Expanding atmospheres in non-LTE:: Radiation transfer using short characteristics

被引:27
作者
Koesterke, L [1 ]
Hamann, WR [1 ]
Gräfener, G [1 ]
机构
[1] Univ Potsdam, D-14469 Potsdam, Germany
关键词
radiative transfer; methods : numerical; stars : atmospheres;
D O I
10.1051/0004-6361:20011573
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present our technique for solving the equations of radiation transfer in spherically expanding atmospheres. To ensure an efficient treatment of the Thomson scattering, the mean intensity J is derived by solving the moment equations in turn with the angle-dependent transfer equation. The latter provide the Eddington factors. Two different methods for the solution of the angle dependent equation are compared. Thereby the integration along short characteristics turned out to be superior in our context over the classical differencing scheme. The method is the basis of a non-LTE code suitable for the atmospheres of hot stars with high mass-loss.
引用
收藏
页码:562 / 567
页数:6
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