Radio Astronomical Studies of the Diffuse Interstellar Medium

弥漫星际介质的射电天文学研究

• 批准号: 9123362
• 负责人: Carl Heiles
• 金额: $ 28.5万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-04-01 至 1996-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123362&HistoricalAwards=false
• 关键词: Radio; Astronomical; Studies; Diffuse; Interstellar

Dr. Carl Heiles will continue his wide ranging investigations of the diffuse interstellar medium primarily using radio astronomical techniques. He will continue extensive observations of Zeeman splitting of the 21-cm neutral hydrogen line, concentrating on extensive maps of interesting regions; attempt the measurement of linear polarization of the 18-cm lines of hydroxyl; study the morphology and kinematics of large interstellar shells and supershells by detailed mapping of the 21-cm line and diffuse radio recombination lines; investigate the fundamental topology of the neutral interstellar medium by intensive analysis of existing data; perform a blind search for anomalous velocity features, such as may be due to rapidly expanding shells; investigate the global properties of the diffuse radio recombination line emission and the Warm Ionized Medium by performing a large survey in the Galactic plane; perform a comprehensive and detailed investigation of globules in ionized hydrogen regions by using both molecular and optical emission lines; confirm a possible detection of the 327 MHz line of deuterium; and launch a search for the 310 MHz lines of deuterated hydroxyl.

卡尔·海尔斯博士将继续他的广泛调查， 主要利用射电天文学 技术. 他将继续对塞曼进行广泛观察 分裂的21厘米中性氢线，集中在 感兴趣的地区的广泛地图;尝试测量 羟基的18厘米线的线性偏振;研究 大型星际壳层的形态学和运动学， 超壳层的21厘米线和漫射射电的详细测绘 重组线;调查的基本拓扑结构的 通过对现有数据的深入分析，确定中性星际介质; 执行对异常速度特征的盲搜索，诸如可以 由于快速膨胀的外壳;调查全球 扩散射电复合线发射的性质和 温暖的电离介质通过在银河系进行大规模调查 飞机;进行全面和详细的调查 在电离氢区的球状体， 光学发射谱线;确认可能检测到327 MHz 氘线;并启动对310兆赫线的搜索 氘代羟基