Superadiabatic-type magnetic amplification in conventional cosmology

Journal Article · Wed Jun 15 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.123506· OSTI ID:20709521

Tsagas, Christos G ^[1]; Kandus, Alejandra ^[2]

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1. DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)
2. LATO-DCET, Universidade Estadual de Santa Cruz, Rodovia Ilheus-Itabuna km 16 s/n, Salobrinho CEP-05508-900, Ilheus - BA (Brazil)

We consider the evolution of cosmological magnetic fields in Friedmann-Robertson-Walker models and outline a geometrical mechanism for their superadiabatic amplification on large scales. The mechanism operates within standard electromagnetic theory and applies to Friedmann-Robertson-Walker universes with open spatial sections. We discuss the general relativistic nature of the effect and show how it modifies the adiabatic magnetic evolution. Assuming a universe that is only marginally open today, we estimate the main features of the superadiabatically amplified residual field.

• OSTI ID: 20709521
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLIFICATION
COSMOLOGY
EVOLUTION
GENERAL RELATIVITY THEORY
GEOMETRY
MAGNETIC FIELDS
RELATIVISTIC RANGE
STANDARDS
UNIVERSE