It is argued that large scale cosmic magnetic field could be generated in the primeval plasma slightly before hydrogen recombination. Non-zero vorticity, necessary for that, might be created by the photon diffusion in the second order in the temperature fluctuations. The resulting seed fields at galactic scale would be (8-9) orders of magnitude smaller than the observed ones and with a reasonable galactic dynamo amplifying the seed fields by the factor ∼108-109 an existence of coherent magnetic fields in galaxies may be explained.
GENERATION OF LARGE SCALE MAGNETIC FIELDS AT RECOMBINATION EPOCH
BEREJIANI, ZOURAB
Writing – Original Draft Preparation
;
2004-01-01
Abstract
It is argued that large scale cosmic magnetic field could be generated in the primeval plasma slightly before hydrogen recombination. Non-zero vorticity, necessary for that, might be created by the photon diffusion in the second order in the temperature fluctuations. The resulting seed fields at galactic scale would be (8-9) orders of magnitude smaller than the observed ones and with a reasonable galactic dynamo amplifying the seed fields by the factor ∼108-109 an existence of coherent magnetic fields in galaxies may be explained.File in questo prodotto:
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