar flare on 2002 July 3, observed with the Nobeyama Radioheliograph (Japan), were investigated with emphasise on the spatial structure of the emission source. It was shown that the time profiles of the variation of the distance between two main sources of the emission and the microwave flux are similar, with a common quasi-periodicity. The most significant QPP is found to be at 30 s. The increase in the microwave emission flux from the Northern source, as well as the increase in the spatiallyintegrated signal, is accompanied by a decrease in the distance between the sources. In contrast, the decrease in the flux corresponds to the decrease in the source separation. This behaviour, together with the observed spatial localisation of the QPP, is very consistent with the vertically polarised global kink mode of the flaring loop.
机译:利用日本的Nobeyama Radioheliograph(日本)对2002年7月3日太阳耀斑的微波发射的准周期脉动(QPP)进行了研究,重点是发射源的空间结构。结果表明,两个主要发射源之间的距离变化和微波通量的时间变化曲线相似,具有相同的准周期性。发现最重要的QPP为30 s。来自北方源的微波发射通量的增加以及空间积分信号的增加伴随着源之间距离的减小。相反,通量的减少对应于源分离的减少。这种行为,加上观察到的QPP的空间定位,与扩口环的垂直极化整体扭结模式非常一致。

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