太阳22周峰年期间2545、2645MHz　Spike辐射资料分析  

ANALYSIS OF SPIKE EMISSIONS OBSERVED AT 2545 AND 2645 MHz IN 22ND SOLAR CYCLE

作　　者：金声震[1] 李小聪[1] 赵仁扬[1] 

机构地区：[1]中国科学院北京天文台

出　　处：《天文学报》1995年第2期173-180,共8页Acta Astronomica Sinica

基　　金：国家自然科学基金;天文委员会分支学科基金

摘　　要：本文简要地讨论了１９９１年１月至１２月太阳峰年期间在２５４５、２６４５ＭＨｚ上观测的５１个Ｓｐｉｋｅ辐射事件的高辐射流量、短持续时间、窄辐射带宽、快速频率漂移、准周期振荡和偏振成份快速变化等观测特征，并对这５１个Ｓｐｉｋｅ事件与光学耀斑及耀斑活动区磁场强度、磁位形及活动区黑子演化类型的密切关系进行了正、反向统计。鉴于Ｓｐｉｋｅ辐射的观测特征与统计特征与已知的太阳射电爆发类型和太阳射电成分的特征有很大的差异，我们认为峰年期间Ｓｐｉｋｅ辐射可能是波粒共振条件下由电子回旋脉塞不稳定性激发的一种新的射电爆发类型或一种新的太阳射电成分．In this paper, the observational features of 51 spike emissions observed at 2545and 2645 MHz in 22nd Solar Cycle, including the high flux density, the short duration, the narrow radio bandwidth, the fast frequency drift, the quasi-periodic oscillations and the rapid variations of polarization senses of spike emissions are briefly discussed.The close relations between the 51 spike emissions and the associated optical flares, the strengths and configurations of the magnetic field, the classes of the sunspot groups of the flare active regions are also outlined.Owing to the obvious differences of the observations and statistical features between the spike emissions and other solar radio bursts and solar radio components,we think that spike emissions may be a new type of solar radio burst or new component of solar radio radiation under the condition of wave-particle resonance stimulated by the instability of electro-cyclotron maser.

关 键 词：SPIKE辐射 太阳活动区 偏振 太阳射电爆发 

分 类 号：P163[天文地球—天文学]