Solar Magnetic Evolution and Complexity: Dundee-Durham Consortium

太阳磁演化和复杂性：邓迪-达勒姆联盟

• 批准号: ST/W00108X/1
• 负责人: Anthony Yeates
• 金额: $ 57.37万
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FW00108X%2F1
• 关键词: Solar; Magnetic; Evolution; Complexity; Dundee

This project continues an established and successful collaboration between researchers at the Universities of Dundee and Durham on the structure and dynamics of the Sun's magnetic field. This magnetic field dominates the Sun's atmosphere, controlling both the large-scale structure seen (for example) in total eclipse photographs, and also dynamical events on a wide range of scales. It plays a fundamental role in the celebrated problem of how the solar atmosphere is heated to millions of degrees, and structures not only the low atmosphere of the Sun but also that of the wider "heliosphere", encompassing the Earth.Far from an intellectual curiosity, the Sun's magnetic field has a direct impact on Earth and the near-Earth environment, through space weather events such as flares, coronal mass ejections, or solar energetic particle events. Resulting geomagnetic storms create the Northern and Southern lights, but also have the potential for damaging economic impacts on engineered systems ranging from satellites and communication systems to power grids and pipelines. Our work will address both the underlying magnetic environment - which can change both over the 11-year solar cycle and from one cycle to the next - but also the origins of individual events, which come from magnetic energy releases deep in the solar corona.The overarching aim of the Consortium is to explore the causes and consequences of magnetic complexity in the solar corona - a system that is far from static equilibrium. Can we explain the latest generation of high-resolution observations? Does the small-scale complexity that is being revealed by these observations have consequences even for large-scale outputs such as flares, coronal mass ejections, or the solar wind? The various projects within the consortium will carry out theoretical and numerical modelling for a range of different setups, carefully chosen to model the essential features of the solar corona, including active regions (around sunspots), coronal loops, open magnetic field lines (that extend out into the solar system), and the sources of solar flares, coronal mass ejections and the solar wind. Several of our models will be directly "data-driven", taking input from telescopes, including recently digitized historical data for the past 100 years. A variety of observations from the latest ground-based and satellite telescopes, and Parker Solar Probe, will be used to validate our models. Our study of small-scale behaviour will inform the interpretation of these novel high-resolution observations of the corona. As well as probing fundamental physics relevant more widely to astrophysical plasmas, the insight gained from our simulations will have practical application in the space-weather forecasting community. It is becoming apparent that forecasting the occurrence and impact of space weather events cannot rely on the traditional static extrapolation models, but requires a deep understanding of the dynamical behaviour, and potentially the fine structure, of the Sun's magnetic field.

该项目延续了邓迪大学和达勒姆大学研究人员在太阳磁场结构和动力学方面已建立并取得成功的合作。这个磁场控制着太阳的大气层，控制着(例如)日全食照片中看到的大尺度结构，也控制着大范围内的动态事件。在太阳大气如何被加热到数百万度这一著名问题上，太阳磁场起着基础性的作用，它不仅构成了太阳的低层大气，而且还构成了包括地球在内的更广泛的“日球层”。与学术上的好奇心不同，太阳磁场通过空间天气事件，如耀斑、日冕物质抛射或太阳高能粒子事件，直接影响地球和近地环境。由此产生的地磁风暴会产生北极光和南方光，但也可能对从卫星和通信系统到电网和管道等工程系统造成破坏性的经济影响。我们的工作既将研究潜在的磁环境--它可以在11年的太阳周期中发生变化，也可以从一个太阳周期到下一个太阳周期--也将研究个别事件的起源，这些事件来自日冕深处的磁能释放。该联盟的首要目标是探索日冕--一个远离静态平衡的系统--磁复杂性的原因和后果。我们能解释一下最新一代的高分辨率观测吗？这些观测揭示的小尺度复杂性是否甚至对大尺度的输出，如耀斑、日冕物质抛射或太阳风也有影响？该联盟内的各种项目将对一系列不同的设置进行理论和数值模拟，精心选择这些设置来模拟太阳日冕的基本特征，包括活动区(太阳黑子周围)、日冕环、开放磁力线(延伸到太阳系)以及太阳耀斑、日冕物质抛射和太阳风的来源。我们的几个模型将直接“数据驱动”，接受来自望远镜的输入，包括最近数字化的过去100年的历史数据。来自最新的地面和卫星望远镜以及帕克太阳探测器的各种观测将被用来验证我们的模型。我们对小尺度行为的研究将有助于解释这些新颖的高分辨率日冕观测结果。除了探索更广泛地与天体物理等离子体相关的基础物理之外，我们从模拟中获得的见解将在空间天气预报领域具有实际应用。越来越明显的是，预测空间气象事件的发生和影响不能依赖传统的静态外推模型，而需要对太阳磁场的动力学行为和潜在的精细结构有深入的了解。

项目成果

Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun

• DOI: 10.3847/1538-4357/acd77e
• 发表时间: 2023-05
• 期刊: The Astrophysical Journal
• 作者: Shaonwita Pal;P. Bhowmik;Sushant S. Mahajan;D. Nandy

Interchange reconnection dynamics in a solar coronal pseudo-streamer

日冕伪流光中的交换重联动力学

• DOI: 10.1051/0004-6361/202245611
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Pellegrin-Frachon T

A Near-half-century Simulation of the Solar Corona

• DOI: 10.3847/2041-8213/ad1934
• 发表时间: 2024-01
• 期刊: The Astrophysical Journal Letters
• 作者: Valentin Aslanyan;Karen A. Meyer;R. Scott;A. Yeates

Plasmoids, Flows, and Jets during Magnetic Reconnection in a Failed Solar Eruption

失败的太阳喷发中磁重联过程中的等离子体团、流和喷流

• DOI: 10.3847/1538-4357/acaea4
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Kumar, Pankaj;T. Karpen, Judith;Antiochos, Spiro K.;DeVore, C. Richard;Wyper, Peter F.;Cho, Kyung-Suk
• 通讯作者: Cho, Kyung-Suk

Eruptivity Criteria for Solar Coronal Flux Ropes in Magnetohydrodynamic and Magnetofrictional Models

磁流体动力学和磁摩擦模型中太阳日冕通量绳的喷发准则

• DOI: 10.3847/1538-4357/acefc1
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Rice O