3D Magnetic and Thermal Structure of Active Regions of the Sun

太阳是获得磁场结构和活动线索的最佳天体物理实验室，因为可以跨时间框架和物理大小研究磁场，这是开始了解磁场的复杂结构和动力学所需的。该项目旨在通过集中精力研究太阳磁场来量化日冕中的磁性。研究人员将创建逼真的三维(3D)建模工具，以研究测量太阳活动区(AR)日冕磁场结构和重建AR加热结构的基础科学问题。这种新的建模将增强研究人员现有的AR建模能力，并使用他们已经开发的所有高级建模工具和计算机代码。该项目将制作新的科学产品，如日冕磁场地图，以及使用观测数据建立单个AR的3D模型。该项目通过促进我们对太阳磁场结构和活动的了解来支持国家科学基金会的任务。该研究小组为联合县职业磁铁学校的高中生建立了一个暑期实习研究计划，该计划专注于科学，在该计划下开发的工具将被大量使用。该项目利用从各种现代无线电干涉测量阵列获得的无线电数据的广泛、定量的使用，并将这些诊断与更传统的EUV和光学数据以及基于这些数据的日冕建模方法(特别是非线性无力场建模)相结合。研究人员将利用来自太阳活动区的无线电成像光谱数据的新的科学能力，通过先进的理论和回旋共振(GR)和自由发射的3D建模来增强。GR过程使射电发射具有在日冕中直接测量磁场强度和方向的能力，因此为理解所有太阳活动的基本机制提供了关键。对观测数据的解释有赖于建立全面的大气模型，包括等离子体和磁场模型，然后通过前向拟合将其与数据进行匹配。这些理论和建模工作是必要的，以利用现在来自VLA、Expanded OVSA(EOVSA)和Atakama Large毫米波/亚毫米阵列(ALMA)等多个无线电仪器的强大的新无线电数据。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The Sun is the best astrophysical laboratory for obtaining clues to magnetic field structure and activity because the magnetic field can be studied across time frames and physical sizes needed to begin understanding both the complex structure and dynamics of the magnetic field. This project aims to quantify magnetism in the solar corona using focused efforts to study the solar magnetic field. The investigators will create realistic 3-Dimensional (3D) modeling tools to study the basic science problem of measuring the coronal magnetic field structure in solar active regions (AR) and reconstructing AR heating structure. This new modeling will augment the investigators' existing capabilities for AR modeling, and use all of the advanced modeling tools and computer codes they have already developed. The project will make new scientific products such as maps of the coronal magnetic field, and 3D models of individual ARs built using input from observations. This project supports the mission of the NSF by promoting our understanding of magnetic field structure and activity at the Sun. The research group has established a summer internship research program for high school students in the Union County Vocational Magnet School having concentration on Science, where the tools developed under this project will be heavily used.This project leverages an extensive, quantitative use of radio data available from a variety of modern radio interferometry arrays and combines these diagnostics with more traditional EUV and optical data as well as coronal modeling approaches based on these data (in particular, nonlinear force-free field modeling). The investigators will employ new science capabilities of the radio imaging spectroscopy data from solar active regions, augmented by advanced theory and 3D modeling of gyroresonance (GR) and free-free emission. The GR process gives radio emission its ability to provide direct measurements in the corona of magnetic field strength and direction, and so provides the key to understanding the basic mechanisms underlying all of solar activity. Interpretation of the observations relies on construction of comprehensive models for the atmosphere, including both plasma and magnetic field models, which are then matched to the data through forward fitting. These theory and modeling efforts are needed in order to exploit the powerful new radio data coming online now from a number of radio instruments including the VLA, Expanded OVSA (EOVSA), and Atacama Large Millimeter/submillimeter Array (ALMA).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.