Open AccessCan the TeV gamma-ray sky probe the galactic cosmic ray distribution?
Author(s) -
G. Pagliaroli,
Maddalena Cataldo,
Vittoria Vecchiotti,
F. L. Villante
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1468/1/012099
Subject(s) - physics , cosmic ray , astrophysics , sky , galaxy , astronomy , gamma ray , ultra high energy cosmic ray , flux (metallurgy) , cosmic cancer database , materials science , metallurgy
We evaluate the diffuse gamma-ray flux at TeV energies produced by hadronic interactions of cosmic rays with the gas contained in the galactic disk. We consider different assumptions for the cosmic ray distribution, including the recently emerged possibility of a harder cosmic ray spectrum in the inner Galaxy. We show that observational data provided by Argo-YBJ, HESS, HAWC and Milagro, can already discriminate among different hyphoteses. The constraints can be strengthened if the contribution of sources not resolved by HESS is taken into account.