Global Texture as the Origin of Cosmic Structure
Aug, 198916 pages
Published in:
- Phys.Rev.Lett. 63 (1989) 2625
Report number:
- PUPT-89-1145
Citations per year
Abstract: (APS)
If a unified theory possesses non-Abelian global symmetries which are spontaneously broken it gives rise to a three-dimensional defect known as texture. In an expanding universe texture obeys a ‘‘scaling solution,’’ which produces a constant density perturbation at horizon crossing of δρ/ρ≊mGUT2/mPlanck2, where mGUT is the scale of symmetry breaking. These (isocurvature) perturbations are broadly of Harrison-Zeldovich form, but are non-Gaussian, having strong ‘‘spikes’’ in the density field. Consequences for microwave background anisotropy are briefly discussed.- unified field theory
- symmetry: nonabelian
- spontaneous symmetry breaking
- cosmological model
- energy: density
- cosmic background radiation
- microwaves: anisotropy
- numerical calculations
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