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; 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.

关于脉冲太阳能颗粒的源区域及其逃逸到地球球的源区域仍然存在关键问题。了解它们的起源将有助于预测太空天气及其对航天器和工具的影响。该项目解决了太阳，地球和星际环境（Shine）的目标，以增强对磁场和颗粒形式形式的过程的理解，并在星际间空间中加速产生磁场和颗粒的形式。将支持研究生和本科研究人员。此外，将创建一个太阳能冠状事件的数据库。该项目是对冠状喷气机的观察性和理论研究，以回答两个科学问题：（1）在活动区域​​外围喷气机中电子在哪里加速电子？ （2）来自活性区周围喷气机的耀斑加速颗粒如何逃脱到地球球中？该方法将高质量的观察结果与最先进的数值模拟相结合。该团队将从空间和基于地面的天文台（包括NSF资助的扩展的Owens Valley Solar Array）中选择并分析一组Active-Arime-Region外围的冠状喷气机。他们将确定哪种类型的喷气机与冲动的太阳能颗粒事件相关，其中高能电子都位于太阳能源内外，以及这些事件的发展方式。它们的磁性拓扑将通过磁图中的非无线场外推估计。基于数据分析结果，他们将执行与观察到事件的典型特性一致的初始条件的模拟。使用粒子跟踪代码在模拟输出后进行后处理，将揭示电子在哪里通电，光谱如何发展以及这些能量粒子如何逃脱。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估来评估通过评估来支持的。