Journal
PHYSICAL REVIEW D
Volume 87, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.103005
Keywords
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Funding
- Spanish Science Ministry [FPA2009-10612, FIS2012-30926, CSD2007-00042]
- NASA Office of Space Science
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A complete numerical calculation of the temperature anisotropies and the polarization of the cosmic microwave background is presented for a nonzero cross correlation of a stochastic magnetic field with the primordial curvature perturbation. Such a cross correlation results, for example, if the magnetic field is generated during inflation by coupling electrodynamics to a scalar field that is identified with the curvaton. For a nearly scale-invariant magnetic field of 1 nG it is found that the contribution due to the cross correlation dominates over that of the pure magnetic mode. A similar behavior on large scales is found for the linear matter power spectrum.
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