The Three-Dimensional Structure of the Milky Way

银河系的三维结构

• 批准号: 9117388
• 负责人: David Spergel
• 金额: $ 15万
• 依托单位: Princeton University
• 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: 1992-02-15 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117388&HistoricalAwards=false
• 关键词: Three; Dimensional; Structure; Milky; Way

The goal of Dr. Spergel's project is to synthesize the growing body of observational data that suggests that our Galaxy, the Milky Way, has significant non-axisymmetric structure. Improvements in infrared technology have enabled astronomers to observe the galactic center at wavelengths not obscured by dust. These observations suggest that our Galaxy is barred. Radio wavelength surveys of gas motions in our Galaxy reveal significant non- circular motions that are likely due to this bar. Dr. Spergel plans to develop analytical and numerical techniques to construct a three-dimensional model of the Milky Way that is consistent with the observations. Improvements in our understanding of orbital dynamics in triaxial systems as well as improvements in numerical techniques and computer hardware will facilitate this study. Dr. Spergel also plans to study the dynamics of corrugation waves and spiral density waves excited by the bar and the galactic spheroid and to explore how these waves alter gas motions in the Galaxy. Ultimately the goal of this research is to better understand the morphology and dynamics of the Milky Way and to provide insight into its origin and evolution.

斯佩格尔博士项目的目标是综合越来越多的观测数据，这些数据表明我们的银河系具有显着的非轴对称结构。 红外技术的进步使天文学家能够以不被尘埃遮挡的波长观察银河系中心。 这些观察结果表明我们的银河系是被禁止的。 对银河系中气体运动的无线电波长调查揭示了可能由该条引起的显着的非圆形运动。 斯佩格尔博士计划开发分析和数值技术来构建与观测结果一致的银河系三维模型。 我们对三轴系统轨道动力学的理解的提高以及数值技术和计算机硬件的改进将促进这项研究。 斯佩格尔博士还计划研究由棒和银河球体激发的波纹波和螺旋密度波的动力学，并探索这些波如何改变银河系中的气体运动。 这项研究的最终目标是更好地了解银河系的形态和动力学，并深入了解其起源和演化。