Fig. 5
Top panels: radial profiles of dust emission at 100, 160, 250, 350, 500 μm (from top to bottom) for NGC 4254, NGC 4303, NGC 4321, NGC 4501. Bottom panels: radial profiles of dust mass (green solid line), HI (red long dashed line), H2 (blue dot-dashed line) surface density using a uniform conversion factor XCO ≈ (1.8 ± 0.3) × 1020 cm-2, and the O/H radial gradient (dotted line, scaled of a factor 10.5 to match the logarithmic scale of the other quantities).
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