Author/Authors :
Clarkson، C A نويسنده , , Coley، A A نويسنده , , Maartens، R نويسنده , , Tsagas، C G نويسنده ,
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.
Keywords :
(alpha)Carbon , Cycloalkyl Halides , Nitroalkanes , Carbanions , Sulfur Nucleophiles , Oxygen , Phosphorus Nucleophiles , Nitrobenzyl , sp2 Carbons , Cumyl , Radicals Intermediates , Trihalides , Photostimulated Reactions , Geminal Dihalides , Regiochemistry , Alicyclic Aliphatic Substrates , stereochemistry , Triorganylstannyl , Aliphatic Substrates , Carbonylation , EWG , Neopentyl , sp3 Carbons , Heterocyclic Analogues , Nitrogen Nucleophiles
