摘要
采用拱星包层物质轴对称分布的模型，计算了Ｍｉｒａ星拱星包层的物质分布和速度场分布，并通过解统计平衡方程得到了ＯＨ１８ｃｍ的四条谱线的反转区．模型假定辐射压来自中心星和尘埃本身的辐射．计算中考虑了中心星的辐射、ＯＨ分子与电子的碰撞、尘埃本身的辐射和微波背景辐射等抽运机制，计算结果基本上反映了观测到的ＯＨ脉泽的径向分布和角向分布等性质．
In this paper,we calculate the mass and velocity distribution of the envelope of Mirastars,for an axisymmetric distribution of the envelope mass.We also calculate the inversionregions of the four 18 cm lines of OH.We assume that the radiation pressure comes from thecentral star and the thermal emission of the dust itself.We consider pumping mechanismsdue to emission from the central star,collision,emission from the dust itself and cosmicmicrowave background.The model reproduces some of the general features seen in the realsources.
基金
国家自然科学基金
