1998/04/04 by Tarun Souradeep, Souradeep, Tarun, Dmitry Pogosyan +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9804042
4 Pages, Proc. of XXXIIIrd Recontres de Moriond "Fundamental Parameters in Cosmology", Jan. 17-24,1998, Les Arc, France
arxiv created 1998/04/04 · arxiv updated 2009/12/01
The measurements of CMB anisotropy have opened up a window for probing the global topology of the universe on length scales comparable to and beyond the Hubble radius. We have developed a new method for calculating the CMB anisotropy in models with nontrivial topology and apply it to open universe models with compact spatial topology. We conduct a Bayesian probability analysis for a selection of models which confronts the theoretical pixel-pixel temperature correlation function with the COBE-DMR data. Our results demonstrate that strong constraints on compactness arise: if the universe is small compared to the `horizon' size, correlations appear in the maps that are irreconcilable with the observations.