Generation of Large-Scale Magnetic Fields from Dilaton Inflation in Noncommutative Spacetime

Details Generation of Large-Scale Magnetic Fields from Dilaton Inflation in Noncommutative Spacetime Generation of Large-Scale Magnetic Fields from Dilaton Inflation in Noncommutative Spacetime

2005-02-28

arxiv.org/abs/hep-ph/0502244v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

To be published in the proceedings of 22nd Texas Symposium on Relativistic Astrophysics, Stanford University, December 2004, (

Scientific paper

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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