Speaker
Dr
Giorgio Galanti
(INAF, Osservatorio Astronomico di Brera)
Description
Axion-like particles (ALPs) are very light, neutral, pseudo-scalar bosons
which are supposed to interact with two photons. They can give rise to
very interesting astrophysical effects taking place in the very-high
energy band and above (10 GeV – 1000 TeV) when an external magnetic field
is present. We analyze the propagation of the photon-ALP beam generated as
pure photons at the jet base of a BL Lac, we study the photon-ALP
oscillations during its path up to us while crossing the BL Lac magnetic
field, the intergalactic magnetic field which we describe by means of an
improved model and the Milky Way magnetic field. Our results are of great
importance for the new generation of gamma-ray observatories like CTA,
HAWC, GAMMA-400, LHAASO and TAIGA-HiSCORE.
Primary authors
Dr
Carmelo Evoli
(II. Institut für Theoretische Physik, Universität Hamburg)
Dr
Fabrizio Tavecchio
(INAF, Osservatorio Astronomico di Brera)
Dr
Giorgio Galanti
(INAF, Osservatorio Astronomico di Brera)
Dr
Marco Roncadelli
(INFN - Pavia)
