Advancing Understanding of Solar Flares With Microwave Imaging Spectroscopy

利用微波成像光谱增进对太阳耀斑的了解

• 批准号: 2121632
• 负责人: Gregory Fleishman
• 金额: $ 56.49万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard 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=2121632&HistoricalAwards=false
• 关键词: Advancing; Understanding; Solar; Flares; Microwave

Solar flares are the largest explosions in the solar system that release huge amounts of energy. Flares are observed as transient brightenings throughout the electromagnetic spectrum, lasting from a few seconds to hours. The way that this energy release occurs is poorly understood. This project will utilize 3D solar flare modeling and new observational data from the Expanded Owens Valley Solar Array (EOVSA) to better understand how magnetic reconnection leads to the release of magnetic energy and particle acceleration from solar flares. Software tools will be developed and upgraded and used to teach high school interns about solar physics and for graduate physics courses.The project capitalizes on the unique ability of EOVSA to quantify evolution of solar flares by dynamically measuring coronal magnetic fields along with the thermal and nonthermal electron distributions with high spatial and temporal resolution. The following fundamental science goals will be addressed: (i) to understand and quantify the dynamics of solar flares of varying types, with an emphasis on the 3D spatial distribution and evolution of the coronal magnetic field and nonthermal particles; (ii) to obtain new fundamental knowledge on universal physical processes occurring on the Sun such as magnetic reconnection, particle acceleration and transport, and plasma heating. The team will provide open access to the research products to scientists and the public. The work utilizes new microwave imaging data from the EOVSA, data from other ground-based instruments, and data from the latest space missions, coupled with advanced modeling and forward-fitting, to obtain the three-dimensional magnetic field and particle distributions in flaring loops.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.

太阳耀斑是太阳系中最大的爆炸，释放出巨大的能量。耀斑在整个电磁波谱中被观测为短暂的增亮，持续时间从几秒钟到几小时。人们对这种能量释放的方式知之甚少。该项目将利用3D太阳耀斑建模和来自扩展欧文斯谷太阳能阵列（EOVSA）的新观测数据，以更好地了解磁重联如何导致太阳耀斑释放磁能和粒子加速。将开发和更新软件工具，用于向高中实习生讲授太阳物理学和研究生物理课程，该项目利用EOVSA的独特能力，通过动态测量日冕磁场沿着高空间和时间分辨率的热电子和非热电子分布，量化太阳耀斑的演变。将探讨以下基本科学目标：（一）了解各种太阳耀斑的动态并将其量化，重点是日冕磁场和非热粒子的三维空间分布和演变;（二）获得关于太阳上发生的普遍物理过程的新的基本知识，如磁重联、粒子加速和传输以及等离子体加热。该团队将向科学家和公众开放研究产品。这项工作利用了来自EOVSA的新的微波成像数据，来自其他地面仪器的数据，以及来自最新太空任务的数据，再加上先进的建模和前向拟合，为了获得这三个-该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持的搜索.

项目成果

Ultimate Fast Gyrosynchrotron Codes

终极快速陀螺同步加速器代码

• DOI: 10.3847/1538-4357/ac29c0
• 发表时间: 2021
• 期刊: The Astrophysical Journal
• 作者: Kuznetsov, Alexey A.;Fleishman, Gregory D.
• 通讯作者: Fleishman, Gregory D.

What aspects of solar flares can be clarified with mm/submm observations?

• DOI: 10.3389/fspas.2022.966444
• 发表时间: 2022-09
• 期刊: IEEE Transactions on Antennas and Propagation
• 影响因子: 5.7
• 作者: G. Fleishman;J. M. Martínez Oliveros;E. Landi;L. Glesener

Prospects and challenges of numerical modeling of the Sun at millimeter wavelengths

• DOI: 10.3389/fspas.2022.967878
• 发表时间: 2022-11
• 作者: S. Wedemeyer;G. Fleishman;J. de la Cruz Rodríguez;S. Gunár;J. M. da Silva Santos;P. Antolin;J. C. Guevara Gómez;M. Szydlarski;H. Eklund

Magnetic Field Re-configuration Associated With a Slow Rise Eruptive X1.2 Flare in NOAA Active Region 11944

• DOI: 10.3389/fspas.2022.816523
• 发表时间: 2022-04
• 作者: V. Yurchyshyn;Xu Yang;G. Nita;G. Fleishman;V. Abramenko;S. Inoue;E. Lim;W. Cao

KW-Sun: The Konus-Wind Solar Flare Database in Hard X-Ray and Soft Gamma-Ray Ranges

KW-Sun：硬 X 射线和软伽马射线范围内的 Konus-Wind 太阳耀斑数据库

• DOI: 10.3847/1538-4365/ac8b87
• 发表时间: 2022
• 期刊: The Astrophysical Journal Supplement Series
• 作者: Lysenko, A. L.;Ulanov, M. V.;Kuznetsov, A. A.;Fleishman, G. D.;Frederiks, D. D.;Kashapova, L. K.;Sokolova, Z. Ya.;Svinkin, D. S.;Tsvetkova, A. E.
• 通讯作者: Tsvetkova, A. E.