forgot password?
register here
Research articles
  search articles
  reviews guidelines
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
Members: 3431
Articles: 2'256'574
Articles rated: 2602

25 September 2022
  » arxiv » astro-ph/0205155

 Article overview

Topology of the universe from COBE-DMR; a wavelet approach
G. Rocha ; L. Cayon ; R. Bowen ; A. Canavezes ; J. Silk ; A. J. Banday ; K. M. Gorski ;
Date 10 May 2002
Journal Mon.Not.Roy.Astron.Soc. 351 (2004) 769
Subject astro-ph
AffiliationCambridge, CAUP), L. Cayon (Santander), R. Bowen (Oxford), A. Canavezes (Cambridge, CAUP), J. Silk (Oxford), A. J. Banday (MPA) and K. M. Gorski (ESO, Warsaw
AbstractIn this paper we pursue a new technique to search for evidence of a finite Universe, making use of a spherical mexican-hat wavelet decomposition of the microwave background fluctuations. Using the information provided by the wavelet coefficients at several scales we test whether compact orientable flat topologies are consistent with the COBE-DMR data. We consider topological sizes ranging from half to twice the horizon size. A scale-scale correlation test indicates that non-trivial topologies with appropriate topological sizes are as consistent with the COBE-DMR data as an infinite universe. Among the finite models the data seems to prefer a Universe which is about the size of the horizon for all but the hypertorus and the triple-twist torus. For the latter the wavelet technique does not seem a good discriminator of scales for the range of topological sizes considered here, while a hypertorus has a preferred size which is 80% of the horizon. This analysis allows us to find a best fit topological size for each model, although cosmic variance might limit our ability to distinguish some of the topologies.
Source arXiv, astro-ph/0205155
Services Forum | Review | PDF | Favorites   
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
of broad interest:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
» my Online CV
» Free

News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2022 - Scimetrica