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Fig. A.6
Spectra of DCO+(2–1) and H13CO+(1–0) (black) compared to D13CO+(2–1) and HC18O+(1–0) respectively towards the DCO+(2–1) emission peaks. For convenient comparison the DCO+(2–1) spectra are divided by 10 and the H13CO+(1–0) spectra are divided by 5. The cores with an asterisk (*) near the title contain embedded protostrars.
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