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Fig. 15
Dependency of the H2CO 3(0, 3)–2(0, 2) over 3(2, 1)–2(2, 0) line ratio on kinetic temperature and volume density for an assumed column density of 1014 cm-2 and a linewidth of 10 km s-1. The black contours show the line ratio at the labelled intervals. The yellow contour shows a line ratio value of 1.4.
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