5 papers
Eigenmodes of Lens and Prism Spaces
Roland Lehoucq, Jean-Philippe Uzan, Jeffrey Weeks
Cosmologists are taking a renewed interest in multiconnected spherical 3-manifolds (spherical spaceforms) as possible models for the physical universe. To understand the formation…
Cosmic Strings Lens Phenomenology Revisited
Francis Bernardeau, Jean-Philippe Uzan
We present investigations of lens phenomenological properties of cosmic strings for deep galaxy surveys. General results that have obtained for lineic energy distribution are prese…
New Developments in the Search for the Topology of the Universe
Jean-Philippe Uzan, Roland Lehoucq, Jean-Pierre Luminet
Multi-connected Universe models with space idenfication scales smaller than the size of the observable universe produce topological images in the catalogs of cosmic sources. In thi…
Cosmic microwave background anisotropies seeded by coherent topological defects : a semi-analytic approach
Jean-Philippe Uzan, Nathalie Deruelle, Alain Riazuelo
We consider a perfectly homogeneous, isotropic and spatially flat universe which undergoes a sudden phase transition producing topological defects. We assume that these defects for…
Conservation Laws for Cosmological Perurbations
Nathalie Deruelle, Jean-Philippe Uzan
We briefly recall the problem of defining conserved quantities such as energy in general relativity, and the solution by introducing a symmetric background. We apply the general fo…