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Fig. 13.

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HCN(1–0)/CO(1–0) brightness temperature ratio map (RHCN/CO; colour scale and contours) derived at the common (lower) spatial resolution of the CO(1–0) observations of Schinnerer et al. (2000) (≃100 pc). The brown circle of 8″ in radius (≃560 pc) locates the inner region excluded from our analysis of SF relations.
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