Studies of the Solar Wind Near the Sun

太阳附近太阳风的研究

• 批准号: 9207864
• 负责人: William Coles
• 金额: $ 30.35万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9207864&HistoricalAwards=false
• 关键词: Studies; Solar; Wind; Near; Sun

This grant is to study the solar wind near the sun using a variety of radio propagation methods. The results of this "radio probing" will be compared with other ground-based coronal observations and with in-situ observations from space-craft. The basic objectives are to understand the mechanism(s) of coronal heating and of solar wind acceleration, and the relationship between large scale photospheric structures and large scale solar wind structures. Ultimately, such understanding is necessary to understand the coupling between the sun and the earth, enabling us to understand and even to predict conditions in the space environment around the earth. The radio-remote-sensing observations detect the results of phase modulation of radio waves passing through the solar wind in various ways. This phase modulation is linearly proportional to the electron density. Thus one observed the effects of electron density fluctuations. The simplest observation is to measure the solar wind velocity. However, the velocity is not the only information one can derive. One can also estimate the spatial spectrum of these density fluctuations and how they are couples to velocity fluctuations. One can see the effects of plasma waves in these observations and test their consistency with theoretical wave spectra. One could use these methods to provide ground-based support for the ULYSSES polar-orbiting space-craft. The ULYSSES mission will provide perhaps the only opportunity to directly observe the solar poles in this generation. #

这项拨款是为了研究太阳附近的太阳风， 各种无线电传播方式。 这个“无线电”的结果 探测”将与其他地面日冕 观测和从航天器进行的现场观测。 的 基本目标是了解日冕的机制 加热和太阳风加速， 大尺度光球结构和大尺度太阳能 风结构。 最终，这种理解是必要的， 了解太阳和地球之间的耦合， 去了解甚至预测宇宙中的情况 地球周围的环境。 无线电遥感观测探测到的结果 通过太阳风的无线电波的相位调制 各种方式 该相位调制与以下线性成比例： 电子密度。 因此，人们观察到电子的影响， 密度波动 最简单的观察是测量 太阳风速度 然而，速度并不是唯一的 一个人可以得到的信息。 也可以估计空间 这些密度波动的频谱以及它们如何与 速度波动 人们可以看到等离子体波的影响， 这些观测结果，并测试其与理论波的一致性 谱 人们可以使用这些方法来提供基于地面的 支持ULYSSES极地轨道航天器。 尤利西斯 使命将提供可能是唯一的机会， 观察这一代的太阳两极。 #