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·海尔斯博士将继续主要利用射电天文技术对弥漫星际介质进行广泛的研究。 他将继续对 21 厘米中性氢线的塞曼分裂进行广泛观察，重点关注感兴趣区域的广泛地图；尝试测量 18 厘米羟基线的线性偏振；通过详细绘制 21 厘米线和漫射射电重组线，研究大型星际贝壳和超级贝壳的形态和运动学；通过对现有数据的深入分析，研究中性星际介质的基本拓扑结构； 对异常速度特征进行盲目搜索，例如可能是由于快速膨胀的炮弹造成的；通过在银河平面上进行大型调查，研究漫射射电复合线发射和暖电离介质的整体特性；通过使用分子和光学发射线对电离氢区域中的小球进行全面而详细的研究；确认可能检测到 327 MHz 氘线；并开始搜索氘化羟基的 310 MHz 谱线。