Fig. 6

Mid-IR colour magnitude plot of stellar point sources within M 33. Related dusty, high mass loss rate massive evolved objects within M 33 and the Galaxy also plotted for comparison (filled and empty black circles respectively). See Sect. 4.2 for origin of individual data points. Note that J013350.92 = 303936.9 (=UIT218) is associated with the galactic nucleus and is likely a composite source.
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