Mutual dynamical evolution of the Galaxy and the nearby Local Group

银河系与邻近本星系群的相互动态演化

• 批准号: 9988146
• 负责人: Martin Weinberg
• 金额: $ 40.48万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9988146&HistoricalAwards=false
• 关键词: Mutual; dynamical; evolution; Galaxy; nearby

Drs. Martin Weinberg and Neal Katz of the University of Massachusetts will carry out two interrelated, but independent, projects aimed at understanding the structure, evolution, and interaction between the halo and luminous components of galaxies in general, but focused primarily on our galaxy, the Milky Way. The Milky Way is the ideal and possibly the only galaxy that qualifies as a subject for this study. Different evolutionary histories are likely to produce unique but subtly different responses. Tests of these multi-componentinteractions will require the photometric and kinematic detail that only our own galaxy can offer. Similarly, the simultaneous evolution of the Milky Way's companions, the Large and Small Magellanic Clouds, by the same dynamical mechanisms will further constrain inferred scenarios. The near-infrared star counts offered by the 2MASS project together with diffuse and molecular gas surveys enable a deep theory-data comparison and help plan programs for upcoming high-precision kinematic data. This project will for the first time unify these dynamical mechanisms theoretically and provide detailed observational diagnoses for their consequences. In the end, conclusions based on the study of the Milky Way and the Magellanic Clouds will have significant implications for galaxy evolution in general.

马萨诸塞州大学的马丁温伯格和尼尔卡茨博士将开展两个相互关联但独立的项目，旨在了解一般星系晕和发光成分之间的结构，演变和相互作用，但主要集中在我们的星系，银河系。 银河系是理想的，也可能是唯一有资格作为这项研究对象的星系。不同的进化历史可能会产生独特但微妙不同的反应。这些多成分相互作用的测试将需要只有我们自己的星系才能提供的光度和运动学细节。 同样，银河系的同伴，大麦哲伦云和小麦哲伦云，通过相同的动力学机制同时演化，将进一步限制推断的场景。2MASS项目提供的近红外星星计数以及扩散和分子气体调查能够进行深入的理论数据比较，并帮助规划即将到来的高精度运动学数据的计划。该项目将首次在理论上统一这些动力学机制，并对其后果提供详细的观测诊断。最后，基于对银河系和麦哲伦云的研究得出的结论将对整个星系的演化产生重大影响。