On the Solar Origin of Complex Type III-like Radio Bursts Observed at and below 1 MHz
On the Solar Origin of Complex Type III-like Radio Bursts Observed at and below 1 MHz
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关于在 1 MHz 及以下观测到的复杂 III 型射电暴的太阳起源
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
M. Kaiser
中科院分区：
文献类型：
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作者：
M. Reiner;M. Karlický;K. Jiřička;H. Aurass;G. Mann;M. Kaiser
通过同时分析分米波，米波和百米射电观测，我们提供的证据表明，一类百米III类射电事件与电子加速在主耀斑能量释放过程中。我们这样做是通过证明，有一个很好的时间之间的对应关系，百和分米无线电发射，被认为涉及到电子的加速在太阳大气层的深层高度估计为10,000至30,000公里（0.014至0.043 R）。这一类的hectometric III型类似事件可能有简单或复杂的强度-时间曲线。当它们具有长持续时间的复杂轮廓时，分米排放也具有复杂的长持续时间轮廓。在后一种情况下，它们也经常与米制II型射电爆发和日冕物质抛射（CME）有关。然而，我们认为，在观测的基础上，hectometer无线电发射不一定与公制现象。具体地说，它们不太可能是由与产生公制II型爆发的冲击或与CME前方驱动的冲击相关的二次加速过程产生的，尽管hectometric发射时间剖面将（错误地）在形态上被分类为冲击加速（SA）事件。
By simultaneously analyzing decimetric, metric, and hectometric radio observations, we provide evidence that a class of hectometric type III-like radio events are associated with electrons accelerated during the primary flare energy release process. We do this by demonstrating that there is a good temporal correspondence between the hectometric and decimetric radio emissions that are believed to involve the acceleration of electrons in deep layers of the solar atmosphere at heights estimated to be from 10,000 to 30,000 km (0.014 to 0.043 R☉). This class of hectometric type III-like events may have simple or complex intensity-time profiles. When they have complex profiles of long duration, the decimeter emissions also have complex long-duration profiles. In this latter case they are also often associated with metric type II radio bursts and coronal mass ejections (CMEs). However, we argue on the basis of the observations that the hectometric radio emissions are not necessarily associated with the metric phenomena. Specifically, they are not likely generated by a secondary acceleration process associated with the shock generating a metric type II burst or with a shock driven ahead of the CME despite the fact that the hectometric emission time profiles would (erroneously) be morphologically classified as shock-accelerated (SA) events.