Image Details
Caption: Figure 10.
Detected (red) and noise (blue) 12CO and 13CO average Galactic integrated intensities as a function of Galactocentric radius (in bins of width 0.1 kpc), in the GRS+UMSB surveys (top left), in EXFC 135–165 (top right) and in EXFC 55–100 (bottom). The ratio of the 12CO and 13CO intensities is shown in the bottom sub-panels.
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