论文标题
在具有不同初始条件的耀斑生产活性区域中的三维磁场结构外推
Extrapolation of Three-dimensional Magnetic Field Structure in Flare-productive Active Regions with Different Initial Conditions
论文作者
论文摘要
非线性力场（NLFFF）建模已被广泛用作推断三维（3D）磁场结构的工具。在这项研究中，研究了NLFFF计算相对于3D磁场的初始猜测的依赖性。虽然先前研究的主要部分将潜在的领域用作NLFFF建模的初始猜测，但我们采用了具有不同无恒定恒定alpha的无线性力场作为初始猜测。这种方法使我们能够研究NLFFF推断相对于初始猜测获得的磁场的独特之处。在强磁场区域，NLFFF外推的初始条件的依赖性较小。因此，尽管Lorentz力集中在较低的高度上，但高度（$ <10 $ mm）的磁场往往会受到初始条件（相关系数C> 0.9的相关系数C> 0.9）的影响较小。
The nonlinear force-free field (NLFFF) modeling has been extensively used as a tool to infer three-dimensional (3D) magnetic field structure. In this study, the dependency of the NLFFF calculation with respect to the initial guess of the 3D magnetic field is investigated. While major part of the previous studies used potential field as the initial guess in the NLFFF modeling, we adopt the linear force-free fields with different constant force-free alpha as the initial guesses. This method enables us to investigate how unique the magnetic field obtained by the NLFFF extrapolation with respect to the initial guess is. The dependence of the initial condition of the NLFFF extrapolation is smaller in the strong magnetic field region. Therefore, the magnetic field at the lower height ($< 10$ Mm) tends to be less affected by the initial condition (correlation coefficient C>0.9 with different initial condition), although the Lorentz force is concentrated at the lower height.
