SHINE: The Magnetic Topology of Linked Coronal Mass Ejections (CMEs)

SHINE：关联日冕物质抛射 (CME) 的磁拓扑

• 批准号: 1156119
• 负责人: Viacheslav Titov
• 金额: $ 26.57万
• 依托单位: Predictive Science Incorporated
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1156119&HistoricalAwards=false
• 关键词: SHINE; Magnetic; Topology; Linked; Coronal

The Principal Investigator (PI) will study so-called "multiple" or "sympathetic" coronal mass ejections (CMEs) in order to determine the structural properties of the background solar magnetic field in which these eruptions occur, specifically for two well-observed multiple CME events. He will investigate how structural features like separatrix surfaces and quasi-separatrix layers (QSLs) characterize the sites of magnetic reconnection and field reconfiguration, as well as how they connect individual CME eruptions in multiple events and, in particular, how these features predetermine the sequential order of eruptions. The PI will analyze the evolution of multiple CMEs, using data from ground-based and space-based observatories, along with global potential field source surface (PFSS) and magnetohydrodynamic (MHD) modeling of the coronal magnetic field. Specifically, he will compute global PFSS and MHD solutions that describe the background magnetic configurations of the multiple CME events of 1-2 August 2010 and 27-28 July 2011. He will also reconstruct the large-scale separatrix surfaces and QSLs in these configurations and identify which of their structural components are model-independent. The PI will then analyze these components and identify among them those that are most likely to affect the CME eruption process in these events, and particularly, those which predetermine the order of successive CME eruptions.The PI's new techniques for the structural analysis of magnetic field configurations will be applicable to all studies in solar and heliospheric physics where a detailed knowledge of magnetic field structure and its impact on physical processes in solar plasma is required. The PI will also share his results online with the wider scientific community. This research will result in a fuller description of the basic magnetic topology of the solar corona, and this description is a prerequisite for effectively predicting space weather events like CMEs.

首席研究员（PI）将研究所谓的“多重”或“交感”日冕物质抛射（CME），以确定这些喷发发生的背景太阳磁场的结构特性，特别是两个观察良好的多重CME事件。他将研究分界线表面和准分界线层（QSL）等结构特征如何表征磁场重联和磁场重新配置的位置，以及它们如何在多个事件中连接单个CME爆发，特别是这些特征如何预先确定爆发的顺序。PI将利用地面和空间观测站的数据，沿着全球位场源表面（PFSS）和日冕磁场的磁流体动力学（MHD）建模，分析多个日冕物质抛射的演变。具体来说，他将计算全球PFSS和MHD解决方案，描述了2010年8月1日至2日和2011年7月27日至28日的多个CME事件的背景磁场配置。他还将重建这些配置中的大规模分界线表面和QSL，并确定它们的结构组件中哪些是独立于模型的。然后，PI将分析这些成分，并确定其中最有可能影响这些事件中CME喷发过程的成分，特别是，PI的磁场结构分析新技术将适用于太阳和日光层物理学的所有研究，其中详细了解磁场结构及其对太阳的影响。需要太阳等离子体中的物理过程。PI还将在线与更广泛的科学界分享他的研究结果。这项研究将导致对太阳日冕的基本磁拓扑结构的更全面的描述，这种描述是有效预测CME等空间天气事件的先决条件。