Collaborative Research: Achieving a New Understanding of Solar Flare Termination Shocks

合作研究：对太阳耀斑终止激波有了新的认识

• 批准号: 2109154
• 负责人: Fan Guo
• 金额: $ 16.65万
• 依托单位: New Mexico Consortium
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2109154&HistoricalAwards=false
• 关键词: Collaborative; Research; Achieving; New; Understanding

A collaborative project between the New Mexico Consortium, New Jersey Institute of Technology, Dartmouth College, and the Smithsonian Institution Astrophysical Observatory is dedicated to the study of solar flares. Solar flares are a priority science area for the 2019 National Space Weather Strategy and Action Plan. When solar flares impact Earth they effect the near-Earth space radiation environment and contribute to satellite drag. Solar flares contain two parts – light and particles. The bright flaring light, the most popularly noted feature of these events, is followed by a stream of extremely fast electrons and ions. These particles can reach earth within an hour of the light emission, making timely prediction of particle events particularly challenging. This project examines one potential mechanism for the acceleration of particles to such high energies. It combines multiple state of the models and data from satellite and ground-based platforms. The research team is comprised of early-career faculty and students from the four collaborating institutions.This project addresses particle acceleration and transport in solar flares. Specifically, it will address magnetic reconnection driven processes in flare termination shocks and their role in electron acceleration and transport, and non-thermal emission. The modeling effort combines large-scale particle-in-cell and magnetohydrodynamic (MHD) simulations in 2.5D and 3D to model realistic magnetic field and plasma evolution along with the energy release, particle acceleration, and transport. Synthetic observations from the combined simulations will be generated to be compared with microwave, E/UV, and X-ray imaging and spectroscopic data from the Expanded Owens Valley Solar Array, the NASA’s Solar Dynamics Observatory, and Hinode.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

新墨西哥州联合会、新泽西理工学院、达特茅斯学院和史密森学会天体物理观测站之间的一个合作项目致力于研究太阳耀斑。太阳耀斑是2019年国家空间天气战略和行动计划的优先科学领域。当太阳耀斑撞击地球时，它们会影响近地空间辐射环境，并造成卫星阻力。太阳耀斑包含两部分-光和粒子。明亮的闪光是这些事件最常见的特征，紧随其后的是一股极快的电子和离子流。这些粒子可以在光发射后一小时内到达地球，这使得及时预测粒子事件特别具有挑战性。该项目研究了粒子加速到如此高能量的一种潜在机制。它结合了模型的多种状态以及来自卫星和地面平台的数据。该研究小组由来自四个合作机构的早期职业教师和学生组成。该项目旨在解决太阳耀斑中的粒子加速和传输问题。具体来说，它将解决磁重联驱动的过程中耀斑终止冲击和它们的作用，电子加速和运输，和非热发射。建模工作结合了2.5D和3D的大规模粒子细胞和磁流体动力学（MHD）模拟，以模拟逼真的磁场和等离子体演化沿着能量释放，粒子加速和运输。综合模拟产生的综合观测结果将与来自扩展欧文斯谷太阳能阵列、美国宇航局太阳动力学观测站和日野的微波、E/UV和X射线成像和光谱数据进行比较。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

项目成果

Particle Acceleration in Magnetic Reconnection with Ad Hoc Pitch-angle Scattering

具有特设俯仰角散射的磁重联中的粒子加速

• DOI: 10.3847/1538-4357/ac7143
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Johnson, Grant;Kilian, Patrick;Guo, Fan;Li, Xiaocan
• 通讯作者: Li, Xiaocan

A Model of Double Coronal Hard X-Ray Sources in Solar Flares

太阳耀斑中双日冕硬X射线源模型

• DOI: 10.3847/1538-4357/ac731b
• 发表时间: 2022-01
• 期刊: The Astrophysical Journal
• 作者: Xiangliang Kong;Jing Ye;Bin Chen;Fan Guo;Chengcai Shen;Xiaocan Li;Sijie Yu;Yao Chen;Joe Giacalone
• 通讯作者: Joe Giacalone

Modeling Electron Acceleration and Transport in the Early Impulsive Phase of the 2017 September 10th Solar Flare

• DOI: 10.3847/1538-4357/ac6efe
• 发表时间: 2022-05
• 期刊: The Astrophysical Journal
• 作者: Xiaocan Li;F. Guo;Bin Chen;Chengcai Shen;L. Glesener

Numerical Modeling of Energetic Electron Acceleration, Transport, and Emission in Solar Flares: Connecting Loop-top and Footpoint Hard X-Ray Sources

太阳耀斑中高能电子加速、传输和发射的数值模拟：连接环顶和足点硬 X 射线源

• DOI: 10.3847/2041-8213/aca65c
• 发表时间: 2022-11
• 期刊: The Astrophysical Journal Letters
• 作者: Xiangliang Kong;Bin Chen;Fan Guo;Chengcai Shen;Xiaocan Li;Jing Ye;Lulu Zhao;Zelong Jiang;Sijie Yu;Yao Chen;Joe Giacalone
• 通讯作者: Joe Giacalone