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; 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.

Mateo，Michiganast-9820608Drs的MariiNiversity。 Mateo和Arabadjis将执行一个观察性和理论研究计划，以识别和表征银河系中不同结构或流的详细特性。 这些流被认为是通过与银河系的相互作用而潮湿的矮星系的残余物。 观察程序依赖于PI开发的技术来识别和研究表面亮度水平极低的水流。 他们将把这项技术应用于附近的进一步研究，最近发现的SGR矮人星系，以及麦哲伦流以及其他残留的签名，这些签名在PI和其他其他人的持续搜索中已确定。 他们将通过速度研究遵循这些光度搜索。 该项目的理论部分涉及试图建模卫星星系的破坏，并使用N体和平滑的粒子流体动力学技术的组合对整个银河晕中的潮汐碎屑进行大规模分布的描述。