Fig. 1
CS J = 3−2 line observed with the IRAM 30 m telescope in the 25 carbon stars (black histograms). U Cam shows emission contribution from the present day wind and the detached envelope. The green histogram corresponds to the observed line profile in which a fit to the detached envelope contribution (the wider one) has been subtracted. The blue lines indicate the calculated line profiles from the best-fit LVG model.
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