Forward Fitting Methods for Radio Spectral Diagnostics of Solar Flares

太阳耀斑射电光谱诊断的正向拟合方法

• 批准号: 0707319
• 负责人: Gregory Fleishman
• 金额: --
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2010-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0707319&HistoricalAwards=false
• 关键词: Forward; Fitting; Methods; Radio; Spectral

The PI will develop new methods for the analysis of imaging radio spectroscopy data. These methods will provide reliable tools for diagnosing fast particle and plasma parameters in solar flares, one of the key objectives of imaging radio spectroscopy. The project will develop theoretical models involving particle acceleration, energy-dependent and angle-dependent particle losses, and pitch-angle anisotropy modifications (due to both angular diffusion and anisotropic transport effects). Models of nonthermal radio emission will be constructed to include relevant emission and absorption processes (primarily gyrosynchrotron and free-free emission/absorption), as well as other coherent and incoherent processes. These models will be tested for self-consistency and applied to high-resolution data as available. In particular, the PI will carefully examine high spatial resolution solar flare observations from the Nobeyama Radioheliograph in Japan and high spectral resolution data from the Owens Valley Solar Array in California. This effort will provide reliable forward-fitting models needed to analyze currently available radio data and to maximize the scientific return from new radio instruments in development, such as the Frequency-Agile Solar Radiotelescope (FASR) and the Expanded Very Large Array (EVLA). The broader impacts of this work will include dissemination of new knowledge concerning the processes of astrophysical energy release and charged particle acceleration. The studies will be performed at the Center for Solar-Terrestrial Research (CSTR) at the New Jersey Institute of Technology, advancing discovery and understanding while promoting teaching, training, and learning in a diverse university setting.

PI将开发新方法，用于分析成像无线电光谱数据。 这些方法将提供可靠的工具来诊断太阳耀斑中的快速粒子和等离子体参数，这是成像无线电光谱的关键目标之一。该项目将开发涉及粒子加速度，能量依赖性和角度依赖性粒子损失以及俯仰角各向异性修饰的理论模型（由于角扩散和各向异性传输效应）。 将构建非热无线电发射的模型，包括相关的发射和吸收过程（主要是陀螺仪和免费的发射/吸收/吸收），以及其他相干和不相互分的过程。 这些模型将经过自相连的测试，并应用于可用的高分辨率数据。特别是，PI将仔细检查日本Nobeyama RevileHeliograph的高空间分辨率太阳耀斑观测以及来自加利福尼亚州Owens Valley太阳能电池阵列的高光谱分辨率数据。这项工作将提供可靠的前进模型，以分析当前可用的无线电数据，并最大程度地利用开发的新无线电仪器的科学回报，例如频率 - 高速太阳能辐射镜（FASR）和扩展的非常大的阵列（EVLA）。 这项工作的更广泛的影响将包括传播有关天体物理能量释放和带电颗粒加速的过程的新知识。 这些研究将在新泽西理工学院的太阳能研究中心（CSTR）中进行，在促进多元化大学环境中促进教学，培训和学习的同时，提高发现和理解。