Radioastronomical Studies of Plasmas from the Solar Corona to the Orbit of the Earth

摘要：ATM 99-86887建议标题：从日冕到地球轨道等离子体的射电天文研究主要研究员：爱荷华州大学史蒂文·R·斯潘格勒研究人员将利用射电天文观测，在距太阳0.28个天文单位的范围内更多地了解日冕和太阳风，这是一个从未进行过直接测量的太空区域。主要的努力是使用射电望远镜，如甚大阵列和绿岸望远镜，以观察遥远的天文射电源，当它们被日冕和太阳内部风掩蔽时。日冕和太阳风的等离子体特征是从无线电波的扭曲和修改中推断出来的，这种现象通常被称为星际闪烁。法拉第自转数据将被用来构建和改进外日冕和内太阳风中的等离子体密度和磁场模型。观测将得到一个理论研究计划的支持，该计划旨在开发该空间区域的等离子体湍流模型。工作将集中在等离子体湍流的简化理论上，尽管如此，该理论仍具有足够的现实性来解释太阳风湍流的主要观测特征。

Abstract: ATM 99-86887Proposal Title: Radioastronomical Studies of Plasmas from the Solar Corona to the Orbit of EarthPrincipal Investigator: Steven R. Spangler, University of Iowa The investigators will employ radioastronomical observations to learn more about the solar corona and the solar wind within 0.28 astronomical units of the Sun, a region of space where direct measurements have never been made. The main effort is to use radio telescopes such as the Very Large Array and the Green Bank Telescope to observe distant, astronomical radio sources when they are occulted by the corona and the inner solar wind. Plasma characteristics of the corona and solar wind are inferred from distortions and modifications of the radio waves, a phenomenon generically known as interplanetary scintillation. Faraday rotation data will be used to construct and refine a model of the plasma density and magnetic field in the outer corona and inner solar wind. Observations will be supported by a program of theoretical research to develop models for plasma turbulence in this region of space. Effort will be concentrated on simplified theories of plasma turbulence, which nonetheless possess sufficient realism to explain the main observed features of the solar wind turbulence.