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Fig. 9.

image

Cumulative histogram of masses of the 24 red supergiants in Cygnus identified in this work. The solid line shows the corresponding best-fit cumulative histogram derived from the star formation history depicted in Fig. 4.4. For reference, the predicted cumulative histograms obtained assuming a constant star formation rate (dotted line) and a star formation rate increasing linearly with time (dashed line) are shown as well.

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