论文标题
在准三维配置上
On the quasi-three dimensional configuration of magnetic clouds
论文作者
论文摘要
我们开发了一种优化方法，以基于三个维度的线性自由公式制定磁性云的磁场构型。这种被称为弗雷德伯格溶液的解决方案是与公理对称的隆德奎斯特溶液的亲属，但具有更一般的“螺旋对称性”。我们的方法的优点是通过将其应用于两个原位测量磁云的案例研究来证明的。两种产量的结果减少了$χ^2 \约1 $。案例1显示了具有一个主要极性的绕线通量绳构型。案例2展示了双螺旋构型，有两个磁通束相互缠绕，并植根于混合极性区域。这项研究证明了磁云结构的三维复杂性。
We develop an optimization approach to model the magnetic field configuration of magnetic clouds, based on a linear-force free formulation in three dimensions. Such a solution, dubbed the Freidberg solution, is kin to the axi-symmetric Lundquist solution, but with more general "helical symmetry". The merit of our approach is demonstrated via its application to two case studies of in-situ measured magnetic clouds. Both yield results of reduced $χ^2\approx 1$. Case 1 shows a winding flux rope configuration with one major polarity. Case 2 exhibits a double-helix configuration with two flux bundles winding around each other and rooted on regions of mixed polarities. This study demonstrates the three-dimensional complexity of the magnetic cloud structures.
