SHINE: Understanding the Impact of Non-MHD Effects on the Coronal Mass Ejection Dynamics in the Inner Heliosphere

该小组将研究非磁流体动力学（non-MHD）对日冕物质抛射（CME）动力学和内日球层冲击的影响，特别是对日冕物质抛射加速剖面、冲击强度和几何形状的影响。首席研究员（PI）还计划使用由她在密歇根大学的合作者开发的全球MHD代码，研究磁重联在CME的启动和发射及其随后在日球层中的传播中的作用。全球日球层模拟通常包括数值耗散和异常电阻率方面的非理想过程。为了弥合小规模动力学建模和全球模拟之间的差距，该团队将使用模拟代码和密歇根大学开发的“空间天气建模框架”来量化大规模全球磁层动力学和磁重联点附近扩散区域微物理过程之间的相互作用。该代码将采用一种新的机制来控制重连点附近的耗散，根据对磁感应方程的非陀螺修正。这种非回旋效应已被证明显著改变了地球磁层的全球演化，将它们纳入日球层MHD模拟是一种非常有前途的新方法。PI在指导女学生和博士后方面非常活跃。该团队通过包括几名女性研究人员来增强太阳物理学界的多样性，她们将成为对物理科学和工程感兴趣的年轻女性的榜样。该研究项目将包括乔治梅森大学的一名女博士生的培训和参与，以及与美国宇航局戈达德太空飞行中心社区协调建模中心的一名女科学家的合作。这项研究与空间天气预报直接相关，因为它将增强目前广泛使用的空间天气模拟框架的能力。

The team will investigate the impact of non-magnetohydrodynamic (non-MHD) effects on the dynamics of coronal mass ejections (CMEs) and shocks in the inner heliosphere, and in particular, on the CME acceleration profile, shock strength, and geometry. The Principal Investigator (PI) also plans to study the role of magnetic reconnection in the initiation and liftoff of a CME and its subsequent propagation in the heliosphere, using a global MHD code developed by her collaborators at the University of Michigan. Global heliospheric simulations usually include non-ideal processes in terms of numerical dissipation and anomalous resistivity. To bridge the gap between small-scale kinetic modeling and global simulations, this team will use a simulation code and "Space Weather Modeling Framework" developed at the University of Michigan to quantify the interaction between large-scale global magnetospheric dynamics and microphysical processes in diffusion regions near magnetic reconnection sites. This code will incorporate a new mechanism for controlling dissipation in the vicinity of reconnection sites, in terms of non-gyrotropic corrections to the magnetic induction equation. Such non-gyrotropic effects have been demonstrated to significantly alter the global evolution of the Earth's magnetosphere, and their inclusion in heliospheric MHD simulations is a very promising new approach. The PI is very active in mentoring female students and postdocs. The team enhances diversity in the solar physics community by including several female researchers who will be role models for young women interested in the physical sciences and engineering. This research program will include the training and participation of a female PhD student at George Mason University, as well as a collaboration with a female scientist at the Community Coordinated Modeling Center at NASA Goddard Space Flight Center. This study is directly relevant to space weather forecasting, since it will enhance the capabilities of the Space Weather Modeling Framework now in wide community use.