The line profile parameter P10 = ΔV10/ΔV90 is presented here for a sample of selected sources. Note that this parameter is clearly larger for the broad-based single peaked line profiles. The P10-value is an average of the lower J-transition lines (up to P(14)). The J-transition corresponding to each plotted profile is given in the figure. The narrow absorption line seen toward DoAr24E A is due to 13CO absorption in the foreground cloud.
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