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Microwave Background Signatures of a Primordial Stochastic Magnetic Field

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arxiv astro-ph/0105504 v2 pith:4LTVTCL7 submitted 2001-05-29 astro-ph

Andrew Mack (Rutgers) , Tina Kahniashvili (Georgian Academy of Sciences) , Arthur Kosowsky (Rutgers) This is my paper · ORCID
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keywords magneticfieldstochasticbackgroundcomovingmicrowavepower-lawamplitude
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abstract

A stochastic magnetic field in the early Universe will produce anisotropies in the temperature and polarization of the cosmic microwave background. We derive analytic expressions for the microwave background temperature and polarization power spectra induced by vector and tensor perturbations from a power-law magnetic field. For a scale-invariant stochastic magnetic field smoothed over a comoving scale of $1 {\rm Mpc}$, the MAP satellite has the potential to constrain the comoving mean-field amplitude to be no greater than approximately $2\times10^{-9}$ G. Limits improve as the power-law slope increases: for causally-generated power-law magnetic fields, the comoving mean-field amplitude has an upper bound of approximately $4\times10^{-13} {\rm G}$. Such constraints will surpass all current limits on galactic-scale primordial stochastic magnetic fields at decoupling.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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    gr-qc 2025-09 conditional novelty 6.0 of 10

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  5. Inflationary magnetogenesis beyond slow-roll and its induced gravitational waves

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