Estimate of a non-helical electroweak primordial bootstrap field today
  We estimate the magnitude today of the primordial magnetic field originating
at the electroweak phase transition. We find that the field, which at the
electroweak phase transition is originally of order $10^{23}-10^{24}$ G
correlated over the Hubble scale, today is of order $10^{-14}$ G at a scale of
order 2 kpc. This result is consistent with the lower limit on the strength of
intergalactic magnetic fields obtained by Neronov and Vovk from observations of
TeV blazars. The field is non-helical. We compare our results with the helical
case discussed by Field and Carroll.
