US-France Cooperative Research: Multi-Wavelength Observations and Detailed Models of Cyanopolyyne Molecules in Astrophysical Environments

这个为期三年的美法天体化学合作研究项目研究了在各种宇宙环境中发现的丰富而普遍存在的聚氰乙烯分子家族。这些线状分子发出强烈而众多的无线电信号。此外，它们的振动可以在光谱的温暖区域被探测到，这使它们成为恒星形成的云核、原行星盘和垂死恒星气体流出的绝佳探测器。美国加州大学洛杉矶分校的马克·莫里斯和法国格勒诺布尔第一大学的劳伦特·维森菲尔德将研究分子家族聚氰乙烯的天体物理学价值。他们将首先计算碰撞概率，建立一个氰聚炔线发射模型，然后在欧洲和美国的无线电和红外设备上观察这些分子。该项目利用了美国和法国研究人员的互补专业知识，并提供了位于西班牙格拉纳达的单盘毫米望远镜IRAM。一名美国研究生将参与理论计算和观察。国家科学基金会（NSF）和国家科学研究中心（CNRS）支持这个联合项目。NSF为美国研究者和他的学生访问法国和西班牙提供资金。法国国家科学研究中心将支付法国调查人员访问美国和西班牙的费用。

0340750MorrisThis three-year U.S.-France cooperative research project in astrochemistry addresses the abundant and ubiquitous cyanopolyyne family of molecules, which are found in a variety of cosmic environments. These linear molecules emit strong and numerous radio signals. Furthermore, their vibrations can be detected in warm regions of the spectrum, which renders them excellent probes of star-forming cloud cores, protoplanetary disks, and of gas outflows from dying stars. The U.S. investigator, Mark Morris of the University of California at Los Angeles, and the French investigator, Laurent Wiesenfeld of the Universite de Grenoble I, will investigate the astrophysical value of the molecule family cyanopolyynes. They will first calculate collision probabilities to construct a model of cyanopolyyne line emissions, then, observe these molecules at radio and infrared facilities in Europe and in the U.S. The project takes advantage of complementary expertise of the U.S. and French investigators and provides access to a single-dish millimeter telescope, IRAM, located in Granada, Spain. An American graduate student will participate in the theoretical calculations and observations. The National Science Foundation (NSF) and the Centre National de la Recherche Scientifique (CNRS) support this joint project. NSF provides funding for visits to France and to Spain by the U.S. investigator and his student. The CNRS will cover the expenses of visits to the United States and Spain by the French investigator.