太阳微波爆发区磁场强度诊断和误差分析

DIAGNOSTICS AND ERROR ANALYSIS OF THE MAGNETIC FIELD STRENGTHS IN SOLAR MICROWAVE BURST REGIONS

本文分析了前人利用Dulk和Marsh的射电微波爆发谱极大频率Vp近似式求解磁场强度B的方法（我们简称两参数法）在数学、物理上存在解不唯一和不自洽的问题，且相对误差高达-3．0±5．3．而我们最近提出的利用一套完整的微波爆发谱谱参数（Vp、β和Tbv）决定磁场的方法，亦即三参数法，具有B的唯一解和自洽解，精度高达±0．48．

In mis paper the inveshgahon of the magnetic field strengths in solar microwave burst regions is briefly reviewed. The diagnostic errors of the magnetic field strength B are analyzed. In previous calculations, B depends only on two parameters of the optically thin part of microwave burst spectrum, i. e., vp and β. This is based on Dulk and Marsh's simplified expression of the maximum frequency of radio microwave burst spectrum. Although the accidental error of B is merely ±8%, the value of B may be underestimated systematical in 3 times. This is house the value of electron column density, NL, given by the hard X-ray data can be overestimated in 10 times. Furthermore, the influence of Tb on B is not considered in the two-parameter method. So the uncertain error of B is about iS bines.Recently, we have presental a new method in Which B depends on a complete set of spectral parameters (vp, β and Tbv. ), and we call it the be-parament method. The evaluated predsion of B reaches ±48% in the case of gyrosynchrotron radiation.