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Fig. 16

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Power spectra derived in DR20 for HCO+ (1 − 0), H13CO+(1 − 0) and N2H+(1 − 0). The dots and colored area correspond to the HCO+ data and their 1 σ uncertainty. The black line is the fit to the data between 5″ and 90″. For comparison, we show the fits to the corresponding H13CO+ and N2H+ in blue and green. The bottom panel presents the residuals of the HCO+ fit.

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