SHINE: Accelerating the Turbulent Solar Wind: One Flux Tube at a Time

SHINE：加速湍流太阳风：一次一根通量管

• 批准号: 1540094
• 负责人: Steven Cranmer
• 金额: $ 19.33万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-12-15 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1540094&HistoricalAwards=false
• 关键词: SHINE; Accelerating; Turbulent; Solar; Wind

This three-year SHINE project aims to improve physical understanding of the origin of the turbulent solar wind. The hot, ionized outer atmosphere of the Sun is a unique laboratory for the study of magnetohydrodynamics (MHD) and plasma physics, with ranges of parameters that are inaccessible on the Earth. However, even after many years of investigation, the basic processes responsible for heating the million-degree solar corona and accelerating the solar wind are still not known. One primary reason for this lack of understanding is that the Sun's magnetic field is so topologically complex, with spatial and temporal scales that vary over many orders of magnitude. New observations are revealing heretofore unavailable details, so the related theoretical models must similarly improve in order to have any hope of providing deeper understanding of the physics. This project will use novel combinations of observations and theoretical models to put firm constraints on the connectivity between the rapidly evolving magnetic flux tubes in the solar corona and various types of MHD fluctuations that propagate through them into the heliosphere and dissipate to heat the plasma. The results of this research project will be published in widely available journals and presented at scientific conferences. In addition, the PI will continue developing software tools and databases to encourage and enable others in the solar-heliospheric community to make practical use of these research results. The research agenda of this project supports the Strategic Goals of the AGS Division in discovery, learning, diversity, and interdisciplinary research.

这个为期三年的SHARE项目旨在提高人们对湍急的太阳风起源的物理理解。太阳热的、电离的外层大气是研究磁流体动力学(MHD)和等离子体物理的独特实验室，其参数范围在地球上是无法获得的。然而，即使经过多年的研究，负责加热百万度太阳日冕和加速太阳风的基本过程仍然未知。缺乏了解的一个主要原因是太阳的磁场在拓扑上是如此复杂，其空间和时间尺度在许多数量级上都不同。新的观测揭示了迄今为止无法获得的细节，因此相关的理论模型必须同样得到改进，才有希望提供对物理学的更深层次的理解。该项目将使用新的观测和理论模型的组合，对日冕中快速演变的磁通量管和通过它们传播到日光层并消散以加热等离子体的各种MHD波动之间的连通性施加严格的限制。这一研究项目的成果将发表在广泛可获得的期刊上，并在科学会议上发表。此外，国际和平研究所将继续开发软件工具和数据库，以鼓励和使太阳-日球界的其他人能够实际利用这些研究成果。该项目的研究议程支持AGS司在发现、学习、多样性和跨学科研究方面的战略目标。