Consequences of using a new ISRF model for modeling Galactic diffuse gamma-ray emission
F. Niederwanger, O. Reimer*, R. Kissmann, C. C Popescu and R. J Tuffs
August 16, 2017
August 03, 2018
Galactic diffuse gamma-ray emission is an important constituent among the total observed gamma-ray emission of our Galaxy. Here we present specific developments to accommodate a new Interstellar Radiation Field (ISRF) model for use in the PICARD code for modeling of Galactic cosmic ray propagation and respective gamma-ray emission. On the basis of the new ISRF we provide predictions on Galactic diffuse gamma-ray emission in the GeV to TeV energy regime, and compare to a commonly used different ISRF. Emphasis was laid on obtaining robust predictions for observable signatures in the very high energy gamma-ray regime with a special attention to the energy regime for HESS. One of the most noteworthy results from using the new ISRF indicate increased gamma-ray fluxes in the Galactic Center region between 10 GeV and 10 TeV.
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