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外文期刊>The Astrophysical journal
>RECOVERING PHOTOSPHERIC VELOCITIES FROM VECTOR MAGNETOGRAMS BY USING A THREE-DIMENSIONAL, FULLY MAGNETOHYDRODYNAMIC MODEL
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RECOVERING PHOTOSPHERIC VELOCITIES FROM VECTOR MAGNETOGRAMS BY USING A THREE-DIMENSIONAL, FULLY MAGNETOHYDRODYNAMIC MODEL
We use a numerical simulation method for recovering the photospheric velocity field from the vector magnetograms. The traditional method is local correlation tracking (LCT), which is based on measuring the relative displacements of features in blocks of pixels between successive white-light images or magnetograms. Within this method, there are a variety of implementations. One of recently developed implementations is induction local correlation tracking (ILCT) as described by Welsch and coworkers. They employ the normal component of magnetic induction equation as a constraint to assure consistent solutions. Our numerical method uses the fully three-dimensional MHD equations to recover the photospheric velocity field with individual vector magnetograms. We compare our method to the ILCT method using NOAA AR 8210 as an example. The differences and similarities are discussed in detail.
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机译：我们使用数值模拟方法从矢量磁图恢复光球速度场。传统方法是局部相关跟踪（LCT），该方法基于测量连续白光图像或磁图之间的像素块中特征的相对位移。在这种方法中，有多种实现方式。如Welsch和同事所述，最近开发的一种实现是归纳局部相关跟踪（ILCT）。他们采用磁感应方程的法线分量作为约束来确保一致的解。我们的数值方法使用完整的3维MHD方程式来恢复具有单个矢量磁图的光球速度场。我们将我们的方法与以NOAA AR 8210为例的ILCT方法进行比较。差异和相似之处将详细讨论。
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