Streams in the Galactic Halo

马特奥，玛丽，密歇根大学，博士。Mateo和Arabadjis将执行一项观测和理论研究计划，以识别和描述银河系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，由于与银河系的相互作用而被潮汐破坏。观测计划依赖于PI开发的一项技术，以识别和研究极低地表亮度水平的流。他们将把这项技术应用于进一步研究附近最近发现的Sgr矮星系，麦哲伦流，以及PI和其他人正在进行的搜索中发现的其他遗迹特征。他们将在光度研究之后进行速度研究。该项目的理论部分包括尝试模拟卫星星系的破坏，并利用n体和平滑粒子流体动力学技术的结合，对整个星系晕的潮汐碎片的大规模分布进行描述。

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.