Synthetic maps of Gamma-ray flux and analysis areas. Top and middle panels: gamma-ray flux synthetic maps as observed from Earth for the CMZ ring model (top) and disk model (middle) models. Both maps have been smoothed with a 0.08° Gaussian function to adopt the HESS beamwidth. The yellow contour compares the observed gamma-ray area published in the HESS Galactic plane survey (H.E.S.S. Collaboration 2018), with the synthetic maps’ extension. The contour level is 1 × 10⁻¹³ erg cm⁻² s⁻¹. Bottom panel: regions where we compare our models with the H.E.S.S. Collaboration (2016) observations in Figs. 3 and 4, shown at the same scale.