The influence of Stark broadening on Cr II spectral line shapes in stellar atmospheres
The influence of Stark broadening on Cr II spectral line shapes in stellar atmospheres
复制标题
斯塔克展宽对恒星大气中 Cr II 谱线形状的影响
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Dacic
中科院分区：
文献类型：
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作者：
M. Dimitrijević;T. Ryabchikova;Z. Simic;L. Popović;M. Dacic
目标。我们考虑了Stark展宽对在主序中部的恒星大气中观察到的CrII谱线形状的影响。方法：研究方法。用半经典微扰方法计算了斯塔克展宽参数。对于恒星光谱合成，使用了用于合成光谱计算的SYNTH程序的改进版本Synth3。结果。计算了属于4S−4P跃迁的7个多重态的CrII谱线的斯塔克展宽参数。将新计算的斯塔克参数应用于富铬星HD-133792光谱中观察到的CrII线轮廓的分析。结论。我们发现Stark展宽机制是非常重要的，应该考虑到，特别是在研究铬丰度分层时。
Aims. We consider the effect of Stark broadening on the shapes of Cr ii spectral lines observed in stellar atmospheres of the middle part of the main sequence. Methods. Stark broadening parameters were calculated by the semiclassical perturbation approach. For stellar spectra synthesis, the improved version synth3 of the code synth for synthetic spectrum calculations was used. Results. Stark broadening parameters for Cr ii spectral lines of seven multiplets belonging to 4s − 4p transitions were calculated. New calculated Stark parameters were applied to the analysis of Cr ii line profiles observed in the spectrum of Cr-rich star HD 133792. Conclusions. We found that Stark broadening mechanism is very important and should be taken into account, especially in the study of Cr abundance stratification.