Imaging Spectroscopy of Coherent Radio Bursts on the Sun: a New Probe of Magnetic Energy Release

太阳相干射电爆发的成像光谱：磁能释放的新探测器

• 批准号: 1010652
• 负责人: John Hawley
• 金额: $ 13.52万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-06-15 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1010652&HistoricalAwards=false
• 关键词: Imaging; Spectroscopy; Coherent; Radio; Bursts

This project will solely support a promising graduate student and form the basis of his Ph.D. thesis at the University of Virginia. The senior proposers will supervise this student in his study of coherent radio bursts as a diagnostic of magnetic energy release in solar flares. Under their guidance, the student will utilize state-of-the-art radio instrumentation to make fundamentally new observations of coherent bursts from flares, in the form of dynamic broadband imaging spectroscopy at decimeter wavelengths. These observations will allow the locations of flare magnetic energy release to be pinpointed, and the temporal and spatial evolution of these locations to be tracked. Depending on the particular type of radio burst, such observations can place constraints on the magnetic field and plasma density in and around the energy release sites of solar flares. The new technique of broadband imaging spectroscopy at radio wavelengths promises to be transformative in solar physics. The proposers will exploit the newly upgraded instrumentation at the Expanded Very Large Array (EVLA, a facility of the National Radio Astronomy Observatory, or NRAO), as well as the Frequency Agile Solar Radiotelescope (FASR) Subsystem test bed array and the Owens Valley Solar Array, two university instruments operated by the New Jersey Institute of Technology at the Owens Valley Radio Observatory in California. This project will directly support the education and training of a promising PhD student and will contribute to the successful commissioning of the EVLA radiotelescope. EVLA is an extraordinary and powerful new instrument that will dramatically enhance existing research infrastructure and transform our capabilities for radio observations of the Sun. EVLA will also support a broad user community and make possible scientific studies that will have direct impact on our understanding of space weather phenomena.

这个项目将只支持一个有前途的研究生，并构成他在弗吉尼亚大学的博士论文的基础。资深建议者将指导该学生研究相干射电爆发作为诊断太阳耀斑中磁能释放的方法。在他们的指导下，学生将利用最先进的无线电仪器，以分米波长的动态宽带成像光谱的形式，对耀斑的相干爆发进行全新的观测。这些观测将有助于确定耀斑磁能释放的位置，并跟踪这些位置的时空演变。根据特定类型的射电暴，这样的观测可以对太阳耀斑能量释放点及其周围的磁场和等离子体密度进行限制。无线电波段宽带成像光谱学的新技术有望在太阳物理学领域带来变革。提议者将利用新升级的仪器，包括美国国家射电天文台（NRAO）的扩展甚大阵列（EVLA），以及频率敏捷太阳射电望远镜（FASR）子系统测试平台阵列和欧文斯谷太阳能阵列，这两种大学仪器由新泽西州理工学院在加利福尼亚州的欧文斯谷射电天文台运行。该项目将直接支持一名有前途的博士生的教育和培训，并将有助于EVLA射电望远镜的成功调试。EVLA是一种非凡而强大的新仪器，它将极大地增强现有的研究基础设施，并改变我们对太阳的无线电观测能力。EVLA还将支持广泛的用户社区，并使科学研究成为可能，这些研究将对我们对空间天气现象的理解产生直接影响。