Collaborative Research: SHINE--Magnetic Energy Release During Solar Eruptions - From Large to Small Scales

合作研究：SHINE——太阳喷发期间的磁能释放——从大尺度到小尺度

• 批准号: 1723425
• 负责人: Katharine Reeves
• 金额: $ 21.51万
• 依托单位: Smithsonian Institution Astrophysical Observatory
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1723425&HistoricalAwards=false
• 关键词: Collaborative; Research; SHINE; Magnetic; Energy

This 3-year SHINE project is aimed at gaining a comprehensive understanding of the physical connection between small-scale physical processes at magnetic reconnection sites in the solar atmosphere and the evolution of solar eruptions at greater scales. This, the project has the potential to significantly advance knowledge of the energy release process in solar eruptions. In particular, the project will explore the relationship between small-scale energy release in the form of outflows in the current sheet region and the large-scale transport of thermal energy in the flare structure. The integrated modeling efforts will form the basis of the development of a more sophisticated, full three-dimensional (3-D) simulation of solar eruptions in the future.The 3-year research program integrates two sets of well-developed, state-of-the-art magnetohydrodynamics (MHD) simulations: one simulation models the large-scale structure and evolution of solar flares, whereas the other simulation targets detailed dynamics in and around the reconnection current sheet region at small scales. The large-scale flare simulation will be used to set up the context and initial conditions for the detailed full 3-D simulation of the reconnection region. The outputs of the detailed small scale 3-D simulation, in turn, will provide feedback and update the large-scale simulation to evaluate the consequences of small-scale energy release processes. The modeling results will be compared with extreme ultraviolet (EUV) and X-ray observations to test and improve our understanding of the energy release and conversion processes from small to large scales. A variety of well observed, but poorly understood phenomena that are closely tied to the energy release processes will be investigated and compared to model outputs, including supra-arcade down-flows and other fast plasma outflows, current-sheet like structures above flare loops, and hot loop-top EUV/X-ray sources.The improved knowledge on the origin of solar eruptions is critical to understand basic science needed to meet the goals of the National Space Weather Strategy and Action Plan, which aims to develop tools to forecast space weather and mitigate its impacts. The project team will involve students in this SHINE research through the established CfA's Solar Physics Research Experiences for Undergraduates (REU) program. These students come from a wide variety of backgrounds, including traditionally underrepresented groups in the sciences. Thus, the research and EPO agenda of this project supports the Strategic Goals of the AGS Division in discovery, learning, diversity, and interdisciplinary research.

这个为期三年的“闪耀”项目旨在全面了解太阳大气层磁重联点小规模物理过程与更大规模太阳喷发演变之间的物理联系。 该项目有可能大大提高对太阳爆发能量释放过程的认识。 特别是，该项目将探索电流片区域流出形式的小规模能量释放与耀斑结构中热能大规模传输之间的关系。 综合建模工作将成为未来开发更复杂的全三维（3-D）太阳喷发模拟的基础。这项为期3年的研究计划整合了两套成熟的、最先进的磁流体动力学（MHD）模拟：一种模拟模拟太阳耀斑的大规模结构和演变，而另一种模拟则以小尺度的重联电流片区域内和周围的详细动力学为目标。 大规模耀斑模拟将被用来建立上下文和初始条件的详细的全三维模拟的重联区。 详细的小规模3-D模拟的输出反过来将提供反馈并更新大规模模拟，以评估小规模能量释放过程的后果。 模拟结果将与极紫外（EUV）和X射线观测结果进行比较，以测试和提高我们对从小到大的能量释放和转换过程的理解。 将研究各种与能量释放过程密切相关的观察到的但知之甚少的现象，并将其与模型输出进行比较，包括超拱廊下行流和其他快速等离子体流出，耀斑环上方的电流片状结构，和热环顶EUV/X-对太阳爆发起源的进一步了解对于理解实现国家空间气象战略目标所需的基础科学至关重要该计划旨在开发预测空间天气和减轻其影响的工具。 项目团队将通过CfA的本科生太阳物理研究经验（REU）计划让学生参与这项SHINE研究。 这些学生来自各种各样的背景，包括传统上代表性不足的科学群体。 因此，该项目的研究和EPO议程支持AGS部门在发现、学习、多样性和跨学科研究方面的战略目标。

项目成果

The Dynamical Behavior of Reconnection-driven Termination Shocks in Solar Flares: Magnetohydrodynamic Simulations

太阳耀斑中重新连接驱动的终止激波的动力学行为：磁流体动力学模拟

• DOI: 10.3847/1538-4357/aaeed3
• 发表时间: 2018-12
• 期刊: Astrophysical Journal
• 影响因子: 4.9
• 作者: Shen Chengcai;Kong Xiangliang;Guo Fan;Raymond John C.;Chen Bin
• 通讯作者: Chen Bin

Numerical study of the cascading energy conversion of the reconnection current sheet in solar eruptions

• DOI: 10.1093/mnras/sty2716
• 发表时间: 2017-12
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Jing Ye;Jing Ye;Chengcai Shen;J. Raymond;Jun Lin;U. Ziegler

An efficient parallel semi-implicit solver for anisotropic thermal conduction in the solar corona

• DOI: 10.1016/j.ascom.2019.100341
• 发表时间: 2020-01
• 期刊: Astron. Comput.
• 作者: Jing Ye;Chengcai Shen;Jun Lin;Z. Mei

Reconnection in the Post-impulsive Phase of Solar Flares

• DOI: 10.3847/1538-4357/aabad4
• 发表时间: 2018-04
• 期刊: The Astrophysical Journal
• 作者: T. Forbes;D. Seaton;K. Reeves

The origin of underdense plasma downflows associated with magnetic reconnection in solar flares

• DOI: 10.1038/s41550-021-01570-2
• 发表时间: 2021-11
• 期刊: Nature Astronomy
• 影响因子: 14.1
• 作者: Chengcai Shen;Bin Chen;K. Reeves;Sijie Yu;V. Polito;Xiao-yang Xie