Forward Fitting Methods for Radio Spectral Diagnostics of Solar Flares

PI将开发用于分析成像无线电光谱数据的新方法。 这些方法将为诊断太阳耀斑中的快速粒子和等离子体参数提供可靠的工具，这是成像无线电光谱学的关键目标之一。该项目将开发涉及粒子加速，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改（由于角扩散和各向异性传输效应）的理论模型。 非热无线电发射的模型将被构建为包括相关的发射和吸收过程（主要是回旋同步加速器和自由-自由发射/吸收），以及其他相干和非相干过程。 将对这些模型进行自我一致性测试，并将其应用于现有的高分辨率数据。特别是，PI将仔细检查来自日本野边山射电日像仪的高空间分辨率太阳耀斑观测数据和来自加州欧文斯谷太阳能阵列的高光谱分辨率数据。这项工作将提供分析现有无线电数据所需的可靠的前向拟合模型，并最大限度地提高正在开发的新无线电仪器的科学回报，如频率捷变太阳射电望远镜（FASR）和扩展的甚大阵列（EVLA）。 这项工作的更广泛影响将包括传播有关天体物理能量释放和带电粒子加速过程的新知识。 这些研究将在新泽西理工学院的日地研究中心（CSTR）进行，推进发现和理解，同时促进多样化大学环境中的教学，培训和学习。

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.