太阳质子辐射和软X射线耀斑与射电爆发间的相关研究

THE RELATIONS AMONG SOLAR PROTON EVENTS, SOFT X RAY FLARES AND RADIO BURSTS

统计分析了太阳质子事件与微波爆发和软Ｘ射线（ＳＸＲ）耀斑间的关系．结果表明：质子事件的峰值流量与微波爆发和ＳＸＲ耀斑的峰值流量、能通量间呈正的对数线性相关，相关系数０．７—０．８．根据这一统计结果和观测的微波爆发、ＳＸＲ耀斑的有关物理量，可以估算伴随的质子事件峰值流量．太阳质子辐射、ＳＸＲ耀斑和微波爆发三者间的共生关系，可以用磁环中耀斑产生的磁流体动力学过程来解释．大约３３％的质子事件没有对应的Ⅱ型爆发，这表明高能质子的加速有随机ＭＨＤ湍流加速（有Ⅱ型暴）和低频快磁声波湍动加速（无Ⅱ型暴。

The relations among solar proton events,radio bursts and soft x ray (SXR) flares are analyzed in this paper.The statistical results indicate a positive logarithmic linear correlation between the peak fluxes of proton events and the peak fluxes (energy fluxes) of radio bursts or SXR flares.The correlation coefficients have reached 0.7-0.8,so we may use the above statistical results and the observed data of solar radio bursts or SXR flares to estimate the peak fluxes of corresponding proton events. The symbiotic relations among solar proton emissions,SXR flares and microwave bursts may be interpreted with magnetohydrodynamic processes in a simple flaring loop.The processes are due to the collisional heating of nonthermal electron beams injected downward from the microwave burst source (at the top of flaring loop) into the chromosphere during the impulsive phase of solar flares.About 33% of proton events occur without associated type Ⅱ bursts.These results show that for the acceleration of energetic protons in the flaring loop there are two different processes.They are the stochastic acceleration by MHD turbulence (accompanied by type Ⅱ bursts) and the fast magnetosonic wave turbulence acceleration for low frequencies (without type Ⅱ bursts,but with γ ray flares).