Theoretical Studies of Interstellar Matter

星际物质的理论研究

• 批准号: 9531790
• 负责人: Alexander Dalgarno
• 金额: $ 17.2万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9531790&HistoricalAwards=false
• 关键词: Theoretical; Studies; Interstellar; Matter

9531790 Dalgarno Dr. Dalgarno will direct theoretical studies of X-ray dominated regions of space with the intent of identifying specific diagnostic probes that may distinguish between regions ionized by X-rays and by cosmic rays. The infrared response of molecular hydrogen as a function of density will be calculated. The chemistry of deuterated molecular species in the early Universe will be explored. The molecular composition of circumstellar shells will be examined using a refined treatment of radiative transfer. Particular attention will be given to the discrepancy between the present model abundance and the measured abundance of neutral carbon atoms in IRC+10216. Semiclassical calculations of rate coefficients of rovibrational transitions of molecular hydrogen in collision with H will be completed and quantal calculations required for low temperatures will be initiated. Charge transfer collisions of singly charged species interacting with neutral atoms will be studied. ***

9531790 Dalgarno Dalgarno博士将指导X射线主导空间区域的理论研究，目的是识别可能区分X射线和宇宙射线电离区域的特定诊断探针。 将计算分子氢与密度函数的红外响应。 将探索早期宇宙中氘化分子物种的化学。 将使用辐射转移的精制处理来检查壳壳的分子组成。 特别注意当前模型丰度与IRC+10216中中性碳原子的丰度之间的差异。 将完成与H碰撞中分子氢的旋转型转变的速率系数的半经典计算，并将启动低温所需的定量计算。 将研究与中性原子相互作用的单一电荷物种的电荷转移碰撞。 ***