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

该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）从其在日冕中的诞生，通过与周围太阳风的相互作用，一直到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）和“LFM Helio”（LFM Helio），前者模拟太阳日冕的半径约为30个太阳半径，后者是最初为磁层模拟而开发的LFM代码的改编，它将跟随传播到1个天文单位。具体需要完成的任务包括：1)稳态MAS/LFM-helio耦合，获得日冕和内日球层在CME开始前的环境太阳风配置；2)时间相关耦合允许CME结构通过位于&amp；#8764的日冕和内日球层域之间的界面无缝传播；30再保险;3)通过日冕-内日球层模拟、日冕抛射与环境太阳风相互作用的研究以及日冕抛射与日球层成像的比较，验证了日冕-内日球层耦合模型。如果大型日冕物质抛射袭击地球，可能会对从GPS卫星到地面电网的所有东西造成重大影响。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中最重要的方面。该项目将培养一名女博士生。

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.