Fig. 3
A plot of the line ratios relative to the integrated intensity of the CO J = 6 − 5 as a function of mass-loss rates. In the lower panel: for ortho-H2O 11,0 − 10,1 (squares), para-H2O 11,1 − 00,0 (circles), NH3 10 − 00 (triangles) scaled up by a factor of 5. The middle panel shows CO J = 10−9 ( × ), CO J = 16 − 15 (stars) and in the upper panel: SO (1313 − 1212) 559.3 and SO (1314 − 1213) 560.2 GHz (triangles) and SO2 (216,16 − 215,17) 558.4 and SO2 (371,37 − 360,36) 659.4 GHz (squares).
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