TY  - CONF
AU  - Roncadelli, M.
AU  - Galanti, G.
AU  - Tavecchio, F.
AU  - Bonnoli, G.
TI  - Very-high-energy quasars hint at ALPs
IS  - DESY-PROC-2013-04
CY  - Hamburg
PB  - Verlag Deutsches Elektronen-Synchrotron
M1  - PUBDB-2018-02792
M1  - DESY-PROC-2013-04
SN  - 978-3-935702-83-6 
T2  - DESY-PROC
SP  - 89-92
PY  - 2013
AB  - One of the mysteries of very-high-energy (VHE) astrophysics is the observatio 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.
T2  - 9th Patras Workshop on Axions, WIMPs and WISPs
CY  - 24 Jun 2013 - 28 Jun 2013, Mainz (Germany)
Y2  - 24 Jun 2013 - 28 Jun 2013
M2  - Mainz, Germany
KW  - Hypothetisches Teilchen (gnd)
LB  - PUB:(DE-HGF)29 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.3204/DESY-PROC-2013-04/roncadelli_marco
UR  - https://bib-pubdb1.desy.de/record/408339
ER  -