Formation of P Cygni Line Profiles in Relativistically Expanding Atmospheres. II. The Effect of the Continuum Frequency Shape and Limb Darkening of the Core
Formation of P Cygni Line Profiles in Relativistically Expanding Atmospheres. II. The Effect of the Continuum Frequency Shape and Limb Darkening of the Core
复制标题
相对论膨胀大气中天鹅座 P 线剖面的形成。
DOI：
10.1086/173294
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
D. Hutsemékers
中科院分区：
文献类型：
--
作者：
D. Hutsemékers
在球对称膨胀大气中线辐射传递的相对论Sobolev理论的框架下，我们研究了潜在连续体的频率形状（幂律）对天鹅座P线轮廓的影响，以及核心最终边缘变暗的影响。我们发现，由于边缘变暗的影响与经典极限一样小。相反，线的轮廓强烈地依赖于表征连续体形状的幂律指数，即使是在流速适中的情况下也是如此。当谱线轮廓的吸收部分基本保持不变时，发射部分可能显著移位、增强或降低，直至几乎完全消失
In the framework of the relativistic Sobolev theory for the transfer of line radiation in spherically symmetric expanding atmospheres, we investigate the effect on P Cygni line profiles of the frequency shape of the underlying continuum (a power law), as well as the influence of an eventual limb darkening of the core. We find that the effects due to limb darkening are small as in the classical limit. On the contrary, the line profiles strongly depend on the power-law index characterizing the continuum shape, even for moderate values of the terminal velocity of the flow. While the absorption part of the line profiles remains essentially unchanged, the emission part may be significantly displaced, enhanced, or lowered up to nearly complete disappearance