Collaborative Research: Testing a New Concept for the Long-term Build-up to Coronal Mass Ejections

合作研究：测试日冕物质抛射长期积累的新概念

• 批准号: 0837841
• 负责人: Terry Forbes
• 金额: $ 6.48万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-12-01 至 2012-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0837841&HistoricalAwards=false
• 关键词: Collaborative; Research; Testing; New; Concept

The Principal Investigator (PI) has assembled an international collaboration to test whether coronal mass ejection (CME) build-up can be ascribed to a four-stage process of magnetic field evolution that ultimately leads to the triggering of a CME. This four stage process consists of (1) canceling of magnetic fields along a polarity reversal boundary; (2) formation of a filament channel concurrent with the ascent of horizontal magnetic field into the chromosphere from cancellation sites; (3) thread-by-thread formation of a filament magnetic field and visible filament when the filament channel attains maximum development; and finally, (4) thread-by-thread building of the filament cavity magnetic field as mass drains from the visible threads, thereby incrementally releasing filament magnetic field into the cavity magnetic field until one of many possible triggering mechanisms initiates the CME. The PI's team will examine these distinct stages and the mechanisms linking them, taking advantage of the synergy offered by new observations, data analysis, numerical modeling, analytic theory, and laboratory plasma experiments. The PI's team expects this project to provide a greatly improved understanding of how CMEs originate and evolve. This improved knowledge of the CME environment is needed to develop predictive tools so that critical space weather events can be accurately forecast.

首席研究员（PI）已经召集了一个国际合作，以测试日冕物质抛射（CME）的建立是否可以归因于磁场演化的四个阶段，最终导致CME的触发。这一过程分为四个阶段：（1）磁场沿着极性反转边界的抵消，（2）与水平磁场从抵消点上升到色球层的同时形成暗条通道，（3）当暗条通道达到最大发展时，一条一条地形成暗条磁场和可见暗条，（4）暗条通道的形成是暗条通道的一个重要阶段。以及最后，（4）随着质量从可见线排出，一根接一根地建立细丝腔磁场，从而逐渐将细丝磁场释放到腔磁场中，直到许多可能的触发机制之一启动CME。PI的团队将研究这些不同的阶段和连接它们的机制，利用新的观察，数据分析，数值模拟，分析理论和实验室等离子体实验提供的协同作用。PI的团队希望这个项目能够大大提高对CME如何起源和演变的理解。需要改进对CME环境的了解，以开发预测工具，从而可以准确预测关键的空间天气事件。