太阳黑子的日震学：用波传播的三维MHD模拟对抗观测
Helioseismology of Sunspots: Confronting Observations with Three-Dimensional MHD Simulations of Wave Propagation
摘要：
利用SOHO/MDI多普勒时间互相关观测了太阳波通过AR 9787黑子的传播。然后，我们使用三维MHD数值模拟计算波包通过自相似磁流体静力学太阳黑子模型的传播。模拟的设置方式允许与观测到的交叉协方差进行比较（除了太阳黑子附近）。我们发现，模拟和f-模式的观测是在很好的协议时，模型太阳黑子有一个峰值场强为3千克的光球，所以较低的场强。用日震学约束太阳黑子模型是可能的，因为磁场对波的直接影响已经被充分考虑。我们的工作表明，太阳黑子的全波形模拟是可行的。
英文摘要：
The propagation of solar waves through the sunspot of AR 9787 is observed using temporal cross-correlations of SOHO/MDI Dopplergrams. We then use three-dimensional MHD numerical simulations to compute the propagation of wave packets through self-similar magneto-hydrostatic sunspot models. The simulations are set up in such a way as to allow a comparison with observed cross-covariances (except in the immediate vicinity of the sunspot). We find that the simulation and the f-mode observations are in good agreement when the model sunspot has a peak field strength of 3 kG at the photosphere, less so for lower field strengths. Constraining the sunspot model with helioseismology is only possible because the direct effect of the magnetic field on the waves has been fully taken into account. Our work shows that the full-waveform modeling of sunspots is feasible.
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