U.S.-France Cooperative Research: Interstellar Clouds and Circumstellar Matter

该奖项将支持天文学的合作研究 阿尔弗雷德·格拉斯戈尔德博士和W. D. Langer和P. J. 哈金斯，纽约大学和A。O.奥蒙特研究所 法国巴黎的天体物理学。 调查人员提出了一个 联合计划，调查星际云和环境， 这将集中在三个方面： 化学、物理性质的多频研究 星际云和行星状星云。 该项目的第一部分旨在阐明物理和 附近星际云的动力学性质， 美国射电望远镜的补充观测 和法国 第二部分涉及进一步的重大发展 的光化学模型的拱星信封， 质量损失率很大的红巨星 的最后一部分 程序涉及的分子组成的观察， 行星状星云，主要是IRAM 30毫米波 望远镜 其目的是阐明进化 行星状星云的性质，特别是它们之间的联系 有着红巨星的外壳和电离的 星云。 法国-德国IRAM望远镜的使用将使 现有的拱星包层观测，包括 行星状星云，无法用仪器获得 现在在美国可用。 该项目将受益于 美国和法国的广泛和互补的专业知识 星际云领域的研究人员， 星周物质 这项研究的结果是 预计将大大促进对 恒星晚期的几个重要方面 进化

This award will support collaborative research in astronomy between Drs. Alfred Glassgold, W. D. Langer and P. J. Huggins, New York University and Dr. A. O. Omont, Institute for Astrophysics, Paris, France. The investigators propose a joint program to investigate interstellar clouds and circumst- ellar matter, which will focus in three areas: circumsteller chemistry, multifrequency studies of the physical properties of interstellar clouds, and planetary nebulae. Part one of the project seeks to elucidate the physical and dynamical properties of nearby interstellar clouds by complementary observations with radio telescopes in the US and France. Part two involves further significant development of the photochemical model for the circumstellar envelopes of red giants with large mass-loss rates. The last part of the program deals with observations of the molecular component of planetary nebulae, mainly with the IRAM 30 millimeter wave telescope. The objective is to elucidate the evolutionary properties of planetary nebulae, particularly their connection with red giant envelopes and the structure of ionized nebulae. The use of the French-German IRAM telescope will make available observations of circumstellar envelopes, including planetary nebulae, that cannot be obtained with instrumentation now available in the US. The project will benefit from the extensive and complementary expertise of the US and French investigators in the areas of interstellar clouds and circumstellar matter. The results of this research are expected to advance significantly the understanding of several important aspects of the late stages of stellar evolution.