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

SHINE 博士后：将爆发模型扩展到更“现实”的日冕物质抛射

• 批准号: 0621725
• 负责人: Janet Luhmann
• 金额: $ 16.03万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0621725&HistoricalAwards=false
• 关键词: SHINE; Postdoc; Extension; Breakout; Model

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.

该项目将支持博士后对日冕物质抛射（CME）的3D突破模型和用于生成数值解的工具进行重大改进。博士后打算在来自实际观测的磁场环境中首次运行突破模型的数值磁流体动力学（MHD）模拟。他计划通过源表面以下的场的球谐展开将位场源-源磁场实施到初始化程序中。然后博士后将这些加入到源表面上方的无力开放场解决方案中。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速度和表面场变化输入日冕MHD解的能力。博士后将使用专门的通量出现计算的结果来驱动他的突破喷发模拟的边界条件，以查看突破喷发过程实际上是否独立于用于建立所需自由磁能的特定方法。最后，博士后希望能够参数化实际的太阳表面运动，从本地相关跟踪（LCT）计算得出，看看现实的驾驶是否可以触发CME爆发在现实的领域配置。