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.

当前和即将到来的太阳能任务提供了对上染色体，过渡区和电晕的大量新观察。这将是我们努力解决各种科学问题的关键，例如：色球和电晕之间的能量如何转移？电晕中的能量如何释放，与太阳风有什么联系？观察结果可以提供关键的等离子体参数，例如密度，温度，化学丰度和冠状磁场。测量过渡区域和电晕的化学丰度很重要，因为它们的变化可能与（但未知的）血浆加热过程有关，在电晕中发生并在染色体中起作用。另外，由于它们可以用作太阳风的示踪剂。冠状磁场在太阳能电晕中占主导地位，但直到最近，其测量值一直难以捉摸。但是，对这些观察结果的全面科学剥削需要在理论和建模方面做出长期努力。本项目通过构建和为社区高级模型提供了重大贡献，其中包括其他物理学。这些模型还将用于改善上述关键等离子体参数的测量。具有强大的STFC支持的Major设施是太阳轨道和DKIST。现已进入其科学阶段的太阳轨道的主要科学目标之一是通过将原位与对等离子体参数的远程感应观察（在0.3 au之内）进行比较，以了解太阳风的释放和何处。香料是在英国建造的紫外线光谱仪，主要提供对色球和过渡区域的观察。高级模型将改善温度和化学丰度的香料测量。他们还将为研究染色体和电晕之间不理解的联系提供一个基础，这很难建模，因为它需要复杂的非本地运输，时间依赖性效应和非LTE原子理物理学。将对氦气和氧离子的形成机理进行研究。 DKIST是第一个大型太阳能望远镜，它将进行染色体球（磁层）和电晕的前所未有的常规光相光观测，主要是在近红外（NIR）。我们将使用先进的原子模型预测氦冠状发射，以建立其形成机理并从DKIST观测中获得冠状丰度和磁场。我们还将通过即将到来的空中规格和海盗仪式来提高NIR的了解。最后，我们计划使用现有的Hinode EIS观测值来修改活动区域冠状磁场的最新测量，并考虑到仪器校准的改进和以前不考虑的各种物理效应（例如不透明度和非热电子）。

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