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CMB limits on large-scale magnetic fields in an inhomogeneous universe

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 نشر من قبل Chris Clarkson
 تاريخ النشر 2002
  مجال البحث فيزياء
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We use the cosmic microwave background temperature anisotropy to place limits on large-scale magnetic fields in an inhomogeneous (perturbed Friedmann) universe. If no assumptions are made about the spacetime geometry, only a weak limit can be deduced directly from the CMB. In the special case where spatial inhomogeneity is neglected to first order, the upper limit is much stronger, i.e. a few nano-G



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