U.S.-Australia Cooperative Research on Carbon Isotopes in Comets

美澳彗星碳同位素合作研究

• 批准号: 9114648
• 负责人: Peter Wehinger
• 金额: $ 0.9万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-01 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9114648&HistoricalAwards=false
• 关键词: U.S.; Australia; Cooperative; Research; Carbon

One of the U.S. PIs, Peter A. Wehinger, Susan Wyckoff, and their graduate student, Marvin Kleine, will visit their Australian counterpart, Dr. Bruce A. Peterson of the Australian National University, once in each of three years. The goals of this research are to determine the carbon isotope abundance ratio in a sample of bright comets, and to determine the 12C/13C abundance ratio in the local interstellar medium by observing absorption lines of molecules and molecular ions (CN, CH, and CH+) in the lines-of-sight of bright 0- and B-type stars. Also proposed is the development of a full fluorescence model for CN to improve the accuracy with which we can determine the carbon and nitrogen isotope ratios in comets. The researchers will use the Mount Stromolo Observatory's 1.9 meter telescope located near Canberra, Australia, with its coude-echelle spectrograph and photo-counting array. In the Northern Hemisphere, the investigators will use the Kitt Peak National Observatory coude-feed telescope and echelle spectrograph. The research, which is essentially a continuation of a successful collaborative effort begun with Comet Halley in 1986 with U.S.-Australia Cooperative Science Program support, is important because of what it may reveal about the formation of the early universe. Additional financial support for the domestic U.S. research comes from NASA and NSF grants.

美国的一名私家侦探彼得·A·Wehinger，Susan 维科夫和他们的研究生马文 克莱恩，将访问他们的澳大利亚 同行布鲁斯A.彼得森的 澳大利亚国立大学，每一次 三年 本研究的目的是 确定碳同位素丰度比 明亮彗星的样本，并确定 12 C/13 C丰度比 星际介质吸收观测 分子和分子离子（CN，CH， 和CH+）在明亮的0-和 B型恒星 还建议制定一项全面的 CN的荧光模型，以改善 我们可以精确地测定 以及彗星中的氮同位素比率。 的 研究人员将利用斯特罗莫洛火山 天文台的1.9米望远镜位于 澳大利亚的堪培拉，其coude-echelle 光谱仪和光计数阵列。 在 北方半球，研究人员将使用 基特峰国家天文台 望远镜和阶梯光栅摄谱仪。 这项研究基本上是一项 继续成功的合作 1986年，哈雷彗星开始了这一努力， 美国--澳大利亚合作科学计划 支持，是重要的，因为它可能 揭示了早期 宇宙 对联合国的额外财政支助 美国国内的研究来自NASA和NSF 赠款。