Fig. 5
Simulated background emissivities calculated for an evenly spaced grid of HII regions in the Galactic plane. The axes are in kiloparsec; the Sun is located at (0,−8.5). From left to right: toy model 1, toy model 2, toy model 3, and toy model 4. For clarity the radii for the inner region are plotted in black. No normalization of the values has been performed.
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