Fig. 3
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Observed H2CO spectra of the dense cores in the DR21 filament obtained with the IRAM 30 m. Red, green, and blue lines show H2CO 303202 , 321−220, and 322−221, respectively. The dense cores, identified through 1.2mm continuum emission as described by Motte et al. (2007), are referenced for nomenclature, positions, and physical parameters in Table1.
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