Radial Population Trends in Early-Type Galaxies

这个项目将执行一个全面的计划来测量早期型星系中恒星群的平均年龄和化学成分的径向趋势。这些梯度与先前确定的年龄和金属丰度相结合，将为当代早期星系的恒星形成历史提供一个基本的观测数据库。这些信息可以与快速发展的星系演化数值模型进行比较，因此该计划将对宇宙结构的演化具有广泛的意义。研究小组将在夏季与早期职业的本科生密切合作，并且大型恒星光谱数据库将广泛分布于人口合成工作中。它应该对更广泛的社区产生重大影响，并作为一种教育工具发挥有用的作用。

AST-0406443RoseThis project will carry out a comprehensive program to measure radial trends in the mean age and chemical composition of the stellar populations in early-type galaxies. These gradients, combined with previously determined ages and metallicities, will supply a fundamental observational database for the star formation histories of present-epoch early-type galaxies. This information can then be compared with rapidly developing numerical models for the evolution of galaxies, so that this program will have broad implications for the evolution of structure in the universeThe research team will be working intensively with early career undergraduate students during the summers, and the large database of stellar spectra will be widely distributed for use in population synthesis work. It should have a significant impact on the broader community, and serve a useful function as an educational tool.