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Fig. 9


Profiles of formaldehyde (top) and methanol (bottom) lines as observed toward the three sources IRAS 4A, IRAS 4B, and IRAS 4C. IRAS 4C is present at the lower transitions where IRAS 4A is the strongest peak. At higher transitions IRAS 4B is the strongest peak. In all cases IRAS 4A shows the broadest profile of the three sources.

This figure is made of several images, please see below:

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