Probing Cosmic topology using CMB anisotropy
Abstract
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.
Cite
@article{arxiv.astro-ph/9804042,
title = {Probing Cosmic topology using CMB anisotropy},
author = {Tarun Souradeep and Dmitry Pogosyan and J. Richard Bond},
journal= {arXiv preprint arXiv:astro-ph/9804042},
year = {2007}
}
Comments
4 Pages, Proc. of XXXIIIrd Recontres de Moriond "Fundamental Parameters in Cosmology", Jan. 17-24,1998, Les Arc, France