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Paper detail

Have Cherenkov telescopes detected a new light boson?

Recent observations by H.E.S.S. and MAGIC strongly suggest that the Universe is more transparent to very-high-energy gamma rays than previously thought. We show that this fact can be reconciled with standard blazar emission models provided that photon oscillations into a very light Axion-Like Particle occur in extragalactic magnetic fields. A quantitative estimate of this effect indeed explains the observed data and in particular the spectrum of blazar 3C279.

preprint2010arXivOpen access
Marco RoncadelliAlessandro De AngelisOriana Mansutti
astro-ph.COhep-phastro-ph.HE
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Marco RoncadelliAlessandro De AngelisOriana Mansutti

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