SHINE: Collaborative Research: Time-dependent coupling of the solar corona and inner heliosphere: Interfacing LFM-helio with MAS

SHINE：合作研究：日冕和内日光层的时间依赖性耦合：LFM-helio 与 MAS 的接口

• 批准号: 1260388
• 负责人: Jon Linker
• 金额: $ 10.9万
• 依托单位: Predictive Science Incorporated
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1260388&HistoricalAwards=false
• 关键词: SHINE; Collaborative; Research; Time; dependent

This proposal seeks funding for the development and validation of a new sophisticated numerical model that would follow Coronal Mass Ejections (CMEs) from their birth in the solar corona, through interactions with the ambient solar wind, and out to 1 AU. The finished model will combine two established, well-recognized codes, "MAS" (MHD Around a Sphere) to model the solar corona out to about 30 solar radii and "LFM Helio," an adaptation of the LFM code originally developed for magnetospheric simulations, that would follow the propagation out to 1 AU. Specific tasks to be completed include: 1) Steady-state MAS/LFM-helio coupling to obtain the ambient solar wind configuration throughout the corona and inner heliosphere prior to CME initiation; 2) Time-dependent coupling allowing seamless propagation of the CME structure through the interface between the coronal and inner heliosphere domains located at ∼ 30 RE; 3) Vetting of the resultant coupled model by performing corona-inner heliosphere simulations, investigations of CME interaction with the ambient solar wind and each other, and comparisons with heliospheric imaging.If a major CME was to hit the earth it could have major consequences on everything from GPS satellites to the terrestrial power grid. Hence, understanding how CMEs propagate from the Sun to the Earth is perhaps the most important aspect of space weather forecasting. A female PhD student would be trained under this project.

该提案寻求资金来开发和验证一个新的复杂数值模型，该模型将跟踪日冕物质抛射（CME）从日冕诞生以来，通过与周围太阳风的相互作用，直至 1 个天文单位。 完成的模型将结合两个已建立的、公认的代码：“MAS”（MHD around a Sphere），用于模拟大约 30 个太阳半径的日冕；“LFM Helio”，是最初为磁层模拟开发的 LFM 代码的改编版，这将跟随传播到 1 AU。 需要完成的具体任务包括：1）稳态MAS/LFM-日光耦合，以获得CME启动之前整个日冕和内日光层的环境太阳风配置； 2) 依赖于时间的耦合允许日冕物质抛射结构通过位于∼的日冕域和内日光层域之间的界面无缝传播。 30 重新； 3) 通过执行日冕-内部日光层模拟、研究日冕物质抛射与周围太阳风及其相互之间的相互作用以及与日光层成像的比较来审查由此产生的耦合模型。如果大型日冕物质抛射撞击地球，可能会对地球产生重大影响从 GPS 卫星到地面电网的一切。因此，了解日冕物质抛射如何从太阳传播到地球可能是空间天气预报最重要的方面。 该项目将培训一名女博士生。