基于星系相对速度证据推断低密度宇宙
天体物理学
2009-10-31 v2
摘要
星系的运动可用于约束宇宙密度参数 Omega 及其在大尺度上的物质聚类振幅。来自 Mark III 调查估计的星系对平均相对速度表明 Omega=0.35+0.35/-0.25。若星系在大尺度上无偏聚类，Omega=0.35±0.15，以至于无偏的 Einstein-de Sitter 模型（Omega=1）与数据不符。
引用
@article{arxiv.astro-ph/0001041,
title = {Evidence for a low-density Universe from the relative velocities of galaxies},
author = {R. Juszkiewicz and P. G. Ferreira and H. A. Feldman and A. H. Jaffe and M. Davis},
journal= {arXiv preprint arXiv:astro-ph/0001041},
year = {2009}
}
备注
12 pages, 2 figures, to appear in the Jan.7 issue of ``Science''; In the original version, the title appeared twice. This problem has now been corrected. No other changes were made