紫外连续谱和H α中的色球背辐射
Chromospheric backradiation in ultraviolet continua and Halpha
摘要：
最近的一篇论文指出，来自太阳过渡区和上层色球层的紫外反向辐射强烈影响光球层顶部少数阶段的电离度，即，在该论文中提出的一维静态模型大气的温度最低。我们表明，这种说法是不兼容的观测，我们证明了相关的电离平衡，而不是主导向外光球辐射，在旧的静态模型。然后，我们分析了在上述模型中的形成，并表明，它有显着的背辐射穿过不透明度的差距，其中Halpha不同于其他强散射线。
英文摘要：
A recent paper states that ultraviolet backradiation from the solar transition region and upper chromosphere strongly affects the degree of ionization of minority stages at the top of the photosphere, i.e., in the temperature minimum of the one-dimensional static model atmospheres presented in that paper. We show that this claim is incompatible with bservations and we demonstrate that the pertinent ionization balances are instead dominated by outward photospheric radiation, as in older static models. We then analyze the formation of Halpha in the above model and show that it has significant backradiation across the opacity gap by which Halpha differs from other strong scatttering lines.
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