Fig. 12
χ2-confidence contour plots for temperature and number density determined from the observed H2CO lines and RADEX models. Left: fit to the average intensity in the northern ridge, N = 5 × 1013 cm-2. Right: fit to the average intensity in the southern ridge, N = 5 × 1013 cm-2. The greyed areas represent solutions with masing H2CO emission.
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