Submillimeter–HCN diagram proposed by Izumi et al. (2016) for the high-resolution observations (spatial resolution < 500 pc) using the line intensity ratios and R_HCN/CS. The red circles represent the measurements of galaxies hosting an AGN and the blue squares indicate the ratios found in starburst galaxies. We include the line ratios of NGC 613 (diamonds) measured in the CND, referred to here as AGN and in a clump detected ∼250 pc northeast of the central position in all the dense tracers shown in Fig. 10.