SHINE Postdoc: Extension of the Breakout Model to More 'Realistic' Coronal Mass Ejections

该项目将支持一名博士后对日冕物质抛射(CME)的3D爆发模型和用于生成数值解的工具进行重大改进。这位博士后打算首次在来自实际观测的磁场环境中对爆发模型进行磁流体动力学(MHD)数值模拟。他计划通过对源表面以下的场进行球谐展开，将势场源-源磁场落实到初始化程序中。然后，博士后将把这些加入到源表面上方的无外力开放领域解决方案中。他还打算在模拟中加入更真实的表面运动，最终目标是发展将任意光球层速度和表面场变化输入日冕MHD解决方案演变的能力。博士后将使用专门的通量浮现计算的结果来驱动他的爆发喷发模拟的边界条件，以查看爆发喷发过程是否实际上独立于用来建立所需自由磁能的特定方法。最后，博士后希望能够将从局部相关跟踪(LCT)计算得出的实际太阳表面运动参数化，以查看现实驾驶是否可以在现实的场配置中触发CME爆发。

This project will support a postdoctoral to make major improvements to the 3D breakout model for coronal mass ejections (CMEs) and to the tools used to generate the numerical solutions. The postdoctoral intends to run numerical magnetohydrodynamic (MHD) simulations of the breakout model for the first time in magnetic field environments derived from actual observations. He plans to implement potential-field source-source magnetic fields into initialization procedures through spherical harmonic expansions for fields below the source-surface. The postdoctoral will then join these to a force-free open-field solution above the source-surface. He also intends to add more realistic surface motions to the simulations, with the ultimate goal of developing the capacity to input arbitrary photospheric velocity and surface field changes into the evolution of the coronal MHD solution. The postdoctoral will use the results of dedicated flux-emergence calculations to drive the boundary conditions of his breakout eruption simulation, in order to see if the break-out eruption process is, in fact, independent of the specific method used to build up the required free magnetic energy. Finally, the postdoctoral expects to be able to parameterize actual solar surface motions, as derived from local correlation tracking (LCT) calculations, to see if realistic driving can trigger CME eruptions in realistic field configurations.