Histograms of R₂₁ and R₃₁ derived from the ratio maps shown in Figure 11. The ratios are calculated using flux units of Jy beam⁻¹, with the vertical axis presented on a log scale. The median value for each distribution is indicated by a solid gray line, while the IQR (first to third quartiles) is highlighted by the translucent gray shaded area. The gray dashed lines represent a ratio of unity (R = 1) in kelvin units. While the ratios are generally comparable to those observed in typical star-forming galaxies, certain regions exhibit R₂₁ and R₃₁ values exceeding unity in kelvin units.