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Fig. 2

RADEX non-LTE modeling of the gas kinetic temperature and spatial density, using the para-H2CO 321–220/303–202 (red solid and dashed lines are observed values and uncertainties) and para-H2CO 303–202/C18O 2–1 (blue solid and dashed lines) integrated intensity ratios. For details, see the notes to Table 3.
This figure is made of several images, please see below:
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