Collaborative Research: Voids and Void Galaxies

vogeleyast -0071201与普林斯顿大学岑仁跃合作研究项目（AST0071153）。这项研究的目标是建立详细的模型（使用自适应网格细化代码，允许比以前的模型更精细的空间分辨率）的空洞及其组成星系，并将这些模型与斯隆数字巡天（SDSS）的数据进行比较。然后，这些比较将用于对不同的宇宙学模型、空洞的结构和动力学设置约束，并研究星系如何在低密度环境中形成和演化。研究人员建议研究宇宙中密度最低的区域（称为空洞）。空洞在宇宙大尺度结构的演化和星系的形成中起着至关重要的作用，然而人们对它们的了解和研究却很少。研究人员将对空洞形成进行理论计算机建模，并将这些模型与斯隆数字巡天获得的星系密度和空间分布的观测结果进行比较，从而对这些模型进行测试。由于这些计算机模型每个都依赖于不同类型宇宙学的不同输入参数，比较将有助于确定哪种宇宙学模型是正确的。本项目由美国国家科学基金会星系外天文学和宇宙学项目（AST/EXC）资助

ABSTRACTVogeleyAST-0071201This is a collaborative research project with Renyue Cen at Princeton University (AST0071153). The goal of this research is to construct detailed models (using an Adaptive Mesh Refinement code which allows for finer spatial resolution than previous models) of voids and their constituent galaxies and compare these models with data from the Sloan Digital Sky Survey (SDSS). These comparisons will then be used to set constraints on different cosmological models, the structure and dynamics of voids, and to investigate how galaxies form and evolve in a low density environment. The investigators propose to study the lowest density regions of the universe (called Voids). Voids play a critical role in the evolution of large scale structure and galaxy formation in the universe, yet they are poorly understood and poorly studied.The proposors will conduct theoretical computer modeling of void formation and test these models by comparing them with observations of galaxy densities and spatial distributions obtained from the Sloan Digital Sky Survey. Since these computer models will each depend on input parameters which are different for different types of cosmology, the comparison will help identify which cosmological models are correct. Funding for this project was provided by the NSF program for Extragalactic Astronomy & Cosmology (AST/EXC).***