Advanced models of the solar transition region and corona

太阳过渡区和日冕的高级模型

• 批准号: ST/X001059/1
• 负责人: Giulio Del Zanna
• 金额: $ 54.61万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FX001059%2F1
• 关键词: Advanced; models; solar; transition; region

Current and upcoming solar missions are providing a wealth of novel observations of the upper chromosphere, transition region, and corona. They will be key in our efforts to address various science questions such as: how is energy transferred between the chromosphere and the corona? How is energy released in the corona and what is the connection with the solar wind?The observations can provide key plasma parameters such as densities, temperatures, chemical abundances and coronal magnetic fields. Measuring chemical abundances in the transition region and corona is important as their variations are likely related to the (yet unknown) plasma heating processes occurring in the corona and acting in the chromosphere. Also, as they can be used as a tracer for the solar wind. The coronal magnetic field dominates the energetics in the solar corona, yet its measurements have been elusive until recently. However, the full scientific exploitation of these observations requires a long-term effort on the theory and modelling side. The present project provides a significant contribution by building and providing to the community advanced models, with additional physics included. These models will also be used to improve measurements of the above key plasma parameters.Major facilities, with strong STFC support, are Solar Orbiter and DKIST. One of the main science goals of Solar Orbiter, which has now entered its science phase, is to understand how and where the solar wind is released and accelerated, by comparing in-situ with remote-sensing observations of the plasma parameters, during close encounters (to within 0.3 AU) with the Sun. SPICE, a UV spectrometer built in the UK, is mainly providing observations of the chromosphere and transition region.The advanced models will improve the SPICE measurements of temperatures and chemical abundances. They will also provide a building block for studies of the poorly understood connection between the chromosphere and the corona, which is very difficult to model as it requires complex non-local transport, time-dependent effects and non-LTE atomic physics. Studies on the formation mechanisms of helium and oxygen ions will be carried out. DKIST is the first large-scale solar telescope that will be performing unprecedented routine spectro-polarimetric observations of the chromosphere (on-disk) and the corona, mostly in the near-infrared (NIR). We will predict with the advanced atomic models the helium coronal emission, needed to establish its formation mechanism and to obtain the He coronal abundance and the magnetic field from DKIST observations. We will also improve our knowledge of the NIR with upcoming AIR-Spec and CORSAIR missions. Finally, we plan to revise recent measurements of active region coronal magnetic fields using existing Hinode EIS observations, by taking into account improvements in the instrument calibration and various physical effects (e.g. opacity and non-thermal electrons) not previously considered.

当前和即将进行的太阳任务正在提供对上层色球层、过渡区和日冕的大量新颖观测。它们将成为我们解决各种科学问题的关键，例如：能量如何在色球层和日冕之间转移？日冕中的能量是如何释放的？与太阳风有何联系？观测可以提供关键的等离子体参数，例如密度、温度、化学丰度和日冕磁场。测量过渡区和日冕中的化学丰度很重要，因为它们的变化可能与日冕中发生并作用于色球层的（但未知）等离子体加热过程有关。此外，它们还可以用作太阳风的示踪剂。日冕磁场在太阳日冕的能量学中占主导地位，但直到最近它的测量结果仍然难以捉摸。然而，对这些观察结果的充分科学利用需要在理论和建模方面进行长期的努力。本项目通过构建并向社区提供先进模型（包括附加物理场）做出了重大贡献。这些模型还将用于改进上述关键等离子体参数的测量。在 STFC 的大力支持下，主要设施是太阳轨道器和 DKIST。太阳轨道飞行器现已进入科学阶段，其主要科学目标之一是通过在近距离接触期间对等离子体参数的原位观测与遥感观测进行比较，了解太阳风如何以及在何处释放和加速。 （在 0.3 天文单位内）与太阳。 SPICE是英国建造的紫外光谱仪，主要提供色球层和过渡区的观测。先进的模型将改进SPICE对温度和化学丰度的测量。它们还将为研究色球层和日冕之间人们知之甚少的联系提供一个基础，这种联系很难建模，因为它需要复杂的非局域传输、时间相关效应和非 LTE 原子物理。将开展氦离子和氧离子形成机制的研究。 DKIST 是第一台大型太阳望远镜，将对色球层（盘上）和日冕进行前所未有的常规光谱偏振观测，主要是在近红外 (NIR) 范围内。我们将使用先进的原子模型预测氦日冕发射，这是建立其形成机制并从 DKIST 观测中获得氦日冕丰度和磁场所需的。我们还将通过即将到来的 AIR-Spec 和 CORSAIR 任务来提高我们对 NIR 的了解。最后，我们计划通过考虑仪器校准的改进和以前未考虑的各种物理效应（例如不透明度和非热电子），使用现有的 Hinode EIS 观测来修改最近对活动区日冕磁场的测量。

项目成果

Dark Halos around Solar Active Regions. I. Emission properties of the Dark Halo around NOAA 12706

太阳活动区域周围的暗晕。

• DOI: 10.48550/arxiv.2309.11956
• 发表时间: 2023
• 作者: Lezzi S

The First Flight of the Marshall Grazing Incidence X-Ray Spectrometer (MaGIXS)

马歇尔掠射 X 射线光谱仪 (MaGIXS) 的首次飞行

• DOI: 10.3847/1538-4357/acbb58
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Savage S

Dark halos around solar active regions I. Emission properties of the dark halo around NOAA 12706

太阳活动区周围的暗晕 I. NOAA 12706 周围暗晕的发射特性

• DOI: 10.1051/0004-6361/202347414
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Lezzi S

Multi-wavelength observations of a B-class flare using XSM, AIA, and XRT

使用 XSM、AIA 和 XRT 对 B 级耀斑进行多波长观测

• DOI: 10.48550/arxiv.2308.14912
• 发表时间: 2023
• 作者: Rao Y

The Solar Particle Acceleration Radiation and Kinetics (SPARK) Mission Concept

• DOI: 10.3390/aerospace10121034
• 发表时间: 2023-12
• 期刊: Aerospace
• 影响因子: 2.6
• 作者: H. Reid;Sophie Musset;D. Ryan;V. Andretta;F. Auchère;Deborah Baker;F. Benvenuto;Philippa Browning;É. Buchlin;Ariadna Calcines Rosario;Steven Christe;Alain Jody Corso;J. Dahlin;Silvia Dalla;G. del Zanna;C. Denker;J. Dudík;R. Erdélyi;I. Ermolli;Lyndsay Fletcher;A. Fludra;Lucie M. Green;M. Gordovskyy;S. Guglielmino;I. Hannah;Richard Harrison;Laura A. Hayes;Andrew R. Inglis;N. Jeffrey;J. Kašparová;Graham S. Kerr;C. Kintziger;E. P. Kontar;S. Krucker;Timo Laitinen;P. Laurent;O. Limousin;David M. Long;S. Maloney;P. Massa;A. Massone;Sarah A. Matthews;Tomasz Mrozek;Valery M. Nakariakov;S. Parenti;Michele Piana;Vanessa Polito;M. Pesce-Rollins;P. Romano;A. Rouillard;Clementina Sasso;Albert Y. Shih;M. Stȩślicki;D. Orozco Suárez;L. Teriaca;Meetu Verma;Astrid M. Veronig;N. Vilmer;C. Vocks;A. Warmuth