第21、22周峰年太阳射电爆发中毫秒级精细结构的分析

AN ANALYSIS OF THE MILLISECOND FAST FINE STRUCTURES OF SOLAR RADIO BURSTS DURING SOLAR CYCLE 21,22

本文对第21周的2840MHz及22周峰年的2545MHz，2645MHz和2840MHz波段上所观测到的285个快速事件进行分析，发现两个峰年的快速事件具有多种多样的快速活动（快速精细结构）．它们与耀斑的对应关系也做了统计分析．

In this paper, 285 fast events at 2545 MHz, 2645 MHz and 2840 MHz recorded during the 21st and 22nd solar activity cycles are analysed. Various kinds of the fast events are found during that period. It is found that the fast fine structures (FFS)observed during the two solar maxim are very different, for example, the discrete and isolated spikes, the clusters of the crowded spikes, the spikes superimposing on the noise background, and the phenomena of absorption occurring in solar cycle 21, and events with more narrow bandwidths, frequency drifts, polarization and the quasi-periodic oscillations occurring in solar cycle 22. In addition, the rate of FFS occurrence are also different for the two cycles. Some events associated with solar flares are analysed, too.