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Fig. 3


Left and middle: mass surface density maps of atomic (HI) and molecular (CO(1–0)) gas, at the PACS 160 μm (~12′′) resolution. Right: total gas mass surface density map, based on HI and CO maps, with a 26% correction for helium. The radius of the circumnuclear ring and the locations of the inflow points are indicated with a dashed circle and stars, respectively. Clockwise gas flow is indicated with the white arrows.

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