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

这项提案寻求资金，用于开发和验证一个新的复杂的数值模型，该模型将跟踪日冕物质抛射（CME），从它们在日冕中诞生，通过与环境太阳风的相互作用，并达到1 Au。 完成的模型将结合联合收割机两个已建立的，公认的代码，“MAS”（MHD Around a Sphere），以模拟太阳日冕约30个太阳半径和“LFM Helio”，一个适应的LFM代码最初开发的磁层模拟，将遵循传播到1 Au。 具体任务包括：1）稳态MAS/LFM-日球耦合，以获得CME启动前整个日冕和内日球层的环境太阳风结构; 2）与时间相关的耦合，允许CME结构通过位于#8764; 30 RE的日冕和内日球层区域之间的界面无缝传播&; 3）通过进行日冕-内日球层模拟，研究日冕物质抛射与环境太阳风的相互作用以及日冕物质抛射与环境太阳风的相互作用，如果一个主要的CME撞击地球，它可能会对从GPS卫星到地面电力的一切产生重大影响。网格因此，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。 一名女博士生将在该项目下接受培训。

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.