Fig. 6
Co-added line profiles from sources with detected CO emission. In each plot the 12CO v = 1−0 line is shown in red, the 13CO v = 1−0 line is shown in blue, the C18O v = 1−0 line is shown in pink (IRS 44 W and GSS 30), and 12CO v = 2−1 line is shown in green. Inserts zoom in to compare the 12CO emission line profile to that of 13CO, C18O, or v = 2−1, depending on the source.
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