High Resolution Velocity Fields of Low Surface Brightness Galaxies

AST-0505956McGaugh.这是一个获取和分析大样本低表面亮度(LSB)星系的高精度、高空间分辨率二维速度场的项目。引人注目的是，LSB星系似乎以暗物质为主，这使得它们成为研究暗物质分布的极佳探测器，特别是通过模拟冷波长暗物质模型预测的陡峭的内尖点，(可以说)在观测中看不到。这种对尖点核心问题缺乏共识的情况导致了对更多更好数据的巨大需求，这项研究将提供这些数据。这项工作还将解决一些相关的问题，特别是将重子Tully-Fisher关系扩展到较低质量的星系。这项研究将有助于一个持续和广泛的推广计划，包括流行的文章和讲座，在学校举办的活动，学生主要来自代表性不足的社区，以及支持研究生和本科生，同样强调代表性不足的群体。

AST-0505956McGaughThis is a project for the acquisition and analysis of high accuracy, high spatial resolution two-dimensional velocity fields of a large sample of low surface brightness (LSB) galaxies. Strikingly, LSB galaxies appear to be dark matter dominated, making them an excellent probe of the dark matter distribution, and especially of the steep inner cusp predicted by simulations of the lambda-cold dark matter model, which is (arguably) not seen in the observations. This lack of a consensus about the cusp-core problem has created an enormous demand for more and better data, which this research will provide. The work will also address some related issues, notably extending the baryonic Tully-Fisher relation to lower mass galaxies.This research will contribute to a continuing and extensive outreach program, including popular articles and lectures, activities in schools with students predominantly from under-represented communities, and support for graduate and undergraduate students, similarly emphasizing under-represented groups.