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arXiv 1409.0465astro-ph.SR
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太阳Ba II D2 4554 A谱线中量子干涉和部分再分配的作用

The role of quantum interference and partial redistribution in the solar Ba II D2 4554 A line

H. N. Smitha, K. N. Nagendra, J. O. Stenflo, M. Sampoorna

摘要:

4554 A处的Ba II D2线是一个很好的例子,其中由于奇数同位素产生的F态干扰效应产生的偏振分布与那些没有表现出F态干扰的偶数同位素的偏振分布非常不同。因此,有必要考虑不同同位素的贡献,以了解这条线的观测线性偏振分布。在本文中,我们提出了辐射转移模型与部分频率重分布(PRD),这是必不可少的模拟这条线。这是因为完全频率再分布(CRD)不能再现所观察到的机翼极化。我们提出了观察和计算的Q/I的配置文件在不同的肢体距离。理论廓线强烈依赖于临边距离(μ),而在其它μ位置,拟合临边观测的模式大气则失效。

英文摘要:

The Ba II D2 line at 4554 A is a good example, where the F-state interference effects due to the odd isotopes produce polarization profiles, which are very different from those of the even isotopes that do not exhibit F-state interference. It is therefore necessary to account for the contributions from the different isotopes to understand the observed linear polarization profiles of this line. In this paper we present radiative transfer modeling with partial frequency redistribution (PRD), which is shown to be essential to model this line. This is because complete frequency redistribution (CRD) cannot reproduce the observed wing polarization. We present the observed and computed Q/I profiles at different limb distances. The theoretical profiles strongly depend on limb distance (μ) and the model atmosphere which fits the limb observations fails at other μ positions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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