Collaborative research: Structure formation on small scales and the nature of dark matter

加州大学圣克鲁兹分校的Joel Primack博士将与加州大学欧文分校的Manoj Kaplinghat博士（0607746）和新墨西哥州立大学的Anatoly Klypin博士（0607752）合作开展一个项目，使用高分辨率n体模拟来比较暗物质晕和卫星丰度的密度分布，这是超对称中两种最受激励的暗物质：冷暗物质（CDM）和非热暖暗物质（ntWDM）。模型预测，这两类具有相同的大尺度结构，但在百万帕秒（~10E22米）或更小的尺度上开始出现差异。该团队将对热和非热波波分复用光晕的密度分布进行预测，并确定这些波分复用光晕中必须存在的相空间有限核心的大小和重要性。他们将研究高红移的结构形成，并研究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的数据测试清洁发展机制范式至关重要，这些结果将被公开。广泛的教育目标包括通过加州大学欧文分校（University of California, Irvine）的两个项目培养学生对物理的兴趣：物理路演（physics Roadshow），将物理演示带到附近的小学，以及COSMOS，向高度积极的高中生介绍天文学和天体物理学的研究。

Dr. Joel Primack at the University of California, Santa Cruz, will undertake a collaborative project, with Dr. Manoj Kaplinghat, at the University of California, Irvine, (0607746) and Dr. Anatoly Klypin at New Mexico State University (0607752), 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.