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.

旨在预测太阳日冕物质抛射 (CME) 的数值模拟需要指定太阳光球层等离子体的实际速度场。 该信息必须从代理磁图观测中“导出”，这可能导致推断的流场出现错误和不准确。 将采用太阳磁对流的真实数值模拟来模拟合成磁图。 然后，使用 SHINE 社区中的观察者提供的方案，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“导出”速度场。 通过将这些推断的速度场与已知的流进行比较，我们可以（i）确定哪种方法最准确地确定速度，（ii）描述方法中的病理特征，（iii）提出补救这些病理的方法，以及（iv）将这些结果传播给太阳物理/SHINE社区中这些方法的许多用户。