On the polarization of resonantly scattered emission lines – I. Emission and absorption coefficients in an anisotropic radiation field
On the polarization of resonantly scattered emission lines – I. Emission and absorption coefficients in an anisotropic radiation field
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关于共振散射发射线的偏振 – I. 各向异性辐射场中的发射和吸收系数
DOI：
10.1093/mnras/267.2.303
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发表时间：
1994
影响因子：
4.8
通讯作者：
L. Western
中科院分区：
文献类型：
--
作者：
Hee;R. Blandford;L. Western
在L-S耦合极限下，计算了各种允许的电偶极跃迁下，各向异性辐射场中极化辐射的源函数和散射系数。碰撞，辐射和磁混合的地面子级都被认为是。自洽的，出射辐射场的偏振计算，使用各向异性逃逸概率形式主义治疗的辐射传输。结果发现，辐射混合可以增强大角动量跃迁的偏振，小角动量跃迁的偏振度小于或约为10%。
Source functions and absorptions coefficients for polarized radiation in a given ansiotropic radiation field are calculated for a variety of permitted electric dipole transitions in the L-S coupling limit. Collisional, radiative and magnetic mixing of the ground sublevels are all considered. The polarization of the self-consistent, emergent radiation field is computed, using an anisotropic escape probability formalism to treat the radiative transfer. It is found that the radiative mixing can enhance the polarization for transitions with large angular momentum, and degrees of polarization less than or approximately 10 per cent are obtained for transitions with small angular momentum.