Collaborative Research: Numerical Investigation of CME-CME Interaction and Associated Effects from the Low Corona to 1 AU

这组研究人员将使用三维磁流体动力学模拟来研究先前的太阳爆发和等离子体相互作用过程对到达地球轨道的日冕物质抛射（cme）最终特性的影响。研究小组将评估早期日冕物质抛射是如何影响日球层和太阳风的，以及之前的日冕物质抛射相互作用是如何偏转、旋转、压缩和加速随后的日冕物质抛射的。该小组将确定地球上复杂日冕物质抛射事件中增强地球有效性的原因，以及这些原因可以从遥感观测中预测到的程度。该团队将使用现有的和改进的CME演化、行星际磁场和太阳风模型，对选定的CME事件进行自一致的模拟，然后将模型输出与航天器观测结果进行比较。研究人员认为，这些直接的比较将对他们的数值模型产生更好的约束，以及更好地理解这些复杂测量的新工具。该团队是由夏威夷大学（牵头机构）、新罕布什尔大学和海军研究实验室共同努力的结果。小组成员将通过组织和参加研讨会和会议，以及通过他们的期刊出版物和在美国宇航局戈达德太空飞行中心的社区协调建模中心改进现有的社区模型，向空间天气界广泛传播他们的研究成果。夏威夷大学和新罕布什尔大学的研究人员将把当地的本科生纳入这项研究。调查人员承诺尽可能招募代表性不足的少数民族参与这项工作。首席研究员还计划利用夏威夷推进系统太阳物理学教育中心进行公众宣传，同时利用来自这些研究模拟的彩色图形和电影。

This team of investigators will use three-dimensional magnetohyrodynamic simulations to study the impact of prior solar eruptions and plasma interaction processes on the ultimate properties of coronal mass ejections (CMEs) reaching Earth's orbit. The team will assess how earlier CMEs precondition the heliosphere and solar wind, as well as how prior CME interactions deflect, rotate, compress, and accelerate subsequent CMEs. The team will identify the causes of enhanced geo-effectiveness in complex CME events at Earth and the extent to which these causes can be forecasted from remote-sensing observations. The team will conduct self-consistent simulations of selected CME events using existing and improved models of CME evolution, the interplanetary magnetic field, and the solar wind, and they will then compare their model output to spacecraft observations. The investigators argue that these direct comparisons will result in better constraints on their numerical models, as well as in new tools to better understand these complex measurements.The team is a collaborative effort among the University of Hawaii (the lead institution), the University of New Hampshire, and the Naval Research Laboratory. The team members will broadly disseminate their research results to the space weather community by organizing and participating in workshops and conferences, as well as through their journal publications and the enhancement of existing community models at the Community Coordinated Modeling Center at NASA Goddard Space Flight Center. The invesitgators at the University of Hawaii and the University of New Hampshire will integrate local undergraduates in this research. The investigators pledge to recruit under-represented minorities into this effort wherever possible. The lead investigator also plans to take advantage of the Hawaii Center for Advancing Systemic Heliophysics Education for engaging in public outreach, while exploiting the colorful graphics and movies derived from these research simulations.