Streams in the Galactic Halo

银河晕中的溪流

• 批准号: 9820608
• 负责人: Mario Mateo
• 金额: $ 32.28万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9820608&HistoricalAwards=false
• 关键词: Streams; Galactic; Halo

Mateo, MarioUniversity of MichiganAST-9820608Drs. Mateo and Arabadjis will carry out an observational and theoretical research program to identify and characterize the detailed properties of distinct structures, or streams, in the galactic halo. These streams are thought to be the remnants of dwarf galaxies that have been tidally disrupted through interactions with the Milky Way galaxy. The observational program relies on a technique developed by the PI to identify and study streams at extremely low surface brightness levels. They will apply this technique to further study of the nearby, recently discovered Sgr dwarf galaxy, and to the Magellanic Stream, as well as other remnant signatures that are identified in ongoing searches by the PI and others. They will follow these photometric searches with velocity studies. The theoretical portion of the project involves attempts to model the disruption of the satellite galaxies, and to produce a description of the large-scale distribution of tidal debris throughout the galactic halo using a combination of N-body and smoothed particle hydrodynamics techniques.

马特奥，马里奥密歇根大学AST-9820608博士。马特奥和阿拉巴吉斯将开展一项观测和理论研究计划，以识别和表征银河晕中不同结构或流的详细特性。 这些流被认为是矮星系的残余物，这些星系通过与银河系的相互作用而被潮汐破坏。 该观测计划依赖于 PI 开发的技术来识别和研究极低表面亮度水平的流。 他们将应用这项技术进一步研究附近最近发现的人马座矮星系、麦哲伦流，以及 PI 和其他人在持续搜索中发现的其他残留特征。 他们将通过速度研究来跟踪这些光度搜索。 该项目的理论部分涉及尝试对卫星星系的破坏进行建模，并结合 N 体和平滑粒子流体动力学技术来描述整个星系晕中潮汐碎片的大规模分布。