论文标题
电场源表面模型的椭圆形膨胀
An elliptic expansion of the potential field source surface model
论文作者
论文摘要
语境。潜在的场源表面模型经常用作进一步的科学研究的基础，而综合冠状磁场很重要。它的参数，尤其是源表面的位置和形状，对于解释星际介质的状态至关重要。已经提出了改进，将一个或多个附加的免费参数引入模型，例如当前表源表面（CSSS）模型。 目标。放松源表面的球形约束并使其成为椭圆形，使建模者可以选择将其变形以更准确地匹配要分析的特定周期或位置的物理环境。 方法。提出了一个数值求解器，该求解器使用有限的差异在三维网格上求解拉普拉斯方程。该求解器能够处理结构化的球形网格，这些网格可以变形以创建椭圆形源表面。 结果。使用该新求解器提出了冠状磁场的配置。在太阳能电晕中不同高度处的磁性构型的卡林顿样效果图补充了三维效果图。说明了由球形和椭圆模型计算出的磁构型的差异。
Context. The potential field source surface model is frequently used as a basis for further scientific investigations where a comprehensive coronal magnetic field is of importance. Its parameters, especially the position and shape of the source surface, are crucial for the interpretation of the state of the interplanetary medium. Improvements have been suggested that introduce one or more additional free parameters to the model, for example, the current sheet source surface (CSSS) model. Aims. Relaxing the spherical constraint of the source surface and allowing it to be elliptical gives modelers the option of deforming it to more accurately match the physical environment of the specific period or location to be analyzed. Methods. A numerical solver is presented that solves Laplace's equation on a three-dimensional grid using finite differences. The solver is capable of working on structured spherical grids that can be deformed to create elliptical source surfaces. Results. The configurations of the coronal magnetic field are presented using this new solver. Three-dimensional renderings are complemented by Carrington-like synoptic maps of the magnetic configuration at different heights in the solar corona. Differences in the magnetic configuration computed by the spherical and elliptical models are illustrated.
