Numerical Modeling of Reconnection-Generated Transients in the Solar Corona

日冕中重新连接产生的瞬变的数值模拟

• 批准号: 2147399
• 负责人: Benjamin Lynch
• 金额: $ 62.09万
• 依托单位: University of California-Berkeley
• 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: 2022-03-15 至 2025-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2147399&HistoricalAwards=false
• 关键词: Numerical; Modeling; Reconnection; Generated; Transients

The origin and evolution of the solar wind and the initiation of eruptive solar flares and their resulting coronal mass ejections (CMEs) are fundamental building blocks of the solar–heliospheric connection and crucial for space weather forecasting. This work will advance discovery while promoting teaching, training, and learning and will enhance the infrastructure for research and education through networks and partnerships. The project will support a postdoctoral fellow and facilitate summer research projects for undergraduate students. Results from the project will be disseminated broadly as the PI, postdoctoral scholar, and undergraduate students will present their results at national and international scientific meetings (e.g. the NSF SHINE Workshop), in colloquia and seminars, and in peer-reviewed journals. One of the key results from the last decade of in-situ observations of interplanetary magnetic flux ropes at 1 AU is that the size distribution of large-scale CME flux ropes and the ubiquitous small-scale flux ropes in the slow solar wind apparently show two distinct populations while remote sensing observations indicate tremendous variation of coronal conditions during their formation. This work is a comprehensive, multidisciplinary investigation into the multi-scale nature of solar eruptive structures. The main Science Objectives are to determine: (1.) How solar and heliospheric magnetic flux rope properties vary over their range of their spatial and energy scales and how the local and global topologies of coronal source regions influence the reconnection formation mechanism(s) of eruptive transients and their resulting magnetic structure; (2.) The fundamental similarities and differences between streamer blob flux ropes, flare reconnection plasmoids, flux rope and quasi-flux rope eruptions from pseudostreamers, and classic, large-scale CMEs from streamer blowouts and stronger-field active regions; (3.) How each of these populations of flux rope transients interact with their overlying/adjacent flux systems, the open-closed field boundaries, and the ambient solar wind outflow. Each of the Science Objectives will be addressed with a combination of state-of-the-art, high-performance numerical modeling along with detailed analysis of multi-spacecraft remote sensing and in-situ observations.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.

太阳风的起源和演变以及爆发性太阳耀斑的开始及其导致的日冕物质抛射是太阳-日光层联系的基本组成部分，对空间天气预报至关重要。这项工作将推动发现，同时促进教学，培训和学习，并将通过网络和伙伴关系加强研究和教育的基础设施。该项目将支持博士后研究员，并促进本科生的夏季研究项目。该项目的结果将广泛传播，因为PI，博士后学者和本科生将在国家和国际科学会议（例如NSF SHINE研讨会），座谈会和研讨会以及同行评审期刊上展示他们的结果。过去十年对1 Au的行星际磁通绳进行的现场观测的关键结果之一是，大尺度CME磁通绳和在慢太阳风中无处不在的小尺度磁通绳的尺寸分布明显地显示出两种不同的种群，而遥感观测表明日冕条件在其形成期间发生了巨大的变化。这项工作是对太阳喷发结构的多尺度性质进行的全面的、多学科的调查。主要的科学目标是确定：（1）。太阳和日光层磁通量绳的性质如何在其空间和能量尺度范围内变化，以及日冕源区的局部和全球拓扑结构如何影响爆发瞬变的重联形成机制及其产生的磁结构;（2）流光blob通量绳，耀斑重联等离子体团，通量绳和准通量绳爆发从伪流光，和经典的，大规模的CME从流光井喷和强场活动区之间的基本相似性和差异;（3）。这些人口的通量绳瞬变如何与他们的覆盖/相邻的通量系统，开闭场边界，以及周围的太阳风外流相互作用。每个科学目标都将结合最先进的高性能数值模拟沿着多航天器遥感和现场观测的详细分析来解决。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知识价值和更广泛的影响审查标准进行评估来支持。

项目成果

CME Evolution in the Structured Heliosphere and Effects at Earth and Mars During Solar Minimum

• DOI: 10.1029/2022sw003215
• 发表时间: 2022-09
• 期刊: Space Weather
• 作者: E. Palmerio;Christina O. Lee;Ian G. Richardson;T. Nieves-chinchilla;Luiz F. G. Dos Santos;J. Gruesbeck;Nariaki V. Nitta;M. L. Mays;J. Halekas;C. Zeitlin;Shaosui Xu;M. Holmström;Y. Futaana;T. Mulligan;B. Lynch;J. Luhmann

Toward Improved Understanding of Magnetic Fields Participating in Solar Flares: Statistical Analysis of Magnetic Fields within Flare Ribbons

• DOI: 10.3847/1538-4357/ac3af3
• 发表时间: 2021-11
• 期刊: The Astrophysical Journal
• 作者: M. Kazachenko;B. Lynch;A. Savcheva;Xudong Sun;B. Welsch

Redefining flux ropes in heliophysics

• DOI: 10.3389/fspas.2023.1114838
• 发表时间: 2023-03
• 作者: T. Nieves-chinchilla;Sanchita Pal;T. Salman;F. Carcaboso;S. Guidoni;H. Cremades;Ayris Narock

On the importance of investigating CME complexity evolution during interplanetary propagation

• DOI: 10.3389/fspas.2022.1064175
• 发表时间: 2022-12
• 作者: R. Winslow;C. Scolini;L. Jian;T. Nieves-chinchilla;M. Temmer;F. Carcaboso;B. Schmieder;S. Poedts;B. Lynch;B. Wood;E. Palmerio;N. Lugaz;C. Farrugia;Christina O. Lee;E. Davies;F. Regnault;T. Salman;T. Török;N. Al-Haddad;A. Vourlidas;W. Manchester;M. Jin;B. Lavraud;A. Galvin

On the utility of flux rope models for CME magnetic structure below 30 R⊙

磁力绳模型在30 R以下CME磁结构中的应用

• DOI: 10.1016/j.asr.2022.05.004
• 发表时间: 2022
• 期刊: Advances in Space Research
• 影响因子: 2.6
• 作者: Lynch, Benjamin J.;Al-Haddad, Nada;Yu, Wenyuan;Palmerio, Erika;Lugaz, Noé
• 通讯作者: Lugaz, Noé