253 citations · 1.9k across the 62 of their papers we have counts for
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Very-high-energy quasars hint at ALPs
Marco Roncadelli, Giorgio Galanti, Fabrizio Tavecchio +1
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…
Comment on "Irregularity in gamma ray source spectra as a signature of axion-like particles"
Giorgio Galanti, Marco Roncadelli
D. Wouters and P. Brun in Phys. Rev. D 86, 043005 (2012) claim that an observable effect in the spectra of distant very-high-energy blazars arises as a consequence of oscillations…
Transparency of the Universe to gamma rays
Alessandro De Angelis, Giorgio Galanti, Marco Roncadelli
Using the most recent observational data concerning the Extragalactic Background Light and the Radio Background, for a source at a redshift z_s < 3 we compute the energy E_0 of an…