CMZ gas distribution in our model, schematic representation of CR dynamics, and CR source location. Top panel: CMZ particle column density spatial distribution computed from CO (J = 3–2). The CMZ was covered between −1.07° < l < 1.73° and −0.42° < b < 0.40°, within a velocity range |υ| < 220 km s⁻¹ (Oka et al. 2012). The color scale represents the column number density of H₂, and a low diffusion of CRs is considered within this region. The cyan outer area corresponds to regions where no gas column density was measured, for which a high diffusion of CRs is computed. The green area denotes the zone with polar advection. Bottom panel: CMZ line of sight distribution boundaries for both the disk and ring configurations, according to Paper I. The red ellipse is the external boundary for both scenarios, and the blue ellipse is the internal boundary for the ring scenario. A low diffusion of CRs is defined inside the red ellipse for the disk and between the red and blue ellipses for the ring. High diffusion of CRs is computed over the cyan outer area and inside the red ellipse for the ring scenario. R_E1 and R_E2 are the semi-major and semi-minor axis for the external ellipse, and R_I1 and R_I2 are the semi-major and semi-minor axis for the internal ellipse. Gray zones demarcate the area projected along the line of sight analyzed in the HESS work, where R_P1 and R_P2 are the limits for the projected radii from Sgr A*.