No topological signal detected in WMAP data

[Andrzej Marecki]

Paper: astro-ph/0310233
From: Neil J. Cornish <cornish w physics.montana.edu>
Date: Wed, 8 Oct 2003 20:27:22 GMT   (16kb)

Title: Constraining the Topology of the Universe
Authors: Neil J. Cornish, David N. Spergel, Glenn D. Starkman and Eiichiro
  Komatsu
Comments: Submitted to PRL
\\
  The first year data from the Wilkinson Microwave Anisotropy Probe are used to
place stringent constraints on the topology of the Universe. We search for
pairs of circles on the sky with similar temperature patterns along each
circle. We restrict the search to back-to-back circle pairs, and to nearly
back-to-back circle pairs, as this covers the majority of the topologies that
one might hope to detect in a nearly flat universe. We do not find any matched
circles with radius greater than 25 degrees. For a wide class of models, the
non-detection rules out the possibility that we live in a universe with
topology scale smaller than 24 Gpc.
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