RUI: Coronal Heating Studies at the 1999 and 2001 Total Solar Eclipses

摘要：ATM 00-00575建议标题：1999年和2001年日全食日冕加热研究主要研究人员：威廉姆斯学院的Jay M.Pasachoff研究人员将检验所提出的通过弱压缩磁流体动力波解释日冕加热的机制。主要的工作是利用日全食期间拍摄的高时间分辨率的日冕观测来探索日冕振荡的空间和时间谱，以便区分驻波和传播波。在1999年的日食中，观测是与TRACE航天器协调进行的，后者具有较高的空间分辨率，但时间分辨率较低。还将在2001年非洲日食期间进行观测。这次日食将发生在太阳活动周期的顶峰附近，形成比平时更多、更明亮的环状结构，以供研究。研究人员还将使用他们的数据，通过研究紫外线波长下高度校准的日冕图像的比率来绘制太阳日冕的温度图。在第三个项目中，通过与SOHO航天器上的EIT和LASCO小组的安排，调查人员获得了与现已停止使用的LASCO C1日冕仪的场和通带相匹配的数据。这些数据使以前使用EIT和LASCO仪器进行的相关研究得到了重要的扩展。

Abstract: ATM 00-00575Proposal Title: Coronal Heating Studies at the 1999 and 2001 Total Solar EclipsesPrincipal Investigator: Jay M. Pasachoff, Williams College The investigators will test proposed mechanisms to explain the heating of the solar corona via weakly compressive magnetohydrodynamic waves. The main effort is to use high time resolution observations of the solar corona taken during total eclipses to explore the spatial and temporal spectra of coronal oscillations in order to distinguish standing and propagating waves. In the 1999 eclipse, observations were coordinated with the TRACE spacecraft, which has higher spatial, but lower temporal resolution. Observations will also be conducted during the 2001 eclipse in Africa. This eclipse will occur near the peak of the solar activity cycle, making more loops, and brighter loops, than usual available for study. The investigators will also use their data to map the temperature of the solar corona by studying ratios of highly calibrated CCD images of the corona at ultraviolet wavelengths. In a third project, by arrangement with the EIT and LASCO groups on the SOHO spacecraft, the investigators have obtained data to match the field and passband of the now-defunct LASCO C1 coronagraph. These data permit an important extension of the previous correlative studies using the EIT and LASCO instruments.