Collaborative Research: SHINE: Investigation of Mini-filament Eruptions and Their Relationship with Small Scale Magnetic Flux Ropes in Solar Wind

合作研究：SHINE：研究太阳风中的微型细丝喷发及其与小规模磁通量绳的关系

• 批准号: 2229065
• 负责人: Yu Chen
• 金额: $ 15.63万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2229065&HistoricalAwards=false
• 关键词: Collaborative; Research; SHINE; Investigation; Mini

It is well known that magnetic flux ropes (MFRs) exist ubiquitously in the solar surface and in the interplanetary space. MFRs are generally defined as a bundle of magnetic fields that are twisted about each other and wrap around a common axis. The large scale MFRs are often associated with solar filament eruptions, subsequent propagation of Coronal Mass Ejections (CMEs) in solar wind, and furthermore, the Interplanetary CMEs (ICMs) towards Earth. In recent years, small-scale MFRs (SMFRs) in both solar surface and solar wind are receiving significant attention. Initial evidences show that they are numerous and ubiquitous from high resolution observations from the NSF-funded 1.6m Goode Solar Telescope (GST) of Big Bear Solar Observatory (BBSO) and from NASA’s Parker Solar Probe (PSP). This project addresses the Solar, Heliospheric, and Interplanetary Environment (SHINE) goal of linking the generation and propagation of SMFRs from the solar surface to the solar wind. Two female early career researchers will be supported, as well as undergraduate, graduate, and high school students. The team will mentor students at the NSF REU sites of New Jersey Institute of Technology (NJIT) and the University of Alabama Huntsville (UAH).Using high-resolution, high-polarimetric and spectroscopic data from GST, in-situ observations from PSP as well as other ground-based and space observations, NJIT and UAH join an effort to carry out comprehensive case and statistical studies of SMFRs in solar surface and solar wind. The team will investigate the kinematic, thermal and magnetic properties of them, as well as possible photospheric magnetic field evolution associated with eruption of mini-filaments. In addition, they will find the connection between solar mini-filament eruptions and detected SMFRs in solar wind. The project uses data from NSF funded ground-based observations of BBSO. Combining the most advanced data from GST/BBSO and PSP, the team will disclose detailed properties of SMFRs and address the following key science questions. (1) What are the dynamic properties of mini-filament eruptions (velocity, temperature, density, energy)? (2) What is the photospheric magnetic structure and evolution associated with mini-filament eruptions? (3) What are the statistical distributions of mini-filament eruption in coronal holes and regular quiet sun? (4) Statistically, is there a possible connection between mini-filament eruptions and the SMFRs in the solar wind? These questions are of importance from two aspects: (1) to disclose the basic plasma properties of SMFRs and (2) to advance understanding of the formation of transients in the solar wind.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.

众所周知，磁通绳（MFR）普遍存在于太阳表面和行星际空间中，磁通绳通常被定义为一束相互缠绕并缠绕在公共轴上的磁场。通常与太阳灯丝喷发、太阳风中日冕物质抛射 (CME) 的后续传播以及向地球传播的行星际 CME (ICM) 相关。近年来，太阳表面和太阳风中的小尺度 MFR (SMFR) 受到了极大的关注，美国国家科学基金会 (NSF) 资助的 Big 1.6 m 古德太阳望远镜 (GST) 的高分辨率观测初步证据表明，它们数量众多且普遍存在。 Bear 太阳观测站 (BBSO) 和 NASA 帕克太阳探测器 (PSP) 该项目致力于实现太阳、日光层和行星际环境 (SHINE) 连接发电的目标。以及 SMFR 从太阳表面传播到太阳风的研究将得到支持，该团队还将为新泽西理工学院 NSF REU 站点的学生提供支持。 (NJIT) 和阿拉巴马大学亨茨维尔分校 (UAH)。利用 GS​​T 的高分辨率、高偏振和光谱数据、PSP 的现场观测以及其他地面和空间观测，NJIT 和UAH 致力于对太阳表面和太阳风中的 SMFR 进行全面的案例和统计研究，该团队将研究它们的运动学、热学和磁学特性，以及与微型细丝喷发相关的可能的光球磁场演化。此外，他们还将发现太阳微丝喷发与太阳风中检测到的 SMFR 之间的联系，该项目使用 NSF 资助的 BBSO 地面观测数据，结合 GST/BBSO 的最先进数据。和PSP，该团队将披露SMFR的详细特性并解决以下关键科学问题（1）微型丝状喷发的动态特性（速度、温度、密度、能量）是什么？（2）什么是光球磁力。 (3) 日冕洞和常规安静太阳中的迷你丝状喷发的统计分布是什么？ (4) 从统计上看，它们之间是否存在可能的联系？这些问题从两个方面来说很重要：（1）揭示SMFR的基本等离子体特性；（2）促进对太阳风中瞬变形成的理解。授予 NSF 的法定使命，并通过评估反映使用基金会的智力优点和更广泛的影响审查标准，被认为值得支持。

项目成果

Small-scale Magnetic Flux Ropes in Stream Interaction Regions from Parker Solar Probe and Wind Spacecraft Observations

帕克太阳探测器和风能航天器观测中流相互作用区域的小尺度磁通绳

• DOI: 10.3847/1538-4357/aca894
• 发表时间: 2023-01-01
• 期刊: The Astrophysical Journal
• 作者: Yu Chen;Q. Hu;R. Allen;L. Jian
• 通讯作者: L. Jian