RUI: Coronal Heating Studies at the 1994 Eclipse

该计划建议通过观测1994年11月3日日全食时的日冕振荡频谱来研究日冕的加热。日全食在持续时间、天空晴朗度和天气预报方面都是一次有利的日食。这些观测提供了一种机制的测试，以解释通过阿尔芬波加热太阳日冕的机制。加热发生在太阳风形成的区域。我们先前对1980年和1983年日全食的观测表明，在0.5和2hz之间的傅里叶变换有多余的功率。探险队在观测1991年7月1日的日全食时受到了阴云的影响。新实验在以往观测的基础上进行了多方面的改进，包括改进了数字化和数据记录，改进了日全食短时间内的图像采集，通过大幅度改进跟踪，大大扩大了观测频率范围。在日食时对日冕的研究一直是威廉姆斯学院天文系成功吸引和培养学生的一个主要部分。本科生与我们之前的日食考察以及相关的数据减少和分析密切相关，这项提议将使PI继续积极参与学生。

The PI proposes to study the heating of the solar corona by observing the coronal oscillation spectrum at the total solar eclipse of 3 November 1994, a favorable solar eclipse in terms of duration, sky clarity, and weather forecasts. The observations provide tests of a mechanism to explain the heating of the solar corona via Alfven waves. The heating takes place in the region of formation of the solar wind. Prior observations we made at the total solar eclipses of 1980 and 1983 indicate excess power in the Fourier transforms between 0.5 and 2 Hz. The expedition was clouded out of the observing the 1 July 1991 total solar eclipse. The proposed new experiment improves on the prior observations in a variety of ways, including improved digitization and data recording, improved image acquisition during the brief period of totality, and a major expansion of the frequency range under observation through greatly improved tracking. Studies of the solar corona at eclipses have been a major part of the success of the Astronomy Department at Williams College in attracting and training students. Undergraduate students have been intimately connected with our prior eclipse expeditions and the associated data reduction and analysis, and this proposal will enable the PI to continue the active involvement of students.