Collaborative Research: SHINE: Where Are Particles Accelerated in Coronal Jets?

合作研究：SHINE：日冕喷流中的粒子在哪里加速？

• 批准号: 2229336
• 负责人: Pankaj Kumar
• 金额: $ 26.53万
• 依托单位: American University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-04-01 至 2026-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2229336&HistoricalAwards=false
• 关键词: Collaborative; Research; SHINE; Where; Particles

Key questions remain regarding the source regions of impulsive solar energetic particles and their escape into the heliosphere. Understanding their origin will help in forecasting space weather and its impacts on spacecraft and instruments. This project addresses the Solar, Heliospheric, and Interplanetary Environment (SHINE) goal to enhance understanding of processes by which energy in the form of magnetic fields and particles are produced by the Sun and accelerated in interplanetary space. Graduate and undergraduate researchers will be supported. Further, a database of solar coronal-jet events will be created.The project is an observational and theoretical study of coronal jets to answer two science questions: (1) Where are electrons accelerated in active-region periphery jets? (2) How do flare-accelerated particles from active-region periphery jets escape into the heliosphere? The approach combines high-quality observations with state-of-the-art numerical simulations. The team will select and analyze a set of coronal jets at active-region peripheries from space-based and ground-based observatories, including the NSF-funded Expanded Owens Valley Solar Array. They will determine which types of jets are associated with impulsive solar energetic particle events, where the high-energy electrons are located both within and beyond the solar sources, and how these events evolve. Their magnetic topologies will be estimated by nonlinear force-free field extrapolations from magnetograms. Based on the data analysis results, they will perform simulations with initial conditions consistent with typical properties of the observed events. Postprocessing the simulation output with the particle-tracking code will reveal where electrons are energized, how their spectra evolve, and how these energetic particle escape.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.

关于脉冲太阳高能粒子的源区及其逃逸到日光层的关键问题仍然存在。了解它们的起源将有助于预测太空天气及其对航天器和仪器的影响。该项目致力于解决太阳、日光层和行星际环境 (SHINE) 的目标，以增强对太阳产生磁场和粒子形式的能量并在行星际空间中加速的过程的理解。研究生和本科生研究人员将得到支持。此外，还将创建一个太阳日冕喷流事件数据库。该项目是对日冕喷流的观测和理论研究，旨在回答两个科学问题：（1）电子在活动区外围喷流中加速的位置在哪里？ (2) 来自活动区外围喷流的耀斑加速粒子如何逃逸到日光层？该方法将高质量的观测与最先进的数值模拟相结合。该团队将从天基和地面观测站选择并分析位于活动区外围的一组日冕喷流，其中包括美国国家科学基金会资助的扩展欧文斯谷太阳能电池阵。他们将确定哪些类型的喷流与脉冲太阳能高能粒子事件相关，高能电子位于太阳源内部和外部的位置，以及这些事件如何演变。它们的磁拓扑将通过磁力图的非线性无力场外推来估计。根据数据分析结果，他们将在与观察到的事件的典型属性一致的初始条件下进行模拟。使用粒子跟踪代码对模拟输出进行后处理将揭示电子在何处被激发、它们的光谱如何演化以及这些高能粒子如何逃逸。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和技术进行评估，被认为值得支持。更广泛的影响审查标准。

项目成果

High-resolution Observations of Plume Footpoints in a Solar Coronal Hole

太阳日冕洞中羽流足点的高分辨率观测

• DOI: 10.3847/1538-4357/acd456
• 发表时间: 2023-08-01
• 期刊: The Astrophysical Journal
• 作者: Kyungsuk Cho;Pankaj Kumar;I. Cho;M. Madjarska;V. Nakariakov;E. Lim;W. Cao;V. Yurchyshyn;Xu Yang;Sung Park
• 通讯作者: Sung Park

Plasmoids, Flows, and Jets during Magnetic Reconnection in a Failed Solar Eruption

失败的太阳喷发中磁重联过程中的等离子体团、流和喷流

• DOI: 10.3847/1538-4357/acaea4
• 发表时间: 2023-02
• 期刊: The Astrophysical Journal
• 作者: Kumar, Pankaj;T. Karpen, Judith;Antiochos, Spiro K.;DeVore, C. Richard;Wyper, Peter F.;Cho, Kyung
• 通讯作者: Cho, Kyung

New Evidence on the Origin of Solar Wind Microstreams/Switchbacks

关于太阳风微流/之字形起源的新证据

• DOI: 10.3847/2041-8213/acd54e
• 发表时间: 2023-07
• 期刊: The Astrophysical Journal Letters
• 作者: Kumar, Pankaj;Karpen, Judith T.;Uritsky, Vadim M.;Deforest, Craig E.;Raouafi, Nour E.;DeVore, C. Richard;Antiochos, Spiro K.
• 通讯作者: Antiochos, Spiro K.

Magnetic Reconnection as the Driver of the Solar Wind

磁重联作为太阳风的驱动力

• DOI: 10.3847/1538-4357/acaf6c
• 发表时间: 2023-03
• 期刊: The Astrophysical Journal
• 作者: Raouafi, Nour E.;Stenborg, G.;Seaton, D. B.;Wang, H.;Wang, J.;DeForest, C. E.;Bale, S. D.;Drake, J. F.;Uritsky, V. M.;Karpen, J. T.;et al
• 通讯作者: et al

Self-similar Outflows at the Source of the Fast Solar Wind: A Smoking Gun of Multiscale Impulsive Reconnection?

快速太阳风源头的自相似流出：多尺度脉冲重联铁证如山？

• DOI: 10.3847/2041-8213/acf85c
• 发表时间: 2023-09-12
• 期刊: The Astrophysical Journal Letters
• 作者: V. Uritsky;J. Karpen;N. Raouafi;Pankaj Kumar;C. R. DeVore;C. Deforest
• 通讯作者: C. Deforest