太阳射电米波毫秒快速尖峰辐射事件的统计分析

The Statistical Analysis of the Millisecond Fine-Structure Events of Solar Metric Waves

统计分析了云南天文台声光频谱仪在２２周峰年期间记录到的米波尖锋事件与光学活动及相关事件的关系。从它们的观测特征：短寿命，窄频带，频率快速漂移，及尖峰事件与磁结构复杂的大黑子活动区密切相关等，认为这些事件的辐射机制可能是电子回旋脉泽不稳定直接放大电磁波所致。

The relations among the metric wave spike events, optical activities and related events recorded with the acousto-optical spectrograph during the 22nd solar cycle are statistically analysed in this article. From some characteristics observed,such as the short lift time, narrow frequency band, fast frequency drift, quasi-periodic pulsation, spike event and complex magnetic structure,it is considered that the radiation mechanism of these events may be principally due to the electromagnetic waves magnified directly by the instable electronic cyclotron.