Do intergalactic magnetic fields imply an open universe?
arXiv:1210.1183 · doi:10.1103/PhysRevD.86.107302
Abstract
The detection of magnetic fields at high redshifts, and in empty intergalactic space, support the idea that cosmic magnetism has a primordial origin. Assuming that Maxwellian electromagnetism and general relativity hold, and without introducing any `new' physics, we show how the observed magnetic fields can easily survive cosmological evolution from the inflationary era in a marginally open Friedmann universe but fail to do so, by a very wide margin, in a flat or a marginally closed universe. Magnetic fields evolve very differently in open and closed Friedmann models. The existence of significant magnetic fields in the universe today, that require primordial seeding, may therefore provide strong evidence that the universe is marginally open rather than marginally closed.
Minor changes, published version
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Cited by in corpus (11)
- Gravito-electromagnetic analogies
- Cosmological Magnetogenesis From Extra-dimensional Gauss Bonnet Gravity
- Dynamics of astrophysical objects against the cosmological background
- Conservation laws and evolution schemes in geodesic, hydrodynamic and magnetohydrodynamic flows
- Cosmic magnetization in curved and Lorentz violating space-times
- Completing magnetic field generation from gravitationally coupled electrodynamics with the curvaton mechanism
- A Holographic Bound on Cosmic Magnetic Fields
- Can a marginally open universe amplify magnetic fields?
- Holography of Little Inflation
- Spatially open Friedmann--Robertson--Walker Universe fueled with interacting sources
- Thermal enhancement of inflationary magnetic fields