Extending the WMAP Bound on the Size of the Universe

Details Extending the WMAP Bound on the Size of the Universe Extending the WMAP Bound on the Size of the Universe

2006-04-28

arxiv.org/abs/astro-ph/0604616v1

Phys.Rev.D75:084034,2007

Astronomy and Astrophysics

Astrophysics

9 pages, 16 figures

Scientific paper

10.1103/PhysRevD.75.084034

Clues to the shape of our Universe can be found by searching the CMB for matching circles of temperature patterns. A full sky search of the CMB, mapped extremely accurately by NASA's WMAP satellite, returned no detection of such matching circles and placed a lower bound on the size of the Universe at 24 Gpc. This lower bound can be extended by optimally filtering the WMAP power spectrum. More stringent bounds can be placed on specific candidate topologies by using a a combination statistic. We use optimal filtering and the combination statistic to rule out the infamous "soccer ball universe'' model.

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