Speaker
Description
Motivated by recent observations of Galactic TeV gamma-ray sources and their uncertain origins, we investigate the propagation of gamma rays in our Galaxy.
TeV and PeV gamma rays produce electron-positron pairs over Galactic length scales due to interactions with background radiation fields, i.e. Cosmic Microwave Background (CMB) and Intra Stellar Radiation Field (ISRF). The highly energetic charged particles are deflected by the Galactic Magnetic Field (GMF) and, in turn, they might scatter background photons up to several TeVs, the well-known inverse Compton process. These processes trigger lectromagnetic cascades, which can eventually be detected by an observer at Earth.
Employing the latest tools of CRPropa 3.2, we simulate the emission from sources located at different position in our Galaxy, trying to spot hints of extended emission and spectral features in dependence to the galactic environment properties (GMF and the spatial-dependent ISRF). We find that the combination of CMB and ISRF can affect the observables from Galactic gamma-ray sources.
The preliminary results will be presented concurrently with future perspectives and possible improvements to this work.
