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

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

doi:10.1088/0264-9381/20/8/308

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

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

Institute of Cosmology & Gravitation

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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 language	English
Pages (from-to)	1519-1528
Number of pages	10
Journal	Classical and Quantum Gravity
Volume	20
Issue number	8
DOIs	https://doi.org/10.1088/0264-9381/20/8/308
Publication status	Published - 2003

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title = "CMB limits on large-scale magnetic fields in an inhomogeneous universe",

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",

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AU - Clarkson, C.

AU - Coley, A.

AU - Maartens, Roy

AU - Tsagas, C.

PY - 2003

Y1 - 2003

N2 - 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

AB - 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

U2 - 10.1088/0264-9381/20/8/308

DO - 10.1088/0264-9381/20/8/308

M3 - Article

SN - 0264-9381

VL - 20

SP - 1519

EP - 1528

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

IS - 8

ER -

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

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