278 citations · 599 across the 9 of their papers we have counts for
5 papers · 1 filter
Topology of the universe from COBE-DMR; a wavelet approach
G. Rocha, L. Cayon, R. Bowen +4
In 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 fluctua…
How the Universe got its Spots
Janna Levin, Evan Scannapieco, Giancarlo de Gasperis +2
The universe displays a three-dimensional pattern of hot and cold spots in the radiation remnant from the big bang. The global geometry of the universe can be revealed in the spati…
Is The Universe Infinite Or Is It Just Really Big?
Janna Levin, Evan Scannapieco, Joseph Silk
The global geometry of the universe is in principle as observable an attribute as local curvature. Previous studies have established that if the universe is wrapped into a flat hyp…
Flat Spots: topological signatures of an open universe in COBE sky maps
Janna J. Levin, John D. Barrow, Emory F. Bunn +1
We investigate the behaviour of light rays in an open universe with a partly periodic horn topology. The geodesics can be solved exactly and the periodic topology creates character…
How Anisotropic is our Universe?
Emory. F. Bunn, Pedro Ferreira, Joseph Silk
Large-scale cosmic microwave background anisotropies in homogeneous, globally anisotropic cosmologies are investigated. We perform a statistical analysis in which the four-year dat…