The Structure of the Universe Beyond 100 Mpc

这项研究将解决与星系大尺度分布有关的几个主要问题，特别是通过测量星系分布在非常大尺度上的波动谱，这与宇宙微波背景波动的测量重叠。几年前引入的一种很有前途的技术已经变成了一种实用的工具，它为功率谱的每个单独模式提供了数据的最佳加权，到目前为止，它已经成功地为宇宙学参数提供了非常严格的约束。目前的项目甚至可以探测到重子碰撞的存在，从而可以测量角直径距离关系，并约束暗能量的状态方程。这项研究将提高SkyServer的效率，这是一个经常被高中和公众使用的网站，并将进一步促进与动手宇宙计划的合作，学生可以在那里进行后续观察，或查找在观察中看到的有趣事物的属性。

AST-0407308SzalayThis research will address several major questions related to the large-scale distribution of galaxies, in particular by measuring the fluctuation spectrum of the galaxy distribution on very large scales, which overlap with measurements of the Cosmic Microwave Background fluctuations. A promising technique introduced a few years ago has been turned into a practical tool, which provides optimal weighting of the data for each individual mode of the power spectrum, and has so far successfully provided very tight constraints on cosmological parameters. The current project may even detect the existence of baryon bumps, which enable measurement of the angular diameter distance relation, and constrain the equation of state of the dark energy. This study will enhance the effectiveness of the SkyServer, a web site constantly in use by high schools and the general public, and will further promote collaboration with the Hands-On Universe project, where students can do follow-up observations, or look up properties of something interesting seen in an observation.