Spectra of Magnetic Fields Injected during Baryogenesis

Details Spectra of Magnetic Fields Injected during Baryogenesis Spectra of Magnetic Fields Injected during Baryogenesis

2010-01-26

arxiv.org/abs/1001.4817v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, 9 figures; revised discussion and added new references; version accepted for publication in PRD

Scientific paper

Helical magnetic fields are injected into the cosmic medium during cosmological baryogenesis and can potentially provide a useful probe of the early universe. We construct a model to study the injection process during a first order phase transition and to determine the power spectra of the injected magnetic field. By Monte Carlo simulations we evaluate the Fourier space symmetric and helical power spectra of the magnetic field at the time the phase transition completes. The spectra are peaked at the scale given by the inverse size of bubbles at percolation and with a comparable width. These injected magnetic fields set the initial conditions for further cosmological magneto-hydrodynamical evolution.

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