Fig. 4.
Spatial offsets between gas and SFR tracers in the north-western part of the star-forming ring in M 51. The background grayscale map is a ∼1″ resolution version of the 33 GHz continuum map. Cyan contours correspond to HCN(1–0) emission at ∼1.3″ resolution (levels [6, 8] K km s−1), and red contours correspond to CO(1–0) emission at ∼1″ resolution (levels [150, 350] K km s−1).
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