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Photon-axion mixing and ultra-high-energy cosmic rays from BL Lac type objects -- Shining light through the Universe

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arxiv 0901.4085 v3 pith:5IU3NJWA submitted 2009-01-26 astro-ph.HE hep-ph

Photon-axion mixing and ultra-high-energy cosmic rays from BL Lac type objects -- Shining light through the Universe

classification astro-ph.HE hep-ph
keywords objectsdistantgalaxiesparticlesphotonstypeultra-high-energyactive
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Photons may convert into axion like particles and back in the magnetic field of various astrophysical objects, including active galaxies, clusters of galaxies, intergalactic space and the Milky Way. This is a potential explanation for the candidate neutral ultra-high-energy (E>10^18 eV) particles from distant BL Lac type objects which have been observed by the High Resolution Fly's Eye experiment. Axions of the same mass and coupling may explain also TeV photons detected from distant blazars.

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