从射电频谱指数的变化推求非热粒子能谱指数的变化

本文提出了一种由射电爆发的频谱指数α去推求电子能谱指数δ的方法;并对质子事件能谱指数和爆发峰值时的射电频谱指数之间作了相关统计,得到相关系数为0.70.以1972年8月7日15h22mUT的大爆发为例,在不同频率上进行了计算.由不同时刻的α所算得的δ值表明,在爆发峰值之前,电子能谱近似地可用幂律分布来表示;而在峰值之后,则与幂律分布有所偏离.在爆发脉冲相的20分钟时间内,δ值的变动范围约为0.4—3.6. 

The Relationship Between the Particle-Energy Spectral Index and The Microwave-Burst Power Spectral Index

In this paper we suggest a method of estimating the electron-energy spectral index (6) from the microwave radiation power spectral index (a). We have also given a tesult of the correlation statistics between the radio radiation power spectral index and the proton-energy spectral index, of which correlation coefficient is 0.70. The results of calculating 6 for the burst of August 7,1972 show that electron-energy spectrum can be approximately represented by a power-law distribution at the rise time before the peak, but deviated from the power-law distribution after the peak. The range of the values of 6 is about 0.4-3.6 at the impulsive phase of the bursts. The results of the computation also show that there is no second accelaration step presented for the white light flare of August 7, 1972. This conclusion is supported by the result of the correlation statistics, and it is also consistant with the SMM observations during the 21th cycle SMY.