Star formation relation and location of the regions considered in NGC 7130. Left panel: SFR surface density (Σ_SFR) as a function of the molecular gas surface density (Σ_H2) derived from CO(2–1) in NGC 7130 at 110 pc scale. The blue and black points show the two branches derived applying the MARS method with breaking points in the log Σ_H2 axis. The black dashed lines mark constant depletion times (t_dep = Σ_H2/Σ_SFR). The red and brown solid lines are the best fit for each branch. The Spearman’s rank correlation coefficients (ρ_s) and the power-law indices (N) of the derived best-fit KS relations are indicated. The pink dashed line is the best fit for whole points. The inverted triangles indicate upper limits. The error bars indicate the mean systematic uncertainties in Σ_H2 of ±0.14 dex (horizontal) and the extinction correction in Σ_SFR of ±0.21 dex (vertical). Right panel: Location of the regions on the CO(2–1) map (grey). The black and blue circles correspond to regions in each of the two branches.