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Fig. 1
12CO (left) and 13CO (right) molecular lines observed in CRL 618 (filled histogram) and model-fitting results (solid lines). Systemic velocity of the source of Vsys = −21 km s-1. We note that other molecular lines appear within the shown spectral range, especially in the 12CO high-J profiles.
This figure is made of several images, please see below:
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