SHINE: Studies of the Heliospheric Magnetic Field and Slow Solar Wind

SHINE：日光层磁场和慢太阳风的研究

• 批准号: 0962645
• 负责人: Nancy Crooker
• 金额: $ 24.53万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-03-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0962645&HistoricalAwards=false
• 关键词: SHINE; Studies; Heliospheric; Magnetic; Field

The Principal Investigator (PI) plans to investigate the origin of the slow solar wind and the magnetic flux budget as the Sun reverses its field in the course of the 11-year sunspot cycle. Using a blend of data analysis and modeling, the PI's investigation will focus on the boundary between the slow and fast solar wind. The PI will test predictions of a widely published model of magnetic footpoint circulation on the Sun, where slow solar wind arises from the release of plasma on closed loops. This project will also use measurements taken during the current unusual minimum of solar activity to test the idea that open magnetic flux is conserved throughout the course of the solar cycle. Finally, the PI will determine to what degree the slow solar wind arises from regions on the Sun that are not associated with the coronal streamer belt and its extension into space as the heliospheric current sheet. This research addresses problems central to the interdisciplinary fields of solar and heliospheric physics. The results will be significant because they will test various existing hypotheses that have important consequences for our understanding of the evolution of the heliospheric magnetic field and the source of the slow solar wind. The proposed set of tasks will also advance our basic understanding of the space weather domain, in which better space weather predictions will benefit society. The PI will mentor students and promote a web-based program of scientific exchange. These research objectives will be aided by using global model predictions obtained from the Community Coordinated Modeling Center at NASA Goddard Space Flight Center.

首席调查员(PI)计划调查缓慢的太阳风的起源，以及太阳在11年太阳黑子周期中逆转其场时的磁通量收支。利用数据分析和建模的混合，PI的调查将集中在慢速太阳风和快太阳风之间的边界。PI将测试一个广泛发表的太阳磁脚点环流模型的预测，在该模型中，缓慢的太阳风是由闭合环路上释放的等离子体产生的。该项目还将使用在当前太阳活动异常最小期间进行的测量来测试开放磁通量在整个太阳周期过程中是守恒的这一想法。最后，PI将确定缓慢的太阳风在多大程度上来自太阳上与日冕流光带及其作为日球层电流片延伸到太空的区域无关的区域。这项研究解决了太阳和日球层物理跨学科领域的核心问题。这一结果将具有重大意义，因为它们将检验各种现有的假设，这些假设对我们理解日球层磁场的演变和慢速太阳风的来源具有重要影响。拟议的一系列任务还将增进我们对空间气象领域的基本理解，在这一领域，更好的空间天气预报将造福社会。国际学生联合会将指导学生并促进基于网络的科学交流计划。这些研究目标将通过使用从NASA戈达德太空飞行中心的社区协调建模中心获得的全球模型预测来帮助实现。