The Connectivity of the Solar Magnetic Field: Its Complexity and Its Consequences

太阳磁场的连通性：其复杂性及其后果

• 批准号: 0416340
• 负责人: Dana Longcope
• 金额: $ 29.47万
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2007-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0416340&HistoricalAwards=false
• 关键词: Connectivity; Solar; Magnetic; Field; Its

This is a proposal to use the powerful Minimum Current Corona model, developed under prior NSF funding, to study the coupling between different magnetic regimes in the Sun.The Minimum Current Corona is a self-consistent, nonlinear model for the quasi-static evolution of complex three-dimensional coronal magnetic fields. It provides a rigorous lower bound on the magnetic energy stored as the photospheric magnetic field slowly evolves -- energy that can be liberated by topological reconnection, giving rise to flares or general coronal heating. It is a tool ideally suited to modeling the effects of coupling magnetic fields from two distinct spatial regions, such as the Sun's corona and convection zone. It also offers an unparalleled means of quantifying the effects of small-scale current sheets on the large-scale fields and vice versa. The research proposed here will consist of inter-related investigations aimed at understanding the couplings between regions and between scales. A prime objective of this research is to develop and refine powerful tools for analyzing energetics in complex three-dimensional magnetic fields. The broader impacts of the research will come from facilitating its use by the community at large. At present at least three other research groups are using the model and software developed under previous funding. The results of the proposed investigations will be disseminated first by publication in peer-reviewed journals. In addition, a review article is being prepared to provide a single, concise reference describing the analysis of coronal connectivity. Finally, a suite of software tools that implement all of the models will be made publicly available. This distribution will include a reference manual, and several benchmark cases to serve as tutorials or as touch-points with alternative tools. Graduate and undergraduate students will participate in the research.

这是一项利用在美国国家科学基金会之前资助下开发的强大的最小电流日冕模型来研究太阳不同磁态之间的耦合的提议。最小电流日冕是一个自洽的非线性模型，用于复杂三维日冕磁场的准静态演化。它为光球磁场缓慢演化时存储的磁能提供了严格的下限，这些能量可以通过拓扑重联释放，从而引起耀斑或一般日冕加热。它是一种非常适合模拟来自两个不同空间区域（例如太阳日冕和对流区）的耦合磁场影响的工具。它还提供了一种无与伦比的方法来量化小尺度电流片对大尺度场的影响，反之亦然。这里提出的研究将包括相互关联的调查，旨在了解区域之间和尺度之间的耦合。这项研究的主要目标是开发和完善用于分析复杂三维磁场中能量学的强大工具。这项研究的更广泛影响将来自于促进整个社区的使用。目前至少有其他三个研究小组正在使用先前资助下开发的模型和软件。拟议调查的结果将首先通过在同行评审期刊上发表来传播。此外，正在准备一篇评论文章，以提供描述冠状连接性分析的单一、简洁的参考。最后，一套实现所有模型的软件工具将公开提供。该发行版将包括一本参考手册和几个基准案例，可用作教程或替代工具的接触点。研究生和本科生将参与该研究。