标题： 一个小小的世界而已？ 显示英文标题

标题： A small universe after all?

摘要： 宇宙微波背景辐射使我们能够测量宇宙的几何结构和拓扑结构。 有人认为，COBE-DMR的数据已经排除了在小于粒子视界尺度上多重连通的模型。 在这里我们表明相反的情况是正确的：紧凑（小）的双曲宇宙比无限的对应模型更受青睐。 对于密度参数Omega_o=0.3，紧凑模型对COBE-DMR（相对似然约20）和大尺度结构数据（sigma_8增加约25%）的拟合更好。 显示英文摘要

摘要： The cosmic microwave background radiation allows us to measure both the geometry and topology of the universe. It has been argued that the COBE-DMR data already rule out models that are multiply connected on scales smaller than the particle horizon. Here we show the opposite is true: compact (small) hyperbolic universes are favoured over their infinite counterparts. For a density parameter of Omega_o=0.3, the compact models are a better fit to COBE-DMR (relative likelihood ~20) and the large-scale structure data (sigma_8 increases by ~25%).