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Fig. 12

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Left: the higher J-transition 12CO P(32) (green) is plotted on top of the lower J-transition 12CO P(8) (black) for S CrA B. The narrow component of the 12CO P(8) line decreases with increasing excitation. Right: two Gaussian fitted lines (in red and blue) to the CO v = 1–0 P(7) line of DR Tau (black). The green line represents the sum of the two Gaussian fits.

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