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Large-scale magnetic fields from dilaton inflation in noncommutative spacetime

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arxiv hep-ph/0409237 v1 pith:5SDPR273 submitted 2004-09-21 hep-ph astro-phhep-th

Large-scale magnetic fields from dilaton inflation in noncommutative spacetime

classification hep-ph astro-phhep-th
keywords fieldsdilatonlarge-scalemagneticspacetimeaccountgalaxiesinflation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The generation of large-scale magnetic fields is studied in dilaton electromagnetism in noncommutative inflationary cosmology taking into account the effects of the spacetime uncertainty principle motivated by string theory. We show that it is possible to generate large-scale magnetic fields with sufficient strength to account for the observed fields in galaxies and clusters of galaxies through only adiabatic compression without dynamo amplification mechanism in models of power-law inflation based on spacetime noncommutativity without introducing a huge hierarchy between the dilaton's potential and its coupling to the electromagnetic fields.

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Cited by 1 Pith paper

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    Resonant conversion of axion-like particles into photons in nanogauss primordial magnetic fields is claimed to explain both the ARCADE2 radio excess and the EDGES 21-cm trough for axion masses near 10^-14 to 10^-12 eV.