Photon-axion conversion in Active Galactic Nuclei?

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dc.creatorBassan, Nicola
dc.creatorRoncadelli, Marco
dc.date2009-05-25
dc.date.accessioned2026-07-07T13:17:44Z
dc.date.available2026-07-07T13:17:44Z
dc.descriptionAxion-Like Particles (ALPs) are the focus of intense current research. We analyze photon-ALP conversion in the context of relativistic jet models of Active Galactic Nuclei (AGN) for more than 100 sources. Contrary to previous claims, we find that this process cannot occur above 100 GeV regardless of the actual AGN model and the values of ALP parameters. This result rules out a proposed strategy to bypass the cosmic opacity above 100 GeV, as apparently required by observations. We also show that for some AGN an observable effect can show up in the X and soft gamma-ray bands.
dc.description5 pages, 4 figures, submitted to PRL
dc.identifierhttps://arxiv.org/abs/0905.3752
dc.identifierhttp://arxiv.org/abs/0905.3752
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/231209
dc.subjectHigh Energy Astrophysical Phenomena
dc.subjectCosmology and Nongalactic Astrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePhoton-axion conversion in Active Galactic Nuclei?
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