253 citations · 1.9k across the 62 of their papers we have counts for
8 papers · 1 filter
Assessment of ALP scenarios for GRB 221009A
Giorgio Galanti, Marco Roncadelli, Fabrizio Tavecchio
About one month after the revolutionary discovery of the Gamma Ray Burst (GRB) GRB 221009A and intense theoretical efforts to explain its detection, time seems to us ripe to make a…
Observability of the very-high-energy emission from GRB 221009A
Giorgio Galanti, Lara Nava, Marco Roncadelli +2
The LHAASO Collaboration detected the gamma ray burst GRB 221009A at energies above with a tail extending up to , whose spectral analysis has pres…
ASTRI Mini-Array Core Science at the Observatorio del Teide
S. Vercellone, C. Bigongiari, A. Burtovoi +84
The ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana) Project led by the Italian National Institute for Astrophysics (INAF) is developing and will deploy at the Obse…
Axion-like Particles Implications for High-Energy Astrophysics
Giorgio Galanti, Marco Roncadelli
We offer a pedagogical introduction to axion-like particles (ALPs) as far as their relevance for high-energy astrophysics is concerned, from a few MeV to 1000 TeV. This review is s…
Revisiting the evidences for spectral anomalies in distant blazars: new data on the photon-ALP mixing
Francesco Cenedese, Alberto Franceschini, Giorgio Galanti
We re-examine possible dependencies on redshift of the spectral parameters of blazars observed at very-high energies (VHEs) with Imaging Atmospheric Cherenkov telescopes (IACTs). T…
ALP induced polarization effects on photons from galaxy clusters
Giorgio Galanti, Marco Roncadelli, Fabrizio Tavecchio +1
Many extensions of the Standard Model of particle physics and in particular superstring and superbrane theories predict the existence of axion-like particles (ALPs). ALPs are very…
Photon-ALP oscillations inducing modifications to photon polarization
Giorgio Galanti
Axion-like particles (ALPs) are very light, neutral, spin zero bosons predicted by many theories which try to complete the standard model of elementary particles. ALPs interact pri…
Photon-ALP interaction as a measure of initial photon polarization
Giorgio Galanti
Axion-like particles (ALPs) are very light, neutral, spin zero bosons predicted by superstring theory. ALPs interact primarily with two photons and in the presence of an external m…