9 papers · 1 filter
A new analysis of Poincaré dodecahedral space model
S. Caillerie, M. Lachièze-Rey, J. -P. Luminet +3
The full three-year WMAP results (WMAP3) reinforce the absence of large-angle correlations at scales greater than 60 degrees. The Poincare dodecahedral space (PDS) model model, whi…
Constraining Cosmic Topology with CMB Polarization
Alain Riazuelo, Samuel Caillerie, Marc Lachièze-Rey +2
Multiply connected space sections of the universe on a scale smaller than the horizon size can leave an imprint on cosmic microwave background polarization maps, in such a way that…
GRBs and the 511 keV emission of the Galactic bulge
E. Parizot, M. Cassé, R. Lehoucq +1
We consider the phenomenology of the 511 keV emission in the Galactic bulge, as recently observed by INTEGRAL, and propose a model is which the positrons are produced by gamma-ray…
Well-proportioned universes suppress CMB quadrupole
Jeffrey Weeks, Jean-Pierre Luminet, Alain Riazuelo +1
A widespread myth asserts that all small universe models suppress the CMB quadrupole. In actual fact, some models suppress the quadrupole while others elevate it, according to whet…
Cosmic microwave background anisotropies in multi-connected flat spaces
Alain Riazuelo, Jeffrey Weeks, Jean-Philippe Uzan +2
This article investigates the signature of the seventeen multi-connected flat spaces in cosmic microwave background (CMB) maps. For each such space it recalls a fundamental domain…
Dodecahedral space topology as an explanation for weak wide-angle temperature correlations in the cosmic microwave background
J. -P. Luminet, J. Weeks, A. Riazuelo +2
Cosmology's standard model posits an infinite flat universe forever expanding under the pressure of dark energy. First-year data from the Wilkinson Microwave Anisotropy Probe (WMAP…