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The first magnetic fields

Widrow, L. M., D. Ryu, D. R. G. Schleicher, K. Subramanian, C. G. Tsagas, and R. A. Treumann (2011), The first magnetic fields, Space Science Reviews, 158, 34 Journal pages, doi:10.1007/s11214-011-9833-5.

We review current ideas on the origin of galactic and extragalactic magnetic
fields. We begin by summarizing observations of magnetic fields at cosmological redshifts
and on cosmological scales. These observations translate into constraints on the strength and
scale magnetic fields must have during the early stages of galaxy formation in order to seed
the galactic dynamo. We examine mechanisms for the generation of magnetic fields that
operate prior during inflation and during subsequent phase transitions such as electroweak
symmetry breaking and the quark–hadron phase transition. The implications of strong primordial
magnetic fields for the reionization epoch as well as the first generation of stars is
discussed in detail. The exotic, early-Universe mechanisms are contrasted with astrophysical
processes that generate fields after recombination. For example, a Biermann-type battery can operate in a proto-galaxy during the early stages of structure formation. Moreover, magnetic
fields in either an early generation of stars or active galactic nuclei can be dispersed
into the intergalactic medium.
  author = {L. M. Widrow and D. Ryu and D. R. G. Schleicher and K. Subramanian and C. G. Tsagas and R. A. Treumann},
  journal = {Space Science Reviews},
  pages = {34 Journal pages},
  title = {{The first magnetic fields}},
  volume = {158},
  year = {2011},
  doi = {10.1007/s11214-011-9833-5},
%0 Journal Article
%A Widrow, L. M.
%A Ryu, D.
%A Schleicher, D. R. G.
%A Subramanian, K.
%A Tsagas, C. G.
%A Treumann, R. A.
%D 2011
%V 158
%J Space Science Reviews
%P 34 Journal pages
%T The first magnetic fields
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