Fig. 1
Correlation of F70 and the cluster mass is shown in the upper left panel. The upper right panel shows that clusters of larger mass are associated with brighter CO J = 2–1 lines. The bottom panels display the marginal correlation between the line intensity ratio I2−1/I1−0 and the galactocentric radius and the good correlation between I2−1/I1−0 and the line width ratio W2−1/W1−0. Triangles are for variable stars (s1, s3) and are displayed only in the lower panels.
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