Improving Models to Better Represent the Complex Structure of Coronal Mass Ejections
改进模型以更好地表示日冕物质抛射的复杂结构
基本信息
- 批准号:1954983
- 负责人:
- 金额:$ 38.12万
- 依托单位:
- 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:2021-01-01 至 2024-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This award is to support the investigation of Coronal Mass Ejection (CME) structures. CMEs are eruptions from the sun or storms which release billions of tons of material and strong electromagnetic fields into the solar system. When directed at Earth, they typically take about three days to arrive, however, very powerful storms can arrive in as few as 18 hours. This gives very little lead time in which to prepare for disruptions to satellites and to power grids. CMEs change characteristics as they move through the solar system. Therefore, understanding the structure and how these changes occur is very important for understanding when a CME will arrive at Earth and how it will impact Earth’s magnetic field and our essential assets. This project supports an early career scientist for their first time as PI.Even though the internal structure of CMEs has been the main focus of numerous studies over the past several decades, there are still large ambiguities regarding their structure. In spite of having decades of in situ measurements of CMEs in the near-Earth environment, shortcomings of the existing techniques, codes and models limit what we can learn about these important and complex structures. The current lack of understanding can be summarized into two main points: (1) limitations of the measurements themselves, and more importantly, (2) limitations due to the assumptions made to analyze these measurements. The majority of performed studies still assume a cylindrical symmetric Linear force-free (Lundquist) solution. At the same time, new remote observations of CMEs in their infancy at the Sun and later on, as they propagate, reveal how complex these structures are. This project will incorporate more of the physical features of observed and simulated CMEs into fitting and reconstruction codes, including their expansion and evolution over time (aging), the effect of spacecraft trajectory, and the existence of more complex magnetic field structures than just a well-organized circular twisted magnetic flux rope.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.
该奖项旨在支持日冕物质抛射(CME)结构的研究。CME是太阳或风暴的爆发,向太阳系释放数十亿吨的物质和强大的电磁场。当它们直接到达地球时,通常需要大约三天的时间才能到达,然而,非常强大的风暴可以在短短18小时内到达。这使得很少有时间准备卫星和电网中断。CME在太阳系中移动时会改变特性。因此,了解其结构以及这些变化是如何发生的,对于了解CME何时到达地球以及它将如何影响地球的磁场和我们的基本资产非常重要。该项目支持一位早期职业科学家首次担任PI。尽管CME的内部结构在过去几十年中一直是众多研究的主要焦点,但关于它们的结构仍然存在很大的模糊性。尽管有几十年的近地环境中的CME现场测量,现有的技术,代码和模型的缺点限制了我们可以了解这些重要而复杂的结构。目前的认识不足可以归纳为两个主要点:(1)测量本身的局限性,更重要的是,(2)由于分析这些测量所做的假设而产生的局限性。大多数研究仍然假设圆柱对称线性无力(Lundquist)解。与此同时,新的远程观测CME在太阳的婴儿期和后来的传播,揭示了这些结构是多么复杂。该项目将把观测到的和模拟的日冕物质抛射的更多物理特征纳入拟合和重建代码,包括它们随时间的扩展和演变(老化),航天器轨道的影响,以及存在比井更复杂的磁场结构-该奖项反映了NSF的法定使命,并已被认为是值得通过评估使用的支持,基金会的学术价值和更广泛的影响审查标准。
项目成果
期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Investigating the Magnetic Structure of Interplanetary Coronal Mass Ejections Using Simultaneous Multispacecraft In Situ Measurements
使用同步多航天器原位测量研究行星际日冕物质抛射的磁结构
- DOI:10.3847/1538-4357/acef16
- 发表时间:2023
- 期刊:
- 影响因子:0
- 作者:Regnault, F.;Al-Haddad, N.;Lugaz, N.;Farrugia, C. J.;Yu, W.;Davies, E. E.;Galvin, A. B.;Zhuang, B.
- 通讯作者:Zhuang, B.
Investigating the Cross Sections of Coronal Mass Ejections through the Study of Nonradial Flows with STEREO/PLASTIC
- DOI:10.3847/1538-4357/ac32e1
- 发表时间:2021-10
- 期刊:
- 影响因子:0
- 作者:N. Al-Haddad;A. Galvin;N. Lugaz;C. Farrugia;Wenyuan Yu
- 通讯作者:N. Al-Haddad;A. Galvin;N. Lugaz;C. Farrugia;Wenyuan Yu
Investigating the Asymmetry of Magnetic Field Profiles of “Simple” Magnetic Ejecta through an Expansion-modified Flux Rope Model
通过膨胀修正磁通绳模型研究“简单”磁喷射物磁场分布的不对称性
- DOI:10.3847/1538-4357/ac88c3
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Yu, Wenyuan;Al-Haddad, Nada;Farrugia, Charles J.;Lugaz, Noé;Regnault, Florian;Galvin, Antoinette
- 通讯作者:Galvin, Antoinette
Modeling CME encounters at Parker Solar Probe with OSPREI: Dependence on photospheric and coronal conditions
- DOI:10.1051/0004-6361/202245445
- 发表时间:2023-05-12
- 期刊:
- 影响因子:6.5
- 作者:Ledvina,Vincent E.;Palmerio,Erika;Riley,Pete
- 通讯作者:Riley,Pete
Effects of coronal mass ejection orientation on its propagation in the heliosphere
日冕物质抛射方向对其在日光层传播的影响
- DOI:10.1051/0004-6361/202346858
- 发表时间:2023
- 期刊:
- 影响因子:6.5
- 作者:Martinić, K.;Dumbović, M.;Čalogović, J.;Vršnak, B.;Al-Haddad, N.;Temmer, M.
- 通讯作者:Temmer, M.
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Nada Al-Haddad其他文献
The Magnetic Field Structure of Coronal Mass Ejections: A More Realistic Representation
日冕物质抛射的磁场结构:一种更现实的表示
- DOI:
10.1007/s11214-025-01138-w - 发表时间:
2025-02-01 - 期刊:
- 影响因子:7.400
- 作者:
Nada Al-Haddad;Noé Lugaz - 通讯作者:
Noé Lugaz
The Need for Near-Earth Multi-Spacecraft Heliospheric Measurements and an Explorer Mission to Investigate Interplanetary Structures and Transients in the Near-Earth Heliosphere
- DOI:
10.1007/s11214-024-01108-8 - 发表时间:
2024-09-20 - 期刊:
- 影响因子:7.400
- 作者:
Noé Lugaz;Christina O. Lee;Nada Al-Haddad;Robert J. Lillis;Lan K. Jian;David W. Curtis;Antoinette B. Galvin;Phyllis L. Whittlesey;Ali Rahmati;Eftyhia Zesta;Mark Moldwin;Errol J. Summerlin;Davin E. Larson;Sasha Courtade;Richard French;Richard Hunter;Federico Covitti;Daniel Cosgrove;J. D. Prall;Robert C. Allen;Bin Zhuang;Réka M. Winslow;Camilla Scolini;Benjamin J. Lynch;Rachael J. Filwett;Erika Palmerio;Charles J. Farrugia;Charles W. Smith;Christian Möstl;Eva Weiler;Miho Janvier;Florian Regnault;Roberto Livi;Teresa Nieves-Chinchilla - 通讯作者:
Teresa Nieves-Chinchilla
Nada Al-Haddad的其他文献
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{{ truncateString('Nada Al-Haddad', 18)}}的其他基金
Solar Heliospheric and INterplanetary Environment (SHINE) Workshop, 2023-2027
太阳日光层和行星际环境 (SHINE) 研讨会,2023-2027
- 批准号:
2313220 - 财政年份:2023
- 资助金额:
$ 38.12万 - 项目类别:
Continuing Grant
EAGER: Developing an Ab initio Model of Coronal Mass Ejections (CMEs) Incorporating All Forms of Helicity
EAGER:开发包含所有形式螺旋度的日冕物质抛射 (CME) 从头算模型
- 批准号:
2027322 - 财政年份:2020
- 资助金额:
$ 38.12万 - 项目类别:
Standard Grant
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