SHINE: Using Magnetohydrodynamic (MHD) Simulations to Test Methods of Measuring Photospheric Velocities

SHINE：使用磁流体动力学 (MHD) 模拟来测试测量光球速度的方法

• 批准号: 0327712
• 负责人: William Abbett
• 金额: $ 8.45万
• 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: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0327712&HistoricalAwards=false
• 关键词: SHINE; Using; Magnetohydrodynamic; MHD; Simulations

Numerical simulations aimed at forecasting solar Coronal Mass Ejections (CMEs) require specification of the actual velocity field of the plasma at the solar photosphere. This information must be "derived" from proxy magnetogram observations, and this can lead to errors and inaccuracies in the inferred flow fields. Realistic numerical simulations of solar magnetoconvection will be employed to simulate synthetic magnetograms. Then using schemes provided by observers in the SHINE community the velocity field will be "derived" through, (i) local-correlation tracking, (ii) feature tracking, and (iii) minimum energy fitting techniques. By comparing these inferred velocity fields against the known flows one may, (i) identify which methods most accurately determine velocities, (ii) characterize pathologies in the methods, (iii) suggest ways to remedy these pathologies, and (iv) disseminate these results to the many users of these methods in the solar physics/SHINE communities.

旨在预测太阳冠状质量弹出（CME）的数值模拟需要在太阳光球处规范等离子体的实际速度场。 该信息必须从代理磁力图观察中“得出”，这可能会导致推断流场中的错误和不准确性。 将使用太阳能传染的现实数值模拟来模拟合成磁图。 然后，使用Shine社区中观察员提供的方案，速度字段将通过（i）局部相关跟踪，（ii）特征跟踪和（iii）最小能量拟合技术“得出”。 通过将这些推断的速度场与已知流量进行比较，可以（i）确定哪些方法最准确地确定了速度，（ii）表征方法中的病理学，（iii）提出了纠正这些病理学的方法，（iiv）（iv）将这些结果传递给Solar Anderics/Shine Shine Communities中这些方法的许多用户。