SHINE: The Non-Ideal Evolution of Coronal Mass Ejections: Numerical Studies

SHINE：日冕物质抛射的非理想演化：数值研究

• 批准号: 1153989
• 负责人: Noe Lugaz
• 金额: $ 25.21万
• 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: 2012
• 资助国家: 美国
• 起止时间: 2012-03-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1153989&HistoricalAwards=false
• 关键词: SHINE; Non; Ideal; Evolution; Coronal

The Principal Investigator (PI) will use the University of Michigan's well-developed Space Weather Modeling Framework (SWMF) to perform self-consistent simulations that will address a number of scientific questions related to the properties of coronal mass ejections (CMEs) in the solar corona. Using existing and improved models of CME evolution, the interplanetary magnetic field, and the solar wind, the PI's team will compute directly observable quantities from their simulations. These quantities will then be compared with remote-sensing observations from both spacecraft and ground-based instruments, as well as with available in situ data from various spacecraft. The PI's team will determine the effect of the background magnetic field and reconnection events on CME rotation; how CMEs are deflected in the corona; how such deflections are affected by the presence of coronal holes and streamers; how the location of the CME source region with respect to the heliospheric current sheet might modify this deflection; what causes CME expansion and non-radial propagation to eventually cease; and what parameters determine the distance at which CME evolution becomes "ideal" and why this distance varies from CME to CME.This research has the potential to improve our understanding of the basic physics of the inner heliosphere and outer corona, which in turn will enable improved space weather forecasts through better predictions of CME orientation, propagation direction, and spatial extent. The research team will disseminate their results to the heliophysics community by publication of scientific articles, as well as by participating in, and by organizing, topical workshops and conferences. The PI is a young research scientist who will involve undergraduate students in this work and who pledges to select, whenever possible, under-represented minority students. The PI will engage in public outreach through the "Hawaii Center for Advancing Systemic Heliophysics Education," taking special advantage of colorful graphics and movies produced his SWMF simulations. The project team consists of scientists from the University of New Hampshire, the Naval Research Laboratory, and the Institute for Astronomy at the University of Hawaii, thereby enhancing university partnerships as well as academic collaboration with a federal laboratory.

首席研究员（PI）将使用密歇根大学发达的太空天气建模框架（SWMF）进行自洽的模拟，这些模拟将解决与Solar Corona中冠状质量弹出（CMES）的多种科学问题。使用现有和改进的CME进化模型，星际磁场和太阳风，PI的团队将通过模拟来计算可直接可观察到的数量。然后，将将这些数量与来自航天器和地面仪器的遥感观测值以及各种航天器的原位数据进行比较。 PI的团队将确定背景磁场和重新连接事件对CME旋转的影响； CME如何在电晕中偏转；这种挠度如何受冠状孔和彩带的存在影响； CME源区域相对于Heliosperric电流表的位置如何改变此挠度；导致CME扩展和非偏种传播最终停止的原因； and what parameters determine the distance at which CME evolution becomes "ideal" and why this distance varies from CME to CME.This research has the potential to improve our understanding of the basic physics of the inner heliosphere and outer corona, which in turn will enable improved space weather forecasts through better predictions of CME orientation, propagation direction, and spatial extent.研究团队将通过出版科学文章，以及组织，主题研讨会和会议来将其结果传播给Heliophysics社区。 PI是一位年轻的研究科学家，他将与本科生参与这项工作，并承诺在可能的情况下选择不足的少数族裔学生。 PI将通过“夏威夷进步的系统性热物理学教育中心”进行公共宣传，以特殊优势对五颜六色的图形和电影产生了SWMF模拟。项目团队由新罕布什尔大学，海军研究实验室和夏威夷大学天文学研究所的科学家组成，从而增强了大学合作伙伴关系以及与联邦实验室的学术合作。