关于补偿修正的太阳组成所需的不透明度变化
On the opacity change required to compensate for the revised solar composition
摘要：
最近对太阳成分测定的修正导致了太阳模型与日震推论的明显不一致。组成变化对模型的影响很大程度上是由不透明度的变化引起的。因此，我们希望确定一个内在的不透明度的变化，将补偿组成的修订。通过比较模型计算与旧的和修订的组成，我们确定所需的不透明度的变化。模型计算的不透明度，从而修改和日震反演中作为参考，以确定太阳和模型之间的差异声速。不透明度的增加从对流区底部附近的30%左右到太阳核心的百分之几，导致了声速剖面，修改后的组成与原始太阳模型基本上没有区别。作为温度对数的函数，这可以用简单的三次拟合很好地表示。然而，这种变化的物理现实性仍然存在争议。
英文摘要：
Recent revisions of the determination of the solar composition have resulted in solar models in marked disagreement with helioseismic inferences. The effect of the composition change on the model is largely caused by the change in the opacity. Thus we wish to determine an intrinsic opacity change that would compensate for the revision of the composition. By comparing models computed with the old and revised composition we determine the required opacity change. Models are computed with the opacity thus modified and used as reference in helioseismic inversions to determine the difference between the solar and model sound speed. An opacity increase varying from around 30 per cent near the base of the convection zone to a few percent in the solar core results in a sound-speed profile, with the revised composition, which is essentially indistinguishable from the original solar model. As a function of the logarithm of temperature this is well represented by a simple cubic fit. The physical realism of such a change remains debatable, however.
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