Theoretical Studies of Solar Flares

太阳耀斑的理论研究

• 批准号: 8822366
• 负责人: Alexander McClymont
• 金额: $ 24.35万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8822366&HistoricalAwards=false
• 关键词: Theoretical; Studies; Solar; Flares

The objectives of this research are twofold: to understand dynamics and energy transport in the impulsive phase of flares, and to understand the origins of flare energy. Specifically, the aim is to: further understand gasdynamics and radiation transfer in the chromosphere during the impulsive phase of flares; develop diagnostics of energy transport in the impulsive phase of flares which are applicable to H alpha observations; ascertain what can and cannot be learned from vector magnetograms and examine methods for the extrapolation of force-free magnetic fields from such data; study the stability of preflare coronal magnetic fields and the role of MHD instabilities in flare initiation; investigate the interaction of sub-photospheric flows with the footprints of coronal magnetic field lines, to determine the source of flair energy. The investigators will attack these problems theoretically, using both analytic and numerical techniques applied to the gasdynamic, radiation transfer, and magnetohydrodynamic equations. The work on chromospheric flare dynamics and force-free fields will assist in interpreting data from ground-based solar optical telescopes during the solar maximum of 1991. Studies of flare energy generation touch on fundamental questions relating to the solar dynamo and the solar cycle, and will suggest observational tests of flare mechanisms.

本研究的目的有两个：了解 耀斑脉冲阶段的动力学和能量传输， 并了解耀斑能量的起源。 具体而言是 目的是：进一步了解气体动力学和辐射传输 在耀斑的脉冲阶段在色球层中;发展 耀斑脉冲相能量输运的诊断 适用于H α观测;确定什么可以 也不能从矢量磁图中得知， 从磁场中外推无力磁场的方法 研究耀斑前日冕磁场的稳定性 磁场和磁流体动力学不稳定性在耀斑起始中的作用 研究次光球流与 日冕磁场线的足迹，以确定 天赋能量的来源。 调查人员将从理论上解决这些问题， 使用分析和数值技术应用于 气体动力学、辐射传递和磁流体动力学 方程 色球耀斑动力学和无力 场将有助于解释来自地面太阳能数据 1991年太阳活动高峰期的光学望远镜。 研究 耀斑能量产生涉及有关 太阳发电机和太阳活动周期， 耀斑机制的观测试验。