HALE 17590 活动区的爆发辐射

本文根据1981年HALE 17590 太阳活动区的观测资料,着重分析了它的射电辐射特性后发现:(1)在光学活动区发展的上升阶段,每串射电爆发的强度也有由弱到强的变化,其频谱由单调谱变成不规则谱和U型谱;(2)对大的耀斑爆发而言,射电爆发的先兆相比X射线爆早。在射电先兆相期间常伴有谱斑增亮和暗条激活等现象;(3)大耀斑爆发的脉冲极大时刻在射电8毫米波段到来最早。 

THE RADIO BURST RADIATION OF HALE 17590 ACTIVE REGION

Basing upon the observations of HALE 17590 active region,we investigated the radiation characteristics of radio bursts of this active region and found that: 1) In the rising period of development of the active region,there is also a corresponding change in intensity from weak to strong for each series of radio bursts,while the spectrum changes from monotonic to irregular or U type.2) For large flare bursts,the occurrences of the precursor phase are earlier in radio bursts than in X-ray bursts.The precursor radiation in radio bursts often companys with activation of filaments and enhancement of brightness of plage and so on.3) For large flare bursts,the time of impulsive maximum comes firstly in 8 mm wavelengh.