Collaborative Research: Structure formation on small scales and the natue of dark matter

新墨西哥州州立大学的Anatoly Klypin博士将与位于圣克鲁斯的加州大学的Joel Primack博士（0607712）和位于欧文的加州大学的Manoj Kaplinghat博士（0607746）开展一个合作项目，使用高分辨率的N体模拟来比较暗物质晕的密度分布和卫星丰度计数的两个最佳-来自超对称的暗物质的动机类别：冷暗物质（CDM）和非热暖暗物质（ntWDM）。模型预测，这两个类有相同的大尺度结构，但开始不同的百万秒（~ 10 E22米）或更小的尺度。该团队将对热和非热WDM晕的密度分布进行预测，并确定这些WDM晕中必须存在的相空间限制核心的大小和重要性。他们将研究高红移下的结构形成，并调查WDM和CDM模型中早期再电离的前景。拟议工作的结果对于用未来数据测试CDM范式至关重要，它们将被公开。广泛的教育目标包括通过加州大学欧文分校的两个项目培养学生对物理学的兴趣：物理路演，将物理演示带到附近的小学，以及COSMOS，介绍高度积极的高中生研究天文学和天体物理学。

Dr. Anatoly Klypin at New Mexico State University will undertake a collaborative project, with Dr. Joel Primack at the University of California, Santa Cruz (0607712) and Dr. Manoj Kaplinghat, at the University of California, Irvine (0607746), to use high-resolution N-body simulations to compare density profiles of dark matter halo and satellite abundance counts for the two best-motivated classes of dark matter from super-symmetry: Cold Dark Matter (CDM) and non-thermal Warm Dark Matter (ntWDM). Models predict that these two classes have identical large-scale structure but begin to differ on scales of million-par-second (~10E22 meter) or smaller. The team will make predictions for the density profiles of thermal and non-thermal WDM halos and determine the size and importance of the phase-space limited cores that must exist in these WDM halos. They will study structure formation at high redshifts and investigate the prospects for early reionization in WDM and CDM models.The results of the proposed work will be critical for testing the CDM paradigm with future data, and they will be made public. The broad education goals include fostering interest in physics among students through two programs at University of California, Irvine: Physics Roadshow, which takes physics demonstrations to elementary schools in the neighborhood, and COSMOS, which introduces highly motivated high school students to research in astronomy and astrophysics.