Slow decay of magnetic fields in open Friedmann universes

Details Slow decay of magnetic fields in open Friedmann universes Slow decay of magnetic fields in open Friedmann universes

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvd..77j7302b&link_type=abstract

Physical Review D, vol. 77, Issue 10, id. 107302

Astronomy and Astrophysics

Astrophysics

27

Cosmology, Electric And Magnetic Fields, Superclusters, Large-Scale Structure Of The Universe

Scientific paper

Magnetic fields in Friedmann universes can experience superadiabatic growth without departing from conventional electromagnetism. The reason is the relativistic coupling between vector fields and spacetime geometry, which slows down the decay of large-scale magnetic fields in open universes, compared to that seen in perfectly flat models. The result is a large relative gain in magnetic strength that can lead to astrophysically interesting B fields, even if our Universe is only marginally open today.

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