用简正模耦合验证环形流的反演
Validating inversions for toroidal flows using normal-mode coupling
摘要：
简正模耦合是一种日震技术，它利用模本征函数的测量来推断太阳的内部结构。这项技术使人们对太阳内部环形流的演变和结构有了深入的了解。在这里，我们通过生成与输入流相关联的合成地震测量值并比较输入和反演速度来验证法向模耦合的反演算法。我们研究了四种不同的情况下，输入环形流和计算合成，考虑到部分可见的太阳。我们使用减法最优局部化的AZERTAGE（SOLA）反演合成，并试图减轻模式泄漏的系统性。我们证明，最终，反演是一样好的模型，我们假设流速之间的相关性。
英文摘要：
Normal-mode coupling is a helioseismic technique that uses measurements of mode eigenfunctions to infer the interior structure of the Sun. This technique has led to insights into the evolution and structure of toroidal flows in the solar interior. Here, we validate an inversion algorithm for normal-mode coupling by generating synthetic seismic measurements associated with input flows and comparing the input and inverted velocities. We study four different cases of input toroidal flows and compute synthetics that take into account the partial visibility of the Sun. We invert the synthetics using Subtractive Optimally Localized Averages (SOLA) and also try to mitigate the systematics of mode leakage. We demonstrate that, ultimately, inversions are only as good as the model we assume for the correlation between flow velocities.
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