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Fig. 6


HCN(1–0)/HCO+(1–0) velocity-integrated intensity ratio (left) and the HCN(1–0)/CO(1–0) velocity-integrated intensity ratio (right) in the SB ring. The filled ellipses represent the spatial resolutions used to derive the line ratio maps: 6.6′′ × 5.1′′ PA = 157°.

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