Have Cherenkov telescopes detected a new light boson?
High Energy Astrophysical Phenomena
2015-05-18 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
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.
Keywords
Cite
@article{arxiv.1002.4523,
title = {Have Cherenkov telescopes detected a new light boson?},
author = {Marco Roncadelli and Alessandro De Angelis and Oriana Mansutti},
journal= {arXiv preprint arXiv:1002.4523},
year = {2015}
}
Comments
3 pages, 1 figure, Proceeding of the "Eleventh International Workshop on Topics in Astroparticle and Underground Physics" (TAUP), Roma, Italy, 1 - 5 July 2009 (to be published in the Proceedings)