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Fig. 4


13CO (left) and C18O (right) 2–1 channel maps within the inner 10″ toward TMC1A. The velocities in km s-1 are indicated at the top left in each panel. The contours are drawn at every 3σ starting from 5σ where σ = 12 mJy km s-1 for 13CO and 10 mJy km s-1 for C18O.

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