Collaborative Proposal: Do We Need Something Beyond Cold Dark Matter?

合作提案中的研究人员将对附近的矮星系进行测量，并将其与理论模拟进行比较，以限制宇宙中暗物质的性质。这项工作的更广泛影响包括培养研究生和博士后研究员，以及让代表性不足的群体参与科学事业。暗物质模拟的可视化将用于公众宣传。该计划旨在测量银河系矮球体卫星内恒星的化学和动力学结构，并将测量结果与模拟结果进行比较，以推断暗物质在最不明亮星系中的空间分布。他们将直接将观测结果与第一套宇宙学/流体动力学模拟进行比较，这些模拟解决了实际可观测的问题——恒星的位置、速度、金属丰度和年龄。通过模拟生成模拟观测目录，可以将暗物质和星系形成模型与严格意义上的观测数据进行比较。这个项目更广泛的影响是测试标准的冷暗物质宇宙学模型。

The investigators in the collaborative proposal will make measurements of nearby dwarf galaxies and compare them with theoretical simulations to constrain the nature of Dark Matter in the universe. Broader impacts of the work include training of graduate students and a postdoctoral researcher, and engagement of under-represented groups toward careers in science. Visualizations of dark matter simulations will be created for public outreach. The program aims to measure chemical and dynamical structure of stars within the Milky Way's dwarf spheroidal satellites and compare the measurements to simulations, in order to infer the spatial distribution of dark matter in the least luminous galaxies. They will compare observational results directly to the first suite of cosmological/ hydrodynamical simulations that resolve actual observables - stellar positions, velocities, metallicities, and ages. The generation of mock observational catalogs from simulations will allow dark matter and galaxy formation models to be compared to data strictly in terms of observables. The wider ranging impact of this project is to test the standard cold dark matter cosmological model.