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

SHINE：了解非 MHD 效应对内日光层日冕物质抛射动力学的影响

• 批准号: 0962683
• 负责人: Merav Opher
• 金额: --
• 依托单位: George Mason University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-15 至 2011-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0962683&HistoricalAwards=false
• 关键词: SHINE; Understanding; Impact; Non; MHD

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.

该团队将研究非磁流体动力学（非MHD）效应对日冕物质抛射（CME）和内日球层冲击动力学的影响，特别是对CME加速度曲线，冲击强度和几何形状的影响。首席研究员（PI）还计划研究磁重联在CME的启动和升空及其随后在日光层中的传播中的作用，使用她在密歇根大学的合作者开发的全球MHD代码。全球日光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。为了弥补小规模动力学建模和全球模拟之间的差距，该小组将使用模拟代码和密歇根大学开发的“空间气象建模框架”，以量化大规模全球磁层动力学与磁重联点附近扩散区域微物理过程之间的相互作用。这个代码将纳入一个新的机制，用于控制耗散在附近的重联网站，在非回转修正的磁感应方程。这种非回转效应已被证明可以显著改变地球磁层的全球演化，将其纳入日光层MHD模拟是一种非常有前途的新方法。PI非常积极地指导女学生和博士后。该团队通过包括几名女性研究人员来增强太阳物理学社区的多样性，这些女性研究人员将成为对物理科学和工程感兴趣的年轻女性的榜样。这项研究计划将包括培训和参与乔治梅森大学的一名女博士生，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合作。这项研究与空间气象预报直接相关，因为它将增强目前社区广泛使用的空间气象建模框架的能力。