Microwave and synchrotron far infrared spectroscopy of transient molecules

瞬态分子的微波和同步加速器远红外光谱

• 批准号: RGPIN-2016-06053
• 负责人: vanWijngaarden, Jennifer
• 金额: $ 2.62万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632509
• 关键词: Microwave; synchrotron; far; infrared; spectroscopy

The molecular composition of astronomical sources, from interstellar clouds to the atmospheres of remote moons, is of great interest as it provides insights into the evolution of our Universe. For example, more than 180 molecules are known in clouds between stars including organic compounds such as alcohols, aldehydes and ketones; some of which are thought to be prebiotic building blocks. These interstellar clouds ultimately form new solar systems and their chemical composition is tracked using telescopes to detect distinct molecular fingerprints as individual molecules absorb or emit light. These unique features most often involve changes in molecular rotation and occur at microwave (MW) through far infrared (FIR) wavelengths. Detection of several new compounds in remote sources each year is used to refine models of their chemical evolution but the unambiguous identification of novel species requires laboratory-based spectra for comparison.

从星际云到遥远卫星的大气层，天文来源的分子组成非常有趣，因为它提供了对我们宇宙演化的见解。例如，在恒星之间的云层中已知有180多种分子，包括醇、醛和酮等有机化合物;其中一些被认为是益生元的组成部分。这些星际云最终形成了新的太阳系，它们的化学成分被望远镜跟踪，以检测单个分子吸收或发射光时的不同分子指纹。这些独特的特征通常涉及分子旋转的变化，并发生在微波（MW）到远红外（FIR）波长。每年在远程来源中检测到几种新化合物，用于改进其化学演化模型，但明确识别新物种需要基于实验室的光谱进行比较。