Fig. 7

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Top: distributions of FWHM for DCO+ (red bars) and H13CO+ (orange bars) 1−0 in 46 sources where DCO+ and H13CO+ 1−0 were detected using the high-velocity resolution mode (AROWS mode 13). Bottom: distribution of FWHM of DCO+ in sources for which only DCO+ 1−0 was detected (red bars) and distribution of FWHM of H13CO+ in sources for which only H13CO+ 1−0 was detected (orange bars).
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