Eclipse Observations with the Caltech Submillimeter Observatory

加州理工学院亚毫米天文台的日食观测

• 批准号: 9015139
• 负责人: Harold Zirin
• 金额: $ 2.63万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9015139&HistoricalAwards=false
• 关键词: Eclipse; Observations; Caltech; Submillimeter; Observatory

Measurement at radio wavelengths is one of the only ways of studying the solar atmosphere from the ground. This research will observe limb brightening, the chromosphere and corona at the eclipse of July 1991 with the Caltech Submillimeter Observatory. These measurements will determine the size of the Sun as observed at a wavelength of 1 millimeter, the sources of thermal emission in the submillimeter range, and there will be a search for a variety of spectral features in both the chromosphere and the corona. These measurements will allow one to determine the temperature structure of the low solar atmosphere and will show temperature differences between different regions on the Sun such as filaments and sunspots. Spectral features such as recombination lines, if found, should give information on the velocity of matter in the corona and the chromosphere. Some information on chemical abundances in these regions should also be obtained. The Principal Investigator is an expert in observational solar physics and instrumentation.

无线电波长测量是从地面研究太阳大气的唯一方法之一。这项研究将利用加州理工大学的亚毫米天文台观测1991年7月日食时的日冕、色球和日冕。这些测量将确定在1毫米波长下观测到的太阳的大小，亚毫米范围内的热发射来源，并将搜索色球和日冕中的各种光谱特征。这些测量将使人们能够确定低太阳大气的温度结构，并将显示太阳上不同区域之间的温度差异，如暗条和太阳黑子。光谱特征，如复合线，如果被发现，应该能提供有关日冕和色球中物质速度的信息。还应获得有关这些区域化学丰度的一些信息。首席研究员是观测太阳物理和仪器方面的专家。