Issue |
A&A
Volume 476, Number 2, December III 2007
|
|
---|---|---|
Page(s) | 691 - 696 | |
Section | Cosmology (including clusters of galaxies) | |
DOI | https://doi.org/10.1051/0004-6361:20077656 | |
Published online | 24 September 2007 |
A new analysis of the Poincaré dodecahedral space model
1
DSM/DAPNIA/Service d'Astrophysique, CE-Saclay, 91191 Gif-sur-Yvette Cedex, France e-mail: roller@discovery.saclay.cea.fr
2
Laboratoire Univers et Théories, CNRS-UMR 8102, Observatoire de Paris, 92195 Meudon Cedex, France
3
Institut d'Astrophysique de Paris, 98bis boulevard Arago, 75014 Paris, France
4
15 Farmer Street, Canton, New York 13617-1120, USA
Received:
17
April
2007
Accepted:
5
September
2007
Context.The full three-year Wilkinson Microwave
Anisotropy Probe results (hereafter WMAP3) reinforce the absence
of large-angle correlations at scales greater than .
The Poincaré dodecahedral space model, which may naturally explain such features, thus
remains a plausible cosmological model, despite recent controversy
about whether matched circle searches would or would not push the
topology beyond the horizon.
Aims.We have used new eigenmode calculations of the dodecahedral space to predict the cosmic microwave background (CMB) temperature anisotropies in such a model, with an improved angular resolution.
Methods.We have simulated CMB maps and exhibited the expected self intersection of the last scattering surface along six pairs of circles. For a set of plausible cosmological parameters, we have derived the angular power spectrum of the CMB up to large wavenumbers.
Results.Comparison of the angular power spectrum with the WMAP3 observations leads to an optimal fit with the Poincaré dodecahedral space model, for a value of
the total energy density parameter.
Key words: cosmology: theory / cosmology: large-scale structure of Universe
© ESO, 2007
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