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Fig. 4

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CO integrated intensity moment map at native resolution, without any filtering or masking. Cyan box-shaped regions are defined by the positions at which we detected the 13CO (J = 2−1) line. Inset panels show the mean spectra of 12CO (magenta) and 13CO (blue) within the cyan boxes. The intensity of the 13CO emission is approximately an order of magnitude lower than 12CO.

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