CO intensity maps. Integrated CO(2–1) intensity maps (including all channels with velocities in the range of ±50 km s ⁻¹ of the local H i mean velocity) for a subsample of the HERACLES dwarf galaxies at a linear gray scale from −0.3 to 0.7 K km s ⁻¹. The galactocentric radius R = R ₂₅ is shown as white contour, the region selected to determine the integrated CO intensity for the entire galaxy as black contour. The remaining HERACLES dwarf galaxies not shown here are non-detections at full resolution.