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

C. Clarkson, A. Coley, Roy Maartens, C. Tsagas

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Abstract

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 × 10−9 G
Original languageEnglish
Pages (from-to)1519-1528
Number of pages10
JournalClassical and Quantum Gravity
Volume20
Issue number8
DOIs
Publication statusPublished - 2003

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