A Model of Magnetic Reconnection Driving Large-Scale Activity in a Complex Solar Corona

复杂日冕中驱动大规模活动的磁重联模型

• 批准号: 9733424
• 负责人: Dana Longcope
• 金额: $ 25.7万
• 依托单位: Montana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-12-15 至 2001-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733424&HistoricalAwards=false
• 关键词: Model; Magnetic; Reconnection; Driving; Large

Our Sun's corona, a tenuous, hot atmosphere above the visible surface of the sun, is the most dramatic, variable component of solar activity. The PI develops a global model of a complex, evolving corona, based on the hypothesis that coronal activity results from surface motions stressing its magnetic field. Numerical implementation of the model, applied to observations of coronal evolution, tests this hypothesis. Statistical studies of the model provide quantitative estimates for flaring frequency/amplitude, distribution of coronal loop lengths, and total heat supplied by magnetic stressing. The PI is also developing a computational physics curriculum for undergraduates, allowing students to participate more fully in departmental research.

太阳的日冕是太阳可见表面之上的一层稀薄的热大气，是太阳活动中最引人注目、最多变的组成部分。PI开发了一个复杂的、不断演变的日冕全球模型，该模型基于日冕活动是由地表运动对其磁场施加压力造成的假设。该模型的数值实现应用于日冕演化的观测，验证了这一假设。该模型的统计研究提供了耀斑频率/振幅、日冕环长度分布和磁应力提供的总热量的定量估计。PI还在为本科生开发计算物理课程，让学生更充分地参与系里的研究。