Magnetic Helicity Generation from the Cosmic Axion Field

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dc.creatorCampanelli, L.
dc.creatorGiannotti, M.
dc.date2005-08-30
dc.date2005-12-12
dc.date.accessioned2026-07-07T10:27:37Z
dc.date.available2026-07-07T10:27:37Z
dc.descriptionThe coupling between a primordial magnetic field and the cosmic axion field generates a helical component of the magnetic field around the time in which the axion starts to oscillate. If the energy density of the seed magnetic field is comparable to the energy density of the universe at that time, then the resulting magnetic helicity is about |H_B| \simeq (10^{-20} G)^2 kpc and remains constant after its generation. As a corollary, we find that the standard properties of the oscillating axion remain unchanged even in the presence of very strong magnetic fields.
dc.description6 pages, 2 figures. Accepted for publication in Phys. Rev. D. Minor revisions and new references added
dc.identifierhttps://arxiv.org/abs/astro-ph/0508653
dc.identifierhttp://arxiv.org/abs/astro-ph/0508653
dc.identifierPhys.Rev.D72:123001,2005
dc.identifierdoi:10.1103/PhysRevD.72.123001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177200
dc.subjectAstrophysics
dc.titleMagnetic Helicity Generation from the Cosmic Axion Field
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