太阳微波射电快速精细结构亚类型的观测分析

通过分析"云南天文台4波段太阳射电快速同步观测系统"1990-01-1994－01取得的103个射电爆发，发现其中29个存在不同类型的快速精细结构（FFS）．尤其是发现了几个少见的亚类FFS现象．本文仅介绍两个亚类型：窄带变周期脉动和宽带慢漂移长周期脉动．这些现象表明太阳射电FFS的多样性，它们发生在射电爆发的不同阶段（耀斑不同相），从而说明在耀斑演化中日冕非热电子的加速或注入可能贯穿于整个耀斑发展过程．由于耀斑后相FFS的发生，可验证耀斑后相存在磁重联和似环结构（耀斑后环）的重新形成．由于不同的亚类FFS反映日冕中存奇特别的环境条件，从而推测日冕中可能存在更复杂的多重类型的磁结构．

THE OBSERVATION ANALYSIS FOR THE SUBTYPES OF FAST FINE STRUCTURES OF SOLAR MICROWAVE RADIO RADIATION

29 fast fine strUCtUres (FFS) were found after analizing lO3 edo bUrStS observedfr0m Janump l990 t0 January l994 with the 4-frequency (l.42, 2'l3, 2.84 and 4.26Gth) solar rado high temPoral resolution synchron0us system at Yunnan Observatory.SPecially, 2 rare subtyPes of the FFS, i.e. narrow-band Period vmping Pulsation andwideband slowly drifting long-periodic Pulsahon were found. 0ne occuered ddring theimPulsive Phase 0f flare and the other during the decaying Phase- Ths shows thatcoronal nonthermal electr0n anceleration / injechon process may go through the wholedevelopment process of flares. ndo FFS may be regardd as the evidence ofndcarenergy release of flares, and resulhng from the nonthermal electron acceleration /injechon. The many information abollt the ndcmtwta of the hme and sPaCe inflares asceleration mechhosm may be extheted from FFS. Genetally, the basic processof energy release is the illtomehon betWeen different magnehc stfUCbes, and hencethere may exist the magnehc reconnechon in the POst Phase of flare and the refondngof loop-like strUctures (Postflare loops) by the existence of FFS of the post Phase offlares.The unusual subtypes of FFS introduced here may reflect the specific environmntal conditions existing in corona even though their radation mechanism is the same as the basic types of FFS. Some complex and multi-type magnetic structures in coronamay be suggested by the various subtypes of FFS.