Very-high-energy quasars hint at ALPs
High Energy Astrophysical Phenomena
2013-10-11 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
One of the mysteries of very-high-energy (VHE) astrophysics is the observation of flat spectrum radio quasars (FSRQs) above about 30 GeV, because at those energies their broad line region should prevent photons produced by the central engine to escape. Although a few astrophysical explanations have been put forward, they are totally ad hoc. We show that a natural explanation emerges within the conventional models of FSRQs provided that photon-ALP oscillations take place inside the source for the model parameters within an allowed range.
Cite
@article{arxiv.1310.2829,
title = {Very-high-energy quasars hint at ALPs},
author = {Marco Roncadelli and Giorgio Galanti and Fabrizio Tavecchio and Giacomo Bonnoli},
journal= {arXiv preprint arXiv:1310.2829},
year = {2013}
}
Comments
4 pages, 3 figures. Proceeding of the workshop "9th Patras Workshop on Axions, WIMPs and WISPs", 24 - 28 June 2013, Schloss Waldhausen, Mainz, Germany (to be published in the Proceedings)