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arXiv 2103.03789astro-ph.SR
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太阳光球磁场特性与统计流关系的数值模拟及磁特征跟踪

Relationship between magnetic field properties and statistical flow using numerical simulation and magnetic feature tracking on solar photosphere

K. Takahata, H. Hotta, Y. Iida, T. Oba

摘要:

我们进行辐射磁流体动力学计算的太阳宁静区调查的依赖性的统计流的磁性和三维(3D)结构的磁补丁在存在的大规模流动,模仿差分旋转。已经证实,强磁场斑块在太阳表面的纵向移动更快。因此,强磁补丁更深入地渗透到太阳内部。深层磁斑的运动受深层较快的微分转动的影响。在这项研究中,我们使用R2D2代码进行现实的辐射磁流体动力学计算,以验证较强的补丁有更深的根源。我们还添加了大规模的流动来模拟差分旋转。自动检测和跟踪磁块,并评估30,000个磁块的深度。然后在光球层测量了290万个磁斑的速度。我们得到的依赖这些值的磁性,如磁场强度和通量。我们的研究结果证实,强磁补丁往往表现出更深的根源和更快的运动,我们比较我们的结果与观测使用的点扩散函数的仪器在日出和太阳动力学天文台(SDO)。我们的结果是定量一致的SDO以前的观测结果。

英文摘要:

We perform radiative magnetohydrodynamic calculations for the solar quiet region to investigate the dependence of statistical flow on magnetic properties and the three-dimensional (3D) structure of magnetic patches in the presence of large-scale flow that mimics differential rotation. It has been confirmed that strong magnetic field patches move faster in the longitudinal direction at the solar surface. Consequently, strong magnetic patches penetrate deeper into the solar interior. The motion of the deep-rooted magnetic patches is influenced by the faster differential rotation in the deeper layer. In this study, we perform realistic radiative magnetohydrodynamic calculations using R2D2 code to validate that stronger patches have deeper roots. We also add large-scale flow to mimic the differential rotation. The magnetic patches are automatically detected and tracked, and we evaluate the depth of 30,000 magnetic patches. The velocities of 2.9 million magnetic patches are then measured at the photosphere. We obtain the dependence of these values on the magnetic properties, such as field strength and flux. Our results confirm that strong magnetic patches tend to show deeper roots and faster movement, and we compare our results with observations using the point spread function of instruments at the Hinode and Solar Dynamics Observatory (SDO). Our result is quantitatively consistent with previous observational results of the SDO.

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