CAJ | 학술논문

利用"多云模型"方法, 从云南天文台二维多波段太阳光谱仪观测到的光谱资料中导出1989年8月17日太阳西边缘的一个大的耀斑环系不同时间的视向速度场.为了解释观测速度场的主要特征,本文采用如下假设和近似:环内物质在太阳重力、磁场应力和环内气压梯度力联合作用下由环足沿螺旋磁力线上升运动. 应用MHD理论计算了它的理论速度场. 通过两者的比较发现, 计算出的速度场与第一时段的观测速度场基本相似，这似乎对耀斑物质蒸发模型提供了支持.
이용"다운모형"방법, 종운남천문태이유다파단태양광보의관측도적광보자료중도출1989년8월17일태양서변연적일개대적요반배계불동시간적시향속도장.위료해석관측속도장적주요특정,본문채용여하가설화근사:배내물질재태양중력、자장응력화배내기압제도력연합작용하유배족연라선자력선상승운동. 응용MHD이론계산료타적이론속도장. 통과량자적비교발현, 계산출적속도장여제일시단적관측속도장기본상사，저사호대요반물질증발모형제공료지지.
The observed line-of-sight velocity field at different times of alarge post-flare loop (PFL) system which occurred on the solar westernlimb on 1989 August 17is derived based on a ``multi-cloud model" (MCM) method from spectral data obtained with the two-dimensionalmulti-waveband spectra-spectroheliograph (MW-SSHG) at the Yunnan Observatory.In order to explain the fundamental features of the velocity fields observed,an assumption and approximation to be taken into account thatthe matter within a loop system rises up from the loop foot to the loop topalong the loop leg in a helical magnetic line under the combined action ofsolar gravity, magnetic stress and a gradient of atmospheric pressure inthe loop system, and a theoretical velocity field of the loopsystem is calculated with the aid of MHD theory. From a comparison of bothvelocity fields, it is found that the computed velocity field is basicallysimilar with that observed in the first duration. It seems a support tomaterial evaporation model of solar flares.