用线性化分离法计算膨胀恒星大气的谱线形成  

Line Formation Calculation for an Expanding stellar Atmosphere using the Linearized Separation Method

作　　者：吴关钱 黄润乾[1] 龚志刚[1] 

机构地区：[1]中国科学院云南天文台

出　　处：《天体物理学报》1995年第2期163-173,共11页

摘　　要：本文研究了具有宏观运动的膨胀恒星大气中的辐射转移过程。详细介绍如何利用线性化分离法计算运动大气谱线形成。并采用线性化分离法计算了εＯｒｉ星的Ｈα线ＰＣｙｇｎｉ轮廓。Having carefully investigated the radiative transfer process in stellar atmospheres with extended outflowing envelopes, we present a new non-LTE atmosphere code to calculate line profiles in such stars. The line transfer is treated using the linearized separation method, which may both save computing time and have quick convergency. We use this method to analyse the Ha P Cygni profile of ε Ori and get good agreement between theoretical and observational profiles.

关 键 词：恒星大气 辐射转移 数值计算 谱线 线性化分离法 

分 类 号：P142.4[天文地球—天体物理]