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力学模拟来研究以前的太阳喷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)的最终性质的影响。该团队将评估较早的日冕物质抛射如何为日光层和太阳风提供先决条件，以及之前的日冕物质抛射相互作用如何偏转、旋转、压缩和加速后续的日冕物质抛射。该小组将确定在地球上复杂的CME事件中提高地球有效性的原因，以及这些原因可以从遥感观测中预测的程度。该团队将使用CME演化、行星际磁场和太阳风的现有和改进模型对选定的CME事件进行自洽模拟，然后他们将把模型输出与航天器观测进行比较。研究人员认为，这些直接比较将对他们的数字模型产生更好的约束，并产生新的工具来更好地理解这些复杂的测量。该团队是夏威夷大学(牵头机构)、新汉普郡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讲习班和会议，以及通过他们的期刊出版物和加强美国宇航局戈达德航天飞行中心社区协调建模中心的现有社区模型，向空间气象界广泛传播他们的研究成果。夏威夷大学和新汉普郡大学的投资人将把当地的本科生纳入这项研究。调查人员承诺，只要可能，就会招募代表不足的少数族裔参与这一努力。首席研究人员还计划利用夏威夷推进系统太阳物理学教育中心参与公共宣传，同时利用这些研究模拟产生的五颜六色的图形和电影。

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.