The Bulls-Eye Effect as a Probe of the Mass Density of the Universe

AST-0070702Melott这个项目的目标是开发一种测量宇宙质量密度的新技术。在大多数当代宇宙学模型中，质量密度(称为欧米伽_m)的知识对于理解宇宙的“命运”(无论是开放的还是封闭的)都是至关重要的。目前有几种方法被用来测量这一非常重要的宇宙学参数，但所有方法的结果都略有不同。这项研究中使用的技术完全独立于其他正在使用的技术。它将基于对观测到的星系空间分布的一系列计算机模拟，每个模拟使用不同的质量密度。然后，这些模拟的结果将与斯隆数字天空调查和拉斯坎帕纳斯红移调查等新的大规模调查中测量的真实星系分布进行比较。这项新技术应该会对我们目前对宇宙及其演化的认识提供一个很好的、独立的检验。该项目的资金由NSF的星系外天文学和宇宙学计划(AST/exc)提供。*

AST-0070702MelottThis project has as its goal the development of a novel technique for measuring the mass density of the universe. Knowledge of the mass density (called Omega_m) is critical for understanding the "fate" of the universe (whether open or closed) in most contemporary cosmological models. Several methods are currently in use for measuring this very important cosmological parameter but all give slightly different results. The technique to be used in this research is completely independent of the other techniques in use. It will be based on a series of computer simulations, each using a different mass density, of the observed spatial distribution of galaxies. The results of these simulations will then be compared with the true galaxy distributions as measured in new, large-scale surveys such as the Sloan Digital Sky Survey and the Las Campanas Redshift Survey. This new technique should provide a good, independent check on our current knowledge of the universe and its evolution.Funding for this project was provided by the NSF program for ExtragalacticAstronomy & Cosmology (AST/EXC).***